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Article

Biochemical and Antioxidant Properties as well as Antimicrobial and Antibiofilm Activities of Allium scorodoprasum subsp. jajlae (Vved.) Stearn

1
Department of Biology, Faculty of Science, Dokuz Eylül University, Izmir 35390, Turkey
2
Fauna and Flora Research and Application Center, Dokuz Eylül University, Izmir 35390, Turkey
3
Department of Biology, Graduate School of Natural and Applied Science, Dokuz Eylül University, Izmir 35390, Turkey
4
Department of Biology, Graduate School of Natural and Applied Sciences, Kastamonu University, Kastamonu 37150, Turkey
5
Department of Forestry, Yenice Vocational School, Çanakkale Onsekiz Mart University, Çanakkale 17950, Turkey
6
Department of Biology, Faculty of Science, Kastamonu University, Kastamonu 37150, Turkey
*
Author to whom correspondence should be addressed.
Curr. Issues Mol. Biol. 2023, 45(6), 4970-4984; https://doi.org/10.3390/cimb45060316
Submission received: 6 May 2023 / Revised: 1 June 2023 / Accepted: 4 June 2023 / Published: 7 June 2023

Abstract

:
In this study, the chemical composition and biological activity of Allium scorodoprasum subsp. jajlae (Vved.) Stearn were investigated for the first time, focusing on its antimicrobial, antioxidant, and antibiofilm properties. A GC-MS analysis was employed to evaluate the composition of its secondary metabolites, identifying linoleic acid, palmitic acid, and octadecanoic acid 2,3-dihydroxypropyl ester as the major compounds in ethanol extract. The antimicrobial activity of A. scorodoprasum subsp. jajlae was assessed against 26 strains, including standard, food isolate, clinical isolate, and multidrug-resistant ones, as well as three Candida species using the disc diffusion method and the determination of the minimum inhibitory concentration (MIC). The extract showed strong antimicrobial activity against Staphylococcus aureus strains, including methicillin-resistant and multidrug-resistant strains, as well as Candida tropicalis and Candida glabrata. Its antioxidant capacity was evaluated using the DPPH method, revealing a high level of antioxidant activity in the plant. Additionally, the antibiofilm activity of A. scorodoprasum subsp. jajlae was determined, demonstrating a reduction in biofilm formation for the Escherichia coli ATCC 25922 strain and an increase in biofilm formation for the other tested strains. The findings suggest potential applications of A. scorodoprasum subsp. jajlae in the development of novel antimicrobial, antioxidant, and antibiofilm agents.

1. Introduction

Antimicrobial resistance undeniably stands as one of the most pressing and significant medical challenges of the 21st century. Recognizing its far-reaching implications, the World Health Organization has classified antimicrobial resistance as a major threat to both global health and food security [1]. Despite the development of effective antimicrobials over the years, the mounting resistance to existing antimicrobial agents has become increasingly concerning [2]. The emergence of multidrug resistance, predominantly among Gram-negative bacteria but also impacting all bacteria types, demands particular attention [3]. Consequently, the development of novel antimicrobial drugs is of paramount importance. Although the advent of antibiotics led to a decline in the use of plant-derived antimicrobials, microbiologists have recently renewed their interest in antimicrobial plant extracts for several reasons [4]. Plant materials, therefore, continue to serve as a vital and promising source of medicine in the global fight against severe diseases.
In recent years, there has been a worldwide trend toward natural phytochemicals, most commonly found in herbs, seeds, beans, fruits, vegetables, and teas [5]. The therapeutic value of plants comes from some chemical compounds that are active and have an impact on the body. Alkaloids, tannins, flavonoids, and phenolic compounds are the most significant of these bioactive plant substances [6]. Phenolic compounds have effectively been used to prevent pathogenic bacteria from growing and forming biofilms [7]. In addition to the identification of novel therapeutic molecules, these compounds naturally occurring in higher plants have long been known to have antioxidant activity. Recently, the biochemical actions of naturally occurring antioxidants and the role of oxygen-containing free radicals in biological systems have gained significant attention [8].
The antimicrobial activity and bioactive chemical compounds of Allium species have been known for a long time, exhibiting inhibitory effects against a wide range of pathogens, including bacteria, fungi, viruses, and parasites [9]. Allium is the most important among the 30 genera of the Alliaceae family. Plants of this genus form tubers or bulbs, and the flower stalks can reach heights from a few centimeters to one and a half meters [10,11]. Many Allium species, including economically significant ones such as onions, garlic, chives, and leeks, are still utilized today as vegetables, seasonings, and medicinal plants. Many species of Allium are also widely used in folk medicine for various health issues, such as hemorrhoids, hypertension, rheumatism, and hair loss [12,13,14]. Pharmacological investigations into Allium scorodoprasum tubers have revealed a range of bioactive properties, including antioxidant, antiviral, antifungal, antibacterial, anti-obesity, anti-hypertensive, diuretic, and anticancer effects [15].
The Allium genus presents considerable taxonomic challenges; despite Allium scorodoprasum subsp. jajlae being previously classified as an independent species under the designation A. jajlae and, in certain instances, categorized within alternative species, comprehensive taxonomic revisions have ultimately established its most accurate classification as a subspecies within A. scorodoprasum [16].
In this study, the antioxidant, antibiofilm, and antimicrobial activities of A. scorodoprasum subsp. jajlae samples collected from Samsun, Türkiye were investigated. The antibacterial activity of the ethanol extract against 23 bacteria and 3 yeast species was evaluated using the disc diffusion method. MIC tests were also performed on the microorganisms, which showed significant results. The antibiofilm activity was assessed on five bacteria previously identified to have biofilm formation. Moreover, a GC-MS analysis was employed to examine the samples’ volatile content and secondary metabolites. This research represents the first study on A. scorodoprasum subsp. jajlae samples in the literature.

