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Agronomy
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Biostimulants in Plant Growth Promotion and Stress Protection in Crops
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Biostimulants in Plant Growth Promotion and Stress Protection in Crops

A special issue of Agronomy (ISSN 2073-4395). This special issue belongs to the section "Horticultural and Floricultural Crops".

Deadline for manuscript submissions: closed (31 January 2024) | Viewed by 4600

Special Issue Editor

Dr. Elżbieta Wszelaczyńska

E-Mail Website
Guest Editor
Institute of Microbiology and Food Technology, University of Science and Technology, 7 Kaliskiego St., 85-796 Bydgoszcz, Poland
Interests: biostimulants; biostimulant application; plant development

Special Issue Information

Dear Colleagues,

The use of plant biostimulants has become common practice in agriculture and provides a huge number of benefits in terms of stimulating growth and protecting against stress. The biostimulator is used to increase nutrient absorption, stimulate growth, increase stress tolerance, or improve crop quality. The use of biostimulants, i.e., substances that promote plant growth and resistance, seems to be the most effective way of achieving satisfactory effects. Biostimulants are part of the modern plant industry and environmentally friendly crop management as they improve the quality of crops while reducing chemical inputs. This Special Issue aims to demonstrate the unique properties of various biostimulants, which have a profound effect on the properties of crops and fiber plants.

In this Special Issue, research articles, reviews, and opinion-forming articles on biostimulants, plant growth, protection against stress, and biostimulants promoting plant growth are welcome. All kinds of manuscripts are welcome, including original research papers, research concepts, news, and reviews.

Dr. Elżbieta Wszelaczyńska
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Agronomy is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Published Papers (4 papers)

