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Agronomy
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Alleviative Mechanisms of Rhizospheric Bacteria in the Response to Plant...
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Alleviative Mechanisms of Rhizospheric Bacteria in the Response to Plant Stress: A Promising Tool in Sustainable Agriculture

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

Deadline for manuscript submissions: closed (10 February 2022) | Viewed by 7717

Special Issue Editor

Dr. David Correa-Galeote

E-Mail Website1 Website2
Guest Editor
Department of Microbiology, University of Granada, 18071 Granada, Spain
Interests: environmental microbiology; wastewater treatment; microbial ecology; correlation networks; mixed microbial culture (MMC)
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

It is commonly recognized that intensive agriculture is leading to more frequent and intense stress situations. Furthermore, the inadequate application of agrochemicals to overcome these stresses has resulted in a vicious circle that accelerated environmental contamination. It is a universally accepted fact that the use of plant growth promoting rhizobacteria (PGPR) as inoculants improve the growth and yield of agricultural crops. Additionally, PGPR are safer and more economic alternatives to agrochemical fertilizers. Therefore, in the present scenario, the use of PGPR is of paramount importance to reduce various anthropogenic agricultural constraints. Despite the importance of PGPR in agriculture, the biochemical mechanisms by which they alleviate the effect of different stresses has not been widely studied.

This Special Issue will focus on the use of PGPR as soil management solutions to cope with different biotic and abiotic stresses. We are open to novel research, reviews, and opinion articles covering all aspects of the responses and mechanisms developed by PGPR to alleviate the detrimental effects of biotic and abiotic stress in crops. Contributions of biochemical and molecular studies on the responses to abiotic stress by PGPR will be an essential part of this Special Issue. Genetic engineering and other biotechnological approaches to improve PGPR stress tolerance are also welcome.

Dr. David Correa-Galeote
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

  • Plant growth promoting rhizobacteria
  • Rhizosphere
  • Bacterial inoculants
  • Sustainable agriculture
  • Crop yield
  • Abiotic stress
  • Drought
  • Salinity
  • Nitrogen fixation
  • ACC-deaminase
  • Siderophores
  • Phosphate-solubilisation
  • Genetic engineering
  • Biotechnology

Published Papers (2 papers)

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Research

21 pages, 16475 KiB  
Article
Biocontrol of Macrophomina phaseolina Using Bacillus amyloliquefaciens Strains in Cowpea (Vigna unguiculata L.)
by Edelweiss Airam Rangel-Montoya, Carmen Sanjuana Delgado-Ramírez, Edgardo Sepulveda and Rufina Hernández-Martínez
Agronomy 2022, 12(3), 676; https://doi.org/10.3390/agronomy12030676 - 11 Mar 2022
Cited by 14 | Viewed by 5216
Abstract
The fungus Macrophomina phaseolina is the causal agent of charcoal rot in many crops, such as strawberries and beans. Symptoms include stem and root rot and chlorotic foliage. This disease’s management is complicated because the pathogen forms resistant microsclerotia. This work aimed to [...] Read more.
The fungus Macrophomina phaseolina is the causal agent of charcoal rot in many crops, such as strawberries and beans. Symptoms include stem and root rot and chlorotic foliage. This disease’s management is complicated because the pathogen forms resistant microsclerotia. This work aimed to obtain bacterial isolates for the biocontrol of M. phaseolina in arid regions. Two strains that grew well under low pH and high salinity, named BsA3MX and BsC11MX, were isolated and identified as B. amyloliquefaciens, based on their morphology and analysis of the 16S ribosomal RNA. Both strains inhibited M. phaseolina up to 66.8% in vitro through the combined action of volatile and diffusible compounds. Furthermore, they produce siderophores and indole-3-acetic acid (IAA), have ACC-deaminase activity, solubilize phosphate and zinc, and decrease microsclerotia germination. Moreover, in greenhouse assays using cowpea plants (Vigna unguiculata L.), strain BsA3MX reduced lesions caused by M. phaseolina and induced a significant increase in foliage and root biomass. Overall, these results suggest B. amyloliquefaciens BsA3MX and BsC11MX can be used as biological control agents against M. phaseolina in arid zones. Full article
(This article belongs to the Special Issue Alleviative Mechanisms of Rhizospheric Bacteria in the Response to Plant Stress: A Promising Tool in Sustainable Agriculture)
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12 pages, 23413 KiB  
Article
Efficacy of New Local Bacterial Agents against Pyrenophora tritici-repentis in Kuban Region, Russia
by Anzhela Asaturova, Natalya Zhevnova, Natalya Tomashevich, Marina Pavlova, Oksana Kremneva, Galina Volkova and Nikita Sidorov
Agronomy 2022, 12(2), 373; https://doi.org/10.3390/agronomy12020373 - 01 Feb 2022
Cited by 8 | Viewed by 1797
Abstract
The phytopathogenic fungus Pyrenophora tritici-repentis is a causal agent of tan spot. Antagonistic microorganisms can be used as a non-chemical alternative treatment against the tan spot of wheat. Bacillus velezensis BZR 336 g and BZR 517 stains were selected as the most active [...] Read more.
The phytopathogenic fungus Pyrenophora tritici-repentis is a causal agent of tan spot. Antagonistic microorganisms can be used as a non-chemical alternative treatment against the tan spot of wheat. Bacillus velezensis BZR 336 g and BZR 517 stains were selected as the most active microorganisms and potential biocontrol agents. We found that B. velezensis strains BZR 336 g and BZR 517 exhibited antagonistic activity against P. tritici-repentis Kr-15/2016 in vitro: they inhibited mycelium growth by 72.4–94.3% and caused its degenerative changes. Treatment of seeds and plants with strains BZR 336 g and BZR 517 provided a biological efficiency of 31.2–38.4% against tan spot, while artificial inoculation of plants provided only 28.4–43.8% biological efficiency. Treatment of seeds and plants with BZR 336 g and BZR 517 in a three-year field trial demonstrated 24.6–50% biological efficiency. BZR 336 g and BZR 517 provided 5.0–7.6% additional yield. We conclude that BZR 336 g and BZR 517 are promising options for novel bioproducts that can control P. tritici-repentis tan spot. Full article
(This article belongs to the Special Issue Alleviative Mechanisms of Rhizospheric Bacteria in the Response to Plant Stress: A Promising Tool in Sustainable Agriculture)
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