2. Materials and Methods

2.1. Plant Sample

Dr. Mustafa Eray Bozyel collected and identified the plant samples of A. scorodoprasum subsp. jajlae, which were found in the region of Samsun, Turkey. Voucher specimens were stored at Dokuz Eylül University’s FAMER (Research and Application Center of Fauna Flora), under the personal herbarium sample number FFBDEU-ERC0018.

2.2. Extraction Process

Upon collection, all of the plants were dried and subsequently ground into a fine powder using a grinder, emphasizing the use of the whole plant. The powdered plant material was subjected to two separate agitation processes: one in ethanol (Sigma-Aldrich, St. Louis, MO, USA) and the other in water, both at 160 rpm for two days at ambient temperature. Following the agitation, the mixtures were filtered using Whatman No.1 filter paper to remove any remaining residues. The ethanol extract were subsequently evaporated using a rotary evaporator at 40 °C and the water extract was evaporated by a freeze dryer under vacuum [17]. The dried extracts were weighed, after which an extract stock was prepared. For disc diffusion, 50, 100, and 200 µL of this extract, corresponding to 0.9625, 1.925, and 3.85 mg, respectively, were applied onto empty, sterile antibiotic discs. For the MIC test, the plant sample was dissolved in DMSO, and DMSO was employed as a negative control at non-toxic concentrations (0.5 to 0.005%). The final DMSO and water solutions were filtered using a 0.45 µm filter.
Ethanol was used in antibacterial, antifungal, and antioxidant tests to determine the biochemical composition of the extract. Since this extract contains ethanol, it was replaced with water in order not to inhibit the growth of microorganisms in the antibiofilm study.

2.3. Microorganisms

In this study, a total of 23 bacterial strains were utilized, including 6 standard strains, 6 food isolates, 5 clinical isolates, and 6 multi-drug resistant strains. Additionally, the antifungal activity of the plant sample was tested against standard yeast Candida albicans DSMZ 1386 and clinically isolated yeasts, Candida glabrata and Candida tropicalis. The bacteria and yeast strains were obtained from the Department of Biology at Dokuz Eylül University’s Faculty of Science (Izmir, Türkiye).

2.4. Inoculum Preparation

All bacterial strains were incubated for 24 h at 37 °C, while Candida albicans DSMZ 1386, Candida glabrata, and Candida tropicalis were incubated for 48 h at 28 °C. Each inoculum was prepared separately by collecting morphologically similar colonies from nutrient agar by a sterile loop and suspended in 0.9% sterile saline solution. The turbidity of each inoculum was adjusted by comparing the 0.5 McFarland standard. After standardization of all the inocula, they were accepted to contain approximately 108 CFU·mL−1 for bacteria and 107 CFU·mL−1 for yeasts [17].