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Research

19 pages, 3780 KiB  
Article
Influence of Edible Potato Production Technologies with the Use of Soil Conditioner on the Nutritional Value of Tubers
by Katarzyna Gościnna, Katarzyna Retmańska, Elżbieta Wszelaczyńska and Jarosław Pobereżny
Agronomy 2024, 14(3), 549; https://doi.org/10.3390/agronomy14030549 - 07 Mar 2024
Viewed by 593
Abstract
The aim of this study was to determine the effect of the application of different organic matter, UGmax soil conditioner and simplifications in potato cultivation on the content of dry matter, starch and sugars in tubers of the medium-early edible cultivar ‘Satina’ after [...] Read more.
The aim of this study was to determine the effect of the application of different organic matter, UGmax soil conditioner and simplifications in potato cultivation on the content of dry matter, starch and sugars in tubers of the medium-early edible cultivar ‘Satina’ after harvest and after long-term storage. The highest dry matter (173.4 g kg−1) and starch (124.6 g kg−1 f. m.) content was obtained with the simultaneous application of a manure with soil conditioner at 100% mineral fertilization. In the case of sugars, the withdrawal of the soil conditioner from the crop proved most beneficial, for total sugars on the stubble intercrop (5.06 g kg−1 f. m.) and for reducing sugars (1.99 g kg−1 f. m.) in the case of straw treatment. Each protection reduction applied resulted in a significant reduction in starch content. In this regard, the withdrawal of herbicides with the simultaneous application of manure and UGmax proved most beneficial. Long-term storage of tubers caused a significant reduction in their quality in terms of dry matter and starch content (average by −3.6 and −2.3%, respectively) and an increase in total and reducing sugars (average by 11.8 and 9.6%, respectively). The decrease in dry matter and starch content was significantly influenced by the 50% reduction in NPK fertilization applied during the growing season, while the application of soil conditioner with full protection contributed to the increase in reducing sugars after storage at 28.9 pts%. Our research is in line with current trends of used potato cultivation technologies focused mainly on environmental protection, so the results of this study can provide a basis for validation for researchers currently engaged in such evaluation. Full article
(This article belongs to the Special Issue Biostimulants in Plant Growth Promotion and Stress Protection in Crops)
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19 pages, 5376 KiB  
Article
Gamma-Aminobutyric Acid-Mediated Alkalinity Stress Alleviation in Lollo Rosso Lettuce under Diverse Light Spectra
by Shima Mirzaei, Shirin Moradi, Morteza Karimi, Sara Esmaeili, Nazim S. Gruda and Sasan Aliniaeifard
Agronomy 2024, 14(2), 313; https://doi.org/10.3390/agronomy14020313 - 31 Jan 2024
Viewed by 703
Abstract
The agricultural sector faces challenges due to climate change and the growing global population. Alkaline stress could adversely impact plant growth and crop production. This stressor diminishes water quality essential for crop cultivation, consequently impairing plant growth and overall productivity. Gamma-aminobutyric acid (GABA), [...] Read more.
The agricultural sector faces challenges due to climate change and the growing global population. Alkaline stress could adversely impact plant growth and crop production. This stressor diminishes water quality essential for crop cultivation, consequently impairing plant growth and overall productivity. Gamma-aminobutyric acid (GABA), a non-protein amino acid, may exhibit multifaceted roles in plant responses to adverse environmental conditions. Optimization of crop production in controlled environmental agriculture under artificial light attracted much attention. In the present study, we investigated the effects of different light spectra and GABA concentrations on Lollo Rosso lettuce plants under alkaline stress. Seedlings were placed under different light spectra [red (R), blue (B), white (W), 3R:1B, and 2R:1B:1far red (FR)] and treated with GABA (0 and 50 µmol). Alkaline conditions were instituted by applying NaHCO3 at a concentration of 40 mM. The experiment incorporated a control treatment without NaHCO3. In general, R light exposure caused the highest growth performance of lettuce plants. GABA augmented biomass production in control and alkaline-treated plants across all light spectra. Additionally, it increased the concentrations of photosynthetic and protective pigments under alkaline conditions. GABA also improved the photosynthetic performance under all light spectra. Non-photochemical quenching and pigmentation were enhanced by exposure to B light, especially in plants treated with GABA. Alkaline stress induced an increase in soluble carbohydrate content in the lettuce leaves. These findings highlight the support of GABA application in facilitating coping plants to alkaline stress. Full article
(This article belongs to the Special Issue Biostimulants in Plant Growth Promotion and Stress Protection in Crops)
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25 pages, 4951 KiB  
Article
Polyphenolic Acid Changes in Stem Cuttings of Rosa Cultivars in Relation to Phenological Stage and Rooting Enhancers
by Marta Joanna Monder and Andrzej Pacholczak
Agronomy 2023, 13(5), 1405; https://doi.org/10.3390/agronomy13051405 - 19 May 2023
Cited by 3 | Viewed by 1072
Abstract
Biostimulants and rooting enhancers, i.e., auxins, affect many aspects of plant development. The experiment in this paper focused on the response of single-node rose semi-woody cuttings to rhizogenesis-enhancing preparations based on plant extracts in terms of changes in polyphenolic acid content. The shoots [...] Read more.
Biostimulants and rooting enhancers, i.e., auxins, affect many aspects of plant development. The experiment in this paper focused on the response of single-node rose semi-woody cuttings to rhizogenesis-enhancing preparations based on plant extracts in terms of changes in polyphenolic acid content. The shoots were cut at four stages of flowering development: (i) flower buds closed, (ii) open flower, (iii) immediately after petal shedding, (iv) 7–14 days after petal shedding. The experimental material consisted of six old, once-flowering rose cultivars (‘Duchesse d’Angoulême’, ‘Hurdals’, ‘Maiden’s Blush’, ‘Mousseuse Rouge’, Rosa beggeriana ‘Polstjårnan’, R. helenae ‘Semiplena’). The following rooting-enhancers were applied: commercial powder containing (i) 0.4% indolebutyric acid (IBA) or (ii) 0.2% naphthalene acetic acid (NAA) or commercial plant-extract mixtures named in the experiment, i.e., (iii) Seaweed Preparation, (iv) Humic Preparation, and (v) Plant Preparation, and (vi) the control cuttings, which remained untreated. The level of polyphenolic acids was determined before and after rooting. The content of polyphenolic acids had a tendency to decrease during the period of rhizogenesis for all cultivars and all phenological stages. Changes in polyphenolics were affected by all the rooting enhancers, but the contents of these compounds before and after rooting was not found to unambiguously correlate with either the final rooting percentage or quality of cuttings. Full article
(This article belongs to the Special Issue Biostimulants in Plant Growth Promotion and Stress Protection in Crops)
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16 pages, 2197 KiB  
Article
Physiological Response of Pea (Pisum sativum L.) Plants to Foliar Application of Biostimulants
by Ewa Szpunar-Krok
Agronomy 2022, 12(12), 3189; https://doi.org/10.3390/agronomy12123189 - 15 Dec 2022
Cited by 2 | Viewed by 1688
Abstract
The use of biostimulants in crop production can be an economically viable option for farmers and enable them to meet the increasing quality standards of agricultural products and consumer expectations for sustainability and environmental protection. The aim of this study was to determine [...] Read more.
The use of biostimulants in crop production can be an economically viable option for farmers and enable them to meet the increasing quality standards of agricultural products and consumer expectations for sustainability and environmental protection. The aim of this study was to determine the effect of foliar application of biostimulants on the course of physiological processes in pea (Pisum sativum L.) plants. Field studies with conventional fertilizers/biostimulants of plant origin (N1) and an ecological biostimulant of animal origin (N2) in the cultivation of eight pea varieties were carried out in the years 2015–2017 in south-eastern Poland. With favorable weather conditions during the flowering and pod setting period, as a result of N1 and N2 fertilization, in the BBCH 65 and BBCH 79 phases, there was a significant increase in the relative Chl content, Chl fluorescence parameters (Fv/Fm, Fv/F0, PI) and gas exchange (Pn, E, gs), measured in pea bracts. The relative content of Chl and the course of physiological processes in the plant were more favorably affected by N1 fertilization. Our data also confirm the beneficial effect of N2 application, but weaker than N1, which was determined by the strong negative reaction of plants to N2 fertilization in 2016, with rainfall shortages in the flowering and pod development phases. The experiment showed that in favorable weather conditions the applied foliar preparations have a positive effect on the physiological processes occurring in the plant, but in drought conditions they do not significantly mitigate its negative effects. Full article
(This article belongs to the Special Issue Biostimulants in Plant Growth Promotion and Stress Protection in Crops)
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