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Agronomy
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Abiotic Stress Responses and Microbe-Mediated Mitigation in Plants - Volume...
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Abiotic Stress Responses and Microbe-Mediated Mitigation in Plants - Volume II

A special issue of Agronomy (ISSN 2073-4395).

Deadline for manuscript submissions: closed (30 June 2024) | Viewed by 1813

Special Issue Editor

Prof. Dr. Ying Ma

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Guest Editor
Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, 3000-456 Coimbra, Portugal
Interests: plant-growth-promoting bacteria; arbuscular mycorrhizal fungi; environmental stress; plant–microbe–soil interactions; heavy metals; phytoremediation; sustainable agriculture
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue addresses plant responses to abiotic stress (e.g., drought, salinity, and extreme temperature) and the mechanisms of plant–microbe–soil interactions under stressful environmental conditions. The issue will highlight the following: (1) recent progress in fundamental research (abiotic stress-induced physiological and biochemical, metabolomic, cellular, and molecular changes in plants); (2) applied experimental studies and emerging biotechnologies that substantially enhance agricultural production and sustainability (e.g., microbe-mediated mitigation in crops).

This Special Issue welcomes contributions that dissect the underlying mechanisms of interactions among plants, beneficial microorganisms, and soils. We encourage the submission of manuscripts that focus on abiotic stress-induced molecular, cellular, and physicochemical changes in plants. The following article types are particularly welcome: original research and reviews.

Dr. Ying Ma
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–microbe–soil interaction
  • abiotic stresses
  • plant-growth-promoting microorganisms
  • plant mineral nutrition
  • plant production systems

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Published Papers (1 paper)

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Research

17 pages, 2986 KiB  
Article
Transcriptomics and Metabolomics Analysis Revealed the Ability of Microbacterium ginsengiterrae S4 to Enhance the Saline-Alkali Tolerance of Rice (Oryza sativa L.) Seedlings
by Hongfei Ji, Yuxi Qi, Xiu Zhang and Guoping Yang
Agronomy 2024, 14(4), 649; https://doi.org/10.3390/agronomy14040649 - 23 Mar 2024
Viewed by 1234
Abstract
Soil salinization is a major factor that reduces crop yields. There are some plant growth-promoting rhizobacteria (PGPR) that can stimulate and enhance the salt tolerance of plants near their roots in saline–alkali environments. Currently, there is relatively little research on PGPR in rice [...] Read more.
Soil salinization is a major factor that reduces crop yields. There are some plant growth-promoting rhizobacteria (PGPR) that can stimulate and enhance the salt tolerance of plants near their roots in saline–alkali environments. Currently, there is relatively little research on PGPR in rice saline–alkali tolerance. In the early stages of this study, a strain of Microbacterium ginsengiterrae S4 was screened that could enhance the growth of rice in a laboratory-simulated saline–alkali environment (100 mM NaCl, pH 8.5). The experiment investigated the effects of S4 bacteria on the growth, antioxidant capacity, and osmotic regulation of rice seedlings under saline–alkali stress. RNA-Seq technology was used for transcriptome sequencing and UPLC-MS/MS for metabolite detection. Research has shown that S4 bacteria affect the growth of rice seedlings under saline–alkali stress through the following aspects. First, S4 bacteria increase the antioxidant enzyme activity (SOD, POD, and CAT) of rice seedlings under saline–alkali stress, reduce the content of MDA, and balance the content of osmotic regulatory substances (soluble sugar, soluble protein, and proline). Second, under saline–alkali stress, treatment with S4 bacteria caused changes in differentially expressed genes (DEGs) (7 upregulated, 15 downregulated) and differentially metabolized metabolites (101 upregulated; 26 downregulated) in rice seedlings. The DEGs are mainly involved in UDP-glucose transmembrane transporter activity, while the differentially metabolized metabolites are mainly involved in the ABC transporters pathway. Finally, key genes and metabolites were identified through correlation analysis of transcriptomes and metabolomes, among which OsSTAR2 negatively regulates L-histidine, leading to an increase in L-histidine content. Furthermore, through gene correlation and metabolite correlation analysis, it was found that OsWRKY76 regulates the expression of OsSTAR2 and that L-histidine also causes an increase in 2-methyl-4-pentenoic acid content. Based on the above analysis, the addition of S4 bacteria can significantly improve the tolerance of rice in saline–alkali environments, which has a great application value for planting rice in these environments. Full article
(This article belongs to the Special Issue Abiotic Stress Responses and Microbe-Mediated Mitigation in Plants - Volume II)
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