2.5. Antimicrobial Assay

The disc diffusion assay, as described by Andrews, was used to evaluate the antibacterial activity of A. scorodoprasum subsp. jajlae ethanol extract [18]. Mueller–Hinton agar was poured into 90 mm sterile Petri dishes to achieve an average depth of 4.0 ± 0.5 mm. Empty 6 mm antimicrobial susceptibility test discs were impregnated with the extracts. To eliminate potential solvent residue that could influence the outcome, the discs were dried at 30 °C for 24 h. The culture medium surfaces were then inoculated with microorganisms suspended in a saline solution. In aseptic conditions, the plates were allowed to dry for 5 min at room temperature before the discs were positioned onto the plates [17]. After incubation, the inhibitory zone sizes were measured and recorded. In the disc diffusion assay, empty sterile discs and the extraction solvent ethanol served as negative controls, while gentamicin was used as a positive control.
The minimum inhibitory concentration (MIC) values of the plant samples were determined using the broth microdilution technique [19]. Mueller–Hinton broth (MHB) was employed for cultivating various microbial strains. The cell density of each reference strain solution was adjusted to the 0.5 McFarland standard (1.5 × 108 CFU/mL). A series of plant material dilutions were prepared, and a 100 µL sample from each dilution was transferred into 96-well sterile plates. Then, 50 µL of the microbial inocula was added to achieve a final volume of 100 µL in each well. Visual inspection was used to assess microbial growth. The positive control consisted of MHB inoculated with the test microorganisms. The MIC is the minimum concentration of plant sample necessary to inhibit bacterial growth after a 24-h incubation period. The results were reported in mg/mL following three repetitions of the tests.

2.6. Determination of Scavenging Activity on 1,1-diphenyl-2-picrylhydrazyl (DPPH) Radicals

This method evaluates the antioxidant capacity of the extract by measuring its ability to scavenge DPPH radicals. A total of 3.9432 mg of 2,2-diphenyl-1-picrylhydrazyl (DPPH) was accurately weighed and dissolved in 50 mL of ethanol to prepare the DPPH solution [8]. To protect the DPPH solution from light exposure, the exterior of the glass bottle was covered with aluminum foil. The extract was mixed with the DPPH solution, and the resulting mixture was allowed to stand at room temperature in the dark for 30 min. After incubation, the absorbance of the samples was measured at 515 nm using a spectrophotometer. Ascorbic acid was employed as a positive control in the antioxidant assay [20].

2.7. Antibiofilm Activity Assessment

The antibiofilm activity test used in this study was adapted from Karaca et al. [21] and consists of two stages: determining the conditions for biofilm formation and assessing the antibiofilm activity of A. scorodoprasum subsp. jajlae water extract.
For determining biofilm formation conditions, all strains were adjusted to 0.5 McFarland and added to media with glucose monohydrate ratios of 0%, 0.5%, 1.5%, 2%, and 2.5% for 24 and 48 h of culturing at 37 °C. After incubation, 200 μL of crystal violet was added to each well of the microplate, left for 15 min, and then washed with distilled water. Finally, 200 μL of an ethanol/acetone (70:30) solution was added to the wells, and after 15 min, the solution was transferred to clean microplates using a micropipette. Measurements were made at 550 nm on microplates. Following the protocols, high-biofilm-production conditions for B. subtilis DSMZ 1971, L. monocytogenes ATCC 7644, E. coli ATCC 25922, L. innocua, and E. coli (MDR) strains, which were selected according to previous unpublished studies, were determined as 48 h and a 1.5% glucose monohydrate concentration.
To assess antibiofilm activity, 100 μL of A. scorodoprasum subsp. jajlae water extract was added to the wells in row A of microplates containing media with a 1.5% glucose monohydrate concentration. The extract in the first well was diluted two-fold from row A to row G. Strains were transferred to microplates and standardized to 0.5 McFarland in sterile 0.9% saline solution before 48 h of incubation at 37 °C. Halamid was used as a positive control. After incubation, the procedures from the first step were performed on the microplates, and antibiofilm activities were determined by taking readings at 550 nm with a microplate reader device.

2.8. Gas Chromatography–Mass Spectrometry (GC-MS) Analysis

For many years, GC-MS has been employed as a technique to characterize the chemical composition of plants [22]. Gas chromatography separates the components within the mixture, while mass spectrometry aids in the structural identification of each component. In this study, an Agilent 8890 model GC/MS device with an HP-5 column was utilized. For the identification of chemical constituents, the analytical conditions included the following: an injector at 350 °C; carrier gas helium at 1.78 mL/min; injection mode: split, split ratio 10:1; volume injected: 1 µL of ethanol extract; and oven temperature programmed as follows: 40 °C to 150 °C at 4 °C/min, 150 °C to 180 °C at 3 °C/min, 180 °C to 230 °C at 2 °C/min, and 230 °C to 280 °C at 1 °C/min; pressure: 100 kPa; and total flow: 13.7 mL/min. MS scanning conditions included an interface temperature of 250 °C and an ion source temperature of 200 °C [17]. Using the GC/MS method, ions generated by electron ionization were separated according to their mass-to-charge ratios and recorded by the detector, with data obtained via computer. Compounds were identified by comparing data with the latest NIST and Wiley data libraries.

