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Agronomy
Special Issues
Plant-Microbe Interactions for Yield Improvement: From Greenhouse to the Field
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Plant-Microbe Interactions for Yield Improvement: From Greenhouse to the Field

A special issue of Agronomy (ISSN 2073-4395). This special issue belongs to the section "Farming Sustainability".

Deadline for manuscript submissions: closed (1 August 2021) | Viewed by 4475

Special Issue Editor

Dr. Rosa Porcel

E-Mail Website
Guest Editor
Institute for Plant Molecular and Cellular Biology (CSIC), Universitat Politècnica de València, Valencia, Spain
Interests: abiotic stress tolerance; drought; salinity; potassium transport; arbuscular mycorrhizal symbiosis; science communication
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In recent times, there have been significant advances in our knowledge of plant–microbe interactions. It is well known that plant-growth-promoting rhizobacteria (PGPR) and mycorrhizal fungi can promote plant growth and enhance the nutrition and yield of crops, due to the complex network of interactions in the soil between plants and fungi or bacteria. In addition, much is known about biostimulants, which are derived from microorganisms, among other origins. Use of PGPR, mycorrhizal fungi or biostimulants is a good strategy to cope with the effects of climate change and increasing aridity throughout the world. These techniques are also compatible with organic, integrative and low-input agriculture, in which farmers do not have many tools available.

Therefore, there is a growing interest in developing novel applications using these techniques to increase yield and diminish the effects of abiotic stress on crops.

In this Special Issue, we welcome papers focused on the following:

  • Papers describing novel applications of PGPR, mycorrhizal fungi or other biostimulants on crops under optimal or stress conditions;
  • Papers describing the molecular mechanism of action of PGPR, mycorrhizal fungi or other biostimulants on crops under optimal or stress condition;
  • Papers describing field trials in which PGPR, mycorrhizal fungi or other biostimulants have been used;
  • Papers describing novel genotypes of PGPR or mycorrhizal fungi;
  • Papers describing novel organisms with plant-growth-promoting activity;
  • Metabolomic, proteomic or genomic studies on PGPR or mycorrhizal fungi.
  • Novel biostimulants.

Dr. Rosa Porcel
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.

Keywords

  • PGPR
  • arbuscular mycorrhizal fungi
  • abiotic stress
  • biostimulant
  • plant–microbe interactions
  • genomics
  • metabolomics
  • proteomics
  • field test
  • yield

Published Papers (2 papers)

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Research

17 pages, 1595 KiB  
Article
Assessment of the Rhizosphere Bacterial Community under Maize Growth Using Various Agricultural Technologies with Biomodified Mineral Fertilizers
by Vladimir K. Chebotar, Elena P. Chizhevskaya, Evgeny E. Andronov, Nikolai I. Vorobyov, Oksana V. Keleinikova, Maria E. Baganova, Sergey N. Konovalov, Polina S. Filippova and Veronika N. Pishchik
Agronomy 2023, 13(7), 1855; https://doi.org/10.3390/agronomy13071855 - 13 Jul 2023
Cited by 1 | Viewed by 1136
Abstract
Biomodified mineral fertilizers (BMFs) were produced by enriching the ammophos fertilizer with PGPR Bacillus velezensis BS89 with the use of two technologies: BMF 1, the ammophos fertilizer with the addition of spores of Bacillus velezensis BS89 on a dry carrier (diatomite); and BMF2, [...] Read more.
Biomodified mineral fertilizers (BMFs) were produced by enriching the ammophos fertilizer with PGPR Bacillus velezensis BS89 with the use of two technologies: BMF 1, the ammophos fertilizer with the addition of spores of Bacillus velezensis BS89 on a dry carrier (diatomite); and BMF2, ammophos granules treated with spores of Bacillus velezensis BS89 in a cell suspension. The effects of BMFs on maize growth and productivity and the rhizosphere bacterial community were assessed. BMFs significantly increased maize growth, dry matter, minerals, starch and protein contents in maize grain. The application of biomodified mineral fertilizers resulted in the significant increase in the yield and some parameters of maize plants such as ear length and number of kernels in the row. The yield was increased by 7.5–7.6%, ear length by 9%, and number of kernels in the row by 6.7–7%, as compared with ammophos. However, we found no considerable differences in the composition of the bacterial community of the maize rhizosphere after the use of BMFs as compared with the use of ammophos at the level of the phyla, which was confirmed by the ecological indices of biodiversity: the Shannon index and the Simpson index. Comparison of the experimental variants with bulk soil showed differences in the microbiome composition of the dominant bacterial phyla. A greater abundance of Proteobacteria and Bacteroidetes and a lower abundance of Chloroflexi was registered in bulk soil as compared with the other experimental variants where maize plants were present. The highest percentage (5.3%) of unidentified taxonomic phyla was also found in bulk soil. Our studies showed that maize is the main structuring factor during formation of the microbiome composition in the rhizosphere. The application of biomodified fertilizers BMF1 and BMF2 considerably increased the abundance of bacteria representing the minority of the community, namely, those from the phyla Verrucomicrobia, Chloroflexi, Planctomycetes, Proteobacteria, Firmicutes and Chlamydiae, as compared with the use of ammophos. Thus, the application of biomodified mineral fertilizers is a promising agronomic and ecological strategy for boosting maize yield and the quality of grain under field conditions. Full article
(This article belongs to the Special Issue Plant-Microbe Interactions for Yield Improvement: From Greenhouse to the Field)
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18 pages, 3821 KiB  
Article
Compost Fungi Allow for Effective Dispersal of Putative PGP Bacteria
by Susett González-González, Marcia Astorga-Eló, Marco Campos, Lukas Y. Wick, Jacquelinne J. Acuña and Milko A. Jorquera
Agronomy 2021, 11(8), 1567; https://doi.org/10.3390/agronomy11081567 - 05 Aug 2021
Cited by 3 | Viewed by 2650
Abstract
Use of compost is a common agricultural practice. It improves soil fertility by adding nutrients and plant growth promoting (PGP) microorganisms. The role of bacterial-fungal interactions for compost-driven fertilization, however, is still poorly understood. In this study, we investigated whether putative PGP bacteria [...] Read more.
Use of compost is a common agricultural practice. It improves soil fertility by adding nutrients and plant growth promoting (PGP) microorganisms. The role of bacterial-fungal interactions for compost-driven fertilization, however, is still poorly understood. In this study, we investigated whether putative PGP bacteria associate to and disperse along mycelia of fungal isolates. A ‘Fungal highway column system’ was used to isolate and characterize fungal—bacterial couples derived from commercial compost (C), non-composted bulk soil (BS) and rhizosphere soil with compost application (RSC). Bacterial-fungal couples were identified by 16S and 18S rRNA gene sequencing and isolated bacteria were tested for representative PGP traits. Couples of fungi and associated migrator bacteria were isolated from C and RSC only. They included the fungal genera Aspergillus, Mucor, Ulocladium, Rhizopus and Syncephalastrum, and the bacterial genera Rhodococcus, Bacillus, Pseudomonas, Agrobacterium, Glutamicibacter and Microbacterium. Many of migrator bacteria in RSC and C showed PGP traits (e.g., tryptophane—induced auxin synthesis or phytate mineralizing activity) suggesting that fungi contained in C and RSC allow for dispersal of putative PGP bacteria. Next to being provider of nutrients, compost may therefore be source for PGP bacteria and fungal mycelia serving as networks for their efficient dispersal. Full article
(This article belongs to the Special Issue Plant-Microbe Interactions for Yield Improvement: From Greenhouse to the Field)
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