2.9. Statistical Analysis

All experiments were conducted in triplicate. For the statistical analysis, a one-way ANOVA was employed, with a significance level set at 0.05. The Pearson correlation coefficient was calculated to assess the relationship between concentration and activity. All statistical analyses were performed using R Studio [23].

3. Results

The ethanol extract of A. scorodoprasum subsp. jajlae was tested against 26 strains to determine its antimicrobial and antifungal activity, and it exhibited activity against 12 strains. The extract showed antimicrobial activity against S. aureus, including standard, multi-drug resistant (MDR), and methicillin-resistant (MRSA) strains, as well as another Staphylococcus species, S. epidermidis. The extract was also found to be effective against two clinically isolated Candida yeast strains, Candida tropicalis and Candida glabrata. Furthermore, the extract demonstrated activity against two food isolate Salmonella strains, S. infantis and S. kentucky.
The antimicrobial and antifungal activity results are presented in the tables below, with the inhibition zone diameters given in millimeters and represented by the mean values of three replicates along with the standard errors. Table 1 shows the antimicrobial susceptibility of the standard strains, Table 2 displays the susceptibility of the food isolate strains, Table 3 presents the results for the clinical isolate strains, and Table 4 covers the susceptibility of the MDR strains, all of which were assessed by the disc diffusion method. No activity was observed for the negative controls. Furthermore, the statistical analysis revealed no significant differences between the outcomes of the three replicates for each extract concentration (p > 0.05).
The MIC values are presented in Table 5, and the plant extract exhibited the most potent effect against the four strains of the Staphylococcus genus, with MIC values of 4.81 and 9.62 mg/mL. The extract demonstrated a less pronounced impact on S. mutans compared to other Staphylococcus strains. Furthermore, the extract’s MIC value for the Candida species was determined to be 4.81 mg/mL. The weakest antibacterial effect was observed against S. infantis, although activity against the Salmonella species was also noted.
The antioxidant activity of A. scorodoprasum subsp. jajlae was assessed using the DPPH radical scavenging method, and the results are presented in Table 6. The DPPH radical scavenging assay revealed the EC50 value for A. scorodoprasum subsp. jajlae was 0.4940 mg/mL. The Pearson correlation analysis for the A. scorodoprasum subsp. jajlae DPPH scavenging activity revealed a very high positive correlation with a coefficient of r = 0.9783, indicating that the scavenging activity increases with the concentration.
In this study, the effects of A. scorodoprasum subsp. jajlae extract on the growth of the tested microorganisms’ biofilms were investigated, and their Pearson correlation coefficients were computed to determine the relationship between the biofilm formations and extract concentrations (Table 7). According to the Pearson correlation coefficients, it can be inferred that increasing the extract concentration enhances the production of biofilms for L. innocua, B. subtilis DSMZ 1971, and E. coli (MDR). On the other hand, a biofilm-inhibiting effect was observed for E. coli ATCC 25922.
The chemical composition of the A. scorodoprasum subsp. jajlae ethanol extract was analyzed using gas chromatography–mass spectrometry (GC-MS). The main components accounting for more than 0.5% of the chemical content were considered significant and are presented in Table 8. The GC-MS results revealed the presence of 28 distinct compounds in the plant extract, with linoleic acid, palmitic acid, and octadecanoic acid 2,3-dihydroxypropyl ester being the predominant components of the ethanol extract.

4. Discussion

Cardiovascular diseases remain the leading cause of mortality worldwide, accounting for 31% of all deaths, with infectious diseases ranking as the second most common cause of mortality at 17% [38]. S. aureus is a major human pathogen responsible for various illnesses, including life-threatening conditions such as pneumonia, endocarditis, osteomyelitis, skin and soft tissue infections, and bacteremia. As such, the development of novel antimicrobial agents effective against Staphylococcus species, which contribute to increased hospital mortality rates and pose significant public health threats, is of paramount importance [38]. Our findings are in line with those of previous studies reporting the antimicrobial activity of Allium species against Staphylococcus species [39,40].
The ethanol extract of A. scorodoprasum subsp. jajlae demonstrated significant antimicrobial activity against various Staphylococcus strains, including methicillin-resistant S. aureus (MRSA) and multidrug-resistant (MRSI + MDR) S. aureus, as well as S. epidermidis DSMZ 20044. This is particularly noteworthy given the increasing prevalence of drug-resistant infections and the associated public health concerns. The considerable antimicrobial activity displayed by the A. scorodoprasum subsp. jajlae extract against S. aureus strains, particularly the MRSA and MDR strains, highlights its potential as an alternative therapeutic agent against these multidrug-resistant pathogens.
Salmonella typically presents with fever, abdominal pain, nausea, diarrhea, and occasionally vomiting, with more severe complications in some cases. It is the most common microorganism responsible for foodborne infections [41]. In this study, effects were observed against three Salmonella strains, two of which were food isolates, highlighting the importance of prevention against these bacteria.
High mortality rates are attributed to fungi such as Candida species, which continue to be a significant health concern [42]. A. scorodoprasum subsp. jajlae extract demonstrated antifungal activity against two of the three tested Candida species. This effect is believed to be supported by the antifungal agent Elemicin, which was identified in the GC-MS analysis [30].
Reactive oxygen species (ROS) contribute to complications associated with oxidative stress, and the detrimental effects of ROS can be neutralized by antioxidants. As synthetic antioxidants have adverse effects on human health, scientists are seeking novel antioxidant sources without harmful consequences. The primary aim of the present study is to investigate the antioxidant activity of A. scorodoprasum subsp. jajlae using DPPH. It has been reported that A. scorodoprasum is a potent DPPH scavenger [43]. Additionally, methyleugenol and vanillin, identified in the GC-MS analysis, are known for their antioxidant activities.
Our findings on the antimicrobial, antioxidant, and antibiofilm properties of A. scorodoprasum subsp. jajlae differ in some aspects from those reported by Ðordevski et al. [37] for the closely related taxon, A. scorodoprasum L. flower extract. The chemical composition of A. scorodoprasum subsp. jajlae in our study, as determined by the GC-MS analysis, identified linoleic acid, palmitic acid, and octadecanoic acid 2,3-dihydroxypropyl ester as the major compounds in the ethanol extract. In contrast, Ðordevski et al. [44] found flavonoids, such as rutin and kaempferol 3-O-glucoside, to be the most abundant compounds in the extracts of A. scorodoprasum L. flowers.
The differences in chemical composition between our study on A. scorodoprasum subsp. jajlae and Ðordevski et al.’s study [44] on A. scorodoprasum L. flowers could stem from several factors. One contributing factor is the variation in plant material, as our study investigated the whole plant of A. scorodoprasum subsp. jajlae, while Ðordevski et al. focused on the flowers of the closely related but distinct taxon, A. scorodoprasum L. Additionally, variations in extraction solvents and environmental conditions may also influence the differences observed in the chemical composition of the respective plant extracts.
Our investigation of the antimicrobial activity of A. scorodoprasum subsp. jajlae against various bacterial and Candida species revealed strong activity against S. aureus strains, including methicillin-resistant and multidrug-resistant strains, as well as C. tropicalis and C. glabrata. In comparison, Ðordevski et al. [44] found that ethanol-containing and water extracts were more efficient against fungi, while butanol-containing extracts had a better effect on the growth inhibition of bacteria. Furthermore, their study reported significant antibiofilm activity against Staphylococcus lugdunensis biofilms. These distinctions between the two studies’ findings may provide valuable insights for future research into the development of novel antimicrobial, antioxidant, and antibiofilm agents derived from A. scorodoprasum and its subspecies.
According to Mollica et al. [43], the flower extract of A. scorodoprasum exhibited a higher scavenging activity of 34.83 mg TE/g extract on DPPH radicals. In comparison, as shown in Table 6, the scavenging activity of A. scorodoprasum subsp. jajlae extract increased with increases in concentration, reaching a maximum of 38.118% at 200 µg/mL. This difference in antioxidant activity could be attributed to variations in the phenolic content between the two subspecies. The flower extract of A. scorodoprasum was found to be rich in phenolic compounds, including rosmarinic acid, p-hydroxybenzoic acid, and protocatechuic acid [43]. These compounds have been reported to exhibit antioxidant activity in various assays. In contrast, the phenolic composition of A. scorodoprasum subsp. jajlae might differ, leading to variations in the observed antioxidant activities.
Dehpour et al. [45] reported on the chemical composition and antibacterial properties of essential oils obtained from the flowers of A. rotundum L., an important wild Allium species in Iran. Their GC-MS analysis identified 54 compounds, representing 68% of the total oil. The major compounds identified were different from those found in our study, which focused on A. scorodoprasum subsp. jajlae. Moreover, the antibacterial activity of A. rotundum essential oils was evaluated against Proteus mirabilis, Enterobacter cloacae, Klebsiella pneumonia,e Staphylococcus aureus, and Bacillus subtilis, and showed inhibition at concentrations of <1/200 (v/v). In our study, A. scorodoprasum subsp. jajlae ethanol extract displayed antimicrobial activity against several bacteria, including Staphylococcus, Salmonella, and Candida species. The differences in the chemical compositions and antimicrobial activities between the two Allium species highlight the importance of investigating various Allium species and their potential applications in combating infectious diseases.
The study findings revealed that 12 of the identified compounds have biological activity, as previously reported in other research. The observed antibacterial, antifungal, and antioxidant activities are supported by compounds with known properties. Further tests at the compound level are required to determine the effects of substances for which no known effect exists and to establish whether the compounds producing the observed effects act alone or in combination with other substances. Based on the results obtained from the study, it is not possible to determine the potency of the observed effects due to the fact that they originate from the extracts rather than isolated compounds. Therefore, in future studies, it is essential to perform purification processes to individually assess the potency of each compound, ensuring a comprehensive understanding of their activity. This approach will contribute to the overall understanding of the mechanisms and potential applications of these compounds in various settings.
In the field of systematics, conducting studies on the biochemical composition and bioactivity of species that have faced or may face challenges in the past or future can indirectly shed light on their systematic research. By doing so, these studies will provide valuable data that can be utilized to reveal the differences among species and support the understanding of their distinctions in a more comprehensive manner. While the primary focus of this research is on biochemical composition and bioactivity effects, it also offers a secondary benefit by indirectly contributing to the advancement of systematics.

5. Conclusions

This study demonstrated the potential antimicrobial, antifungal, and antioxidant activities of A. scorodoprasum subsp. jajlae ethanol extract against some microorganisms, including standard, food isolate, and multidrug-resistant strains. The observed activities are supported by the presence of biologically active compounds identified through a GC-MS analysis. However, further research is necessary to elucidate the exact mechanisms behind these observed effects. Future studies should focus on the purification of individual compounds, as well as determining whether the observed activities are a result of single compounds or synergistic interactions between multiple constituents. This information will contribute to a better understanding of the potential therapeutic applications of A. scorodoprasum subsp. jajlae and its constituents in the development of novel antimicrobial, antifungal, and antioxidant agents.

Author Contributions

Conceptualization, K.C. and E.M.A.; data analysis, A.B., D.T., M.E.B., Ö.S., K.C. and E.M.A.; methodology, A.B., D.T., M.E.B., K.C. and E.M.A.; investigation, A.B., D.T., M.E.B., Ö.S., K.C. and E.M.A.; writing—original draft preparation, K.C. and D.T.; writing—review and editing, E.M.A.; supervision, K.C. and E.M.A.; project administration, K.C.; funding acquisition, K.C. All authors have read and agreed to the published version of the manuscript.

Funding

This research was funded by Dokuz Eylül University Scientific Research Coordination Unit, project number 2019.KB.FEN.014.

Institutional Review Board Statement

Not applicable.

Informed Consent Statement

Not applicable.

Data Availability Statement

All data that were generated or analyzed during this study have been included in this published article.

Conflicts of Interest

The authors declare no conflict of interest.

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Table 1. Antimicrobial susceptibility of standard strains assessed by disc diffusion method.
Table 1. Antimicrobial susceptibility of standard strains assessed by disc diffusion method.
Microorganisms50 µL100 µL200 µLr-Value *GEN (10 µg)
Candida albicans DSMZ 13860.00 ± 0.000.00 ± 0.000.00 ± 0.00-12
Escherichia coli ATCC 259220.00 ± 0.000.00 ± 0.000.00 ± 0.00-22
Listeria monocytogenes ATCC 76440.00 ± 0.000.00 ± 0.000.00 ± 0.00-28
Pseudomonas aeruginosa DSMZ 500710.00 ± 0.000.00 ± 0.000.00 ± 0.00-15
Salmonella enteritidis ATCC 130760.00 ± 0.008.00 ± 0.008.00 ± 0.580.75621
Staphylococcus aureus ATCC 259238.00 ± 0.0011.00 ± 0.5812.00 ± 0.580.89121
Staphylococcus epidermidis DSMZ 200449.00 ± 0.5810.00 ± 0.0011.00 ± 0.000.98222
Data presented as mean values ± standard errors (inhibition zone diameters in mm); * Pearson correlation coefficient; GEN: Gentamicin; DSMZ: Deutsche Sammlung von Mikroorganismen und Zellkulturen; ATCC: American Type Culture Collection.
Table 2. Antimicrobial susceptibility of food isolate strains assessed by disc diffusion method.
Table 2. Antimicrobial susceptibility of food isolate strains assessed by disc diffusion method.
Microorganisms50 µL100 µL200 µLr-Value *GEN (10 µg)
Enterococcus durans0.00 ± 0.000.00 ± 0.000.00 ± 0.00-11
Enterococcus faecium0.00 ± 0.007.00 ± 0.007.00 ± 0.000.75628
Klebsiella pneumoniae0.00 ± 0.000.00 ± 0.000.00 ± 0.00-19
Listeria innocua0.00 ± 0.007.00 ± 0.008.00 ± 0.000.82613
Salmonella infantis8.00 ± 0.008.00 ± 0.008.00 ± 0.58-17
Salmonella kentucky7.00 ± 0.008.00 ± 0.009.00 ± 0.580.98212
Data presented as mean values ± standard errors (inhibition zone diameters in mm); * Pearson correlation coefficient; GEN: Gentamicin.
Table 3. Antimicrobial susceptibility of clinical isolate strains assessed by disc diffusion method.
Table 3. Antimicrobial susceptibility of clinical isolate strains assessed by disc diffusion method.
Microorganisms50 µL100 µL200 µLr-Value *GEN (10 µg)
Streptococcus mutans8.00 ± 0.0010.00 ± 0.5811.00 ± 0.580.88222
Staphylococcus lugdunensis0.00 ± 0.000.00 ± 0.000.00 ± 0.00-17
Acinetobacter baumannii0.00 ± 0.000.00 ± 0.000.00 ± 0.00-18
Shigella flexneri0.00 ± 0.000.00 ± 0.000.00 ± 0.00-16
Klebsiella pneumoniae0.00 ± 0.000.00 ± 0.000.00 ± 0.00-18
Candida tropicalis8.00 ± 0.0011.00 ± 0.0013.00 ± 0.000.954-
Candida glabrata10.00 ± 0.0010.00 ± 0.5811.00 ± 0.000.8377
Data presented as mean values ± standard errors (inhibition zone diameters in mm) * Pearson correlation coefficient; GEN: Gentamicin.
Table 4. Antimicrobial susceptibility of MDR strains assessed by disc diffusion method.
Table 4. Antimicrobial susceptibility of MDR strains assessed by disc diffusion method.
Microorganisms50 µL100 µL200 µLr-Value *GEN (10 µg)
Klebsiella pneumoniae0.00 ± 0.000.00 ± 0.000.00 ± 0.00-8
Acinetobacter baumannii0.00 ± 0.000.00 ± 0.000.00 ± 0.00-15
Streptococcus pneumonia0.00 ± 0.000.00 ± 0.000.00 ± 0.00-11
Staphylococcus aureus MRSA11.00 ± 0.0012.00 ± 0.0012.00 ± 0.580.80310
Staphylococcus aureus MRSA + MDR10.00 ± 0.0010.00 ± 0.5810.00 ± 0.580.285-
Providencia rustigianii0.00 ± 0.000.00 ± 0.000.00 ± 0.00 22
Data presented as mean values ± standard errors (inhibition zone diameters in mm) * Pearson correlation coefficient; GEN: Gentamicin; MRSA: Methicillin-resistant S. aureus; MDR: Multi-drug resistance.
Table 5. Minimum inhibitory concentration (MIC) test results.
Table 5. Minimum inhibitory concentration (MIC) test results.
MicroorganismsMIC (mg/mL)
Salmonella enteritidis ATCC 130769.62
Staphylococcus aureus ATCC 259234.81
Staphylococcus epidermidis DSMZ 200444.81
Enterococcus faecium (FI).
Listeria innocua (FI).
Salmonella infantis (FI)19.25
Salmonella kentucky (FI)9.62
Staphylococcus aureus MRSA4.81
Staphylococcus aureus MRSA+MDR4.81
Streptococcus mutans (CI)9.62
Candida tropicalis (CI)4.81
Candida glabrata (CI)4.81
CI: Clinical isolate, FI: Food isolate, MDR: Multidrug resistance, MRSA: Methicillin resistance S. aureus.
Table 6. DPPH radical scavenging activity results.
Table 6. DPPH radical scavenging activity results.
Concentration (µg/mL))ASJ (%)AA (%)
200.00038.11894.665
100.00020.78193.391
50.00014.43092.077
25.00013.14290.086
12.5005.69269.943
6.2504.50735.794
3.1251.43017.698
1.0750.8968.739
ASJ: A. scorodoprasum subsp. jajlae scavenging AA: Ascorbic acid scavenging.
Table 7. Pearson Correlation Coefficients for Antibiofilm Activity.
Table 7. Pearson Correlation Coefficients for Antibiofilm Activity.
MicroorganismsPearson Correlation Coefficient
E. coli (MDR)0.923479464
E. coli ATCC 25922−0.534721723
L. innocua0.973313903
L. monocytogenes0.264206475
B. subtilis DSMZ 19710.740007835
Table 8. GC-MS Analysis of A. scorodoprasum subsp. jajlae Ethanol Extract Components.
Table 8. GC-MS Analysis of A. scorodoprasum subsp. jajlae Ethanol Extract Components.
NoRTChemical StructuresCompound NameFormulaMW (g/mol)Area (%)Known Activity
120.943Cimb 45 00316 i001D-CarvoneC10H14O150.2180.58Anti-inflammatory and protective effects [24]
223.502Cimb 45 00316 i0022-Methoxy-4-vinylphenolC9H10O2150.1740.61Anti-inflammatory effect [25]
326.375Cimb 45 00316 i003VanillinC8H8O3152.1470.66Anticancer and antioxidant activity [26,27]
426.462Cimb 45 00316 i004MethyleugenolC11H14O2178.2281.02Antioxidant, antimicrobial, genotoxicity, and herbicidal activities [28]
529.892Cimb 45 00316 i005MyristicinC11H12O3192.2113.15Insecticidal activity [29]
631.139Cimb 45 00316 i006ElemicinC12H16O3208.2541.09Antiviral and antifungal activity [30,31]
737.749Cimb 45 00316 i007Myristic acidC14H28O2228.3711.12Antiviral activity [32]
839.746Cimb 45 00316 i008NeophytadieneC20H38278.5161.32Anti-inflammatory activity [33]
939.988Cimb 45 00316 i009Hexahydrofarnesyl acetoneC18H36O268.4780.89-
1042.317Cimb 45 00316 i0107,9-di-tert-butyl-1-oxaspiro [4.5]deca-6,9-diene-2,8-dioneC17H24O3276.3710.56-
1144.384Cimb 45 00316 i011Palmitic acidC16H32O2256.42415.01Antitumor activity [34]
1248.129Cimb 45 00316 i012PhytolC20H40O296.5311.66Antimycobacterial activity [35]
1349.504Cimb 45 00316 i013Linoleic acidC18H32O2280.44525.77Carcinogenesis and proliferative activity [36]
1450.245Cimb 45 00316 i014Stearic acidC18H36O2284.4773.68Synthesis, antidepressant, and antimicrobial activities [37]
1556.502Cimb 45 00316 i015Arachidic acidC20H40O2312.5301.14-
1660.745Cimb 45 00316 i016IcosaneC20H42282.5471.16-
1761.185Cimb 45 00316 i0172-PalmitoylglycerolC19H38O4330.5031.32-
1867.583Cimb 45 00316 i018DocosaneC22H46310.6016.30-
1968.335Cimb 45 00316 i019Octadecanoic acid 2,3-dihydroxypropyl esterC21H42O4358.5567.23-
2074.184Cimb 45 00316 i020NonadecaneC19H40268.5216.11-
2178.647-Unknown--0.71-
2280.431Cimb 45 00316 i021PentacosaneC25H52352.6804.68-
2383.409-Unknown--0.88-
2485.552Cimb 45 00316 i0223-(2,3-Difluorophenyl)-6-(4-methoxyphenyl)[1,2,4]triazolo[3,4-b][1,3,4]thiadiazoleC16H10F2N4OS344.3390.58-
2586.414-Unknown--3.82-
2688.691Cimb 45 00316 i023NeophytadieneC20H38278.50.92-
2790.932-Unknown--1.41-
2894.693-Unknown--1.04-
Figures: https://pubchem.ncbi.nlm.nih.gov/ (accessed on 10 February 2023).
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Canli, K.; Turu, D.; Benek, A.; Bozyel, M.E.; Simsek, Ö.; Altuner, E.M. Biochemical and Antioxidant Properties as well as Antimicrobial and Antibiofilm Activities of Allium scorodoprasum subsp. jajlae (Vved.) Stearn. Curr. Issues Mol. Biol. 2023, 45, 4970-4984. https://doi.org/10.3390/cimb45060316

AMA Style

Canli K, Turu D, Benek A, Bozyel ME, Simsek Ö, Altuner EM. Biochemical and Antioxidant Properties as well as Antimicrobial and Antibiofilm Activities of Allium scorodoprasum subsp. jajlae (Vved.) Stearn. Current Issues in Molecular Biology. 2023; 45(6):4970-4984. https://doi.org/10.3390/cimb45060316

Chicago/Turabian Style

Canli, Kerem, Dilay Turu, Atakan Benek, Mustafa Eray Bozyel, Özcan Simsek, and Ergin Murat Altuner. 2023. "Biochemical and Antioxidant Properties as well as Antimicrobial and Antibiofilm Activities of Allium scorodoprasum subsp. jajlae (Vved.) Stearn" Current Issues in Molecular Biology 45, no. 6: 4970-4984. https://doi.org/10.3390/cimb45060316

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