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Agronomy
Special Issues
MicroRNA Mediated Responses to Environmental Stress in Crop Plants
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MicroRNA Mediated Responses to Environmental Stress in Crop Plants

A special issue of Agronomy (ISSN 2073-4395). This special issue belongs to the section "Crop Breeding and Genetics".

Deadline for manuscript submissions: closed (10 March 2022) | Viewed by 3168

Special Issue Editor

Dr. Andrew Eamens

E-Mail Website
Guest Editor
Centre for Plant Science, School of Environmental and Life Sciences, University of Newcastle, Callaghan, NSW 2308, Australia
Interests: RNA biology; RNA silencing; small RNA biology; microRNAs; environmental stress; molecular breeding; agricultural biotechnology
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Plant microRNAs (miRNAs) were initially viewed as masters regulators of gene expression throughout all phases of plant development. However, it is now readily apparent that miRNA-mediated gene expression regulation also occupies a central role in the molecular alterations required by a plant to respond to environmental stress, be it an abiotic stress such as salinity or drought, or a biotic form of stress such as providing a defensive response against an invading pathogen. Currently, the development of new crop species with enhanced resistance to environmental stress while also providing elevated quality characteristics and yield potential is of paramount importance to attempt to address the ever-increasing worldwide demand for crop production. Considering the central role played by miRNA-mediated alterations to gene expression as part of the highly complex and interrelated molecular responses required by a plant to respond to environmental stress, documentation of miRNA abundance changes, or altered miRNA target gene expression, forms a fundamental first step in the development of new crop cultivars to meet the future food production demands of a growing global population. 

Thus, for this Special Issue of Agronomy, I invite primary research articles or literature reviews on miRNA-mediated responses to any form of environmental stress, and in any crop species of interest. I am especially interested in the submission of research articles which shed additional light on the actual biological mechanisms behind the molecular responses mediated by a specific miRNA and/or its target gene transcripts in crop plants to environmental stress.

Dr. Andrew Eamens
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

  • small RNAs
  • microRNAs
  • gene expression regulation
  • environmental stress adaptation
  • crop plants
  • molecular breeding

Published Papers (1 paper)

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Research

22 pages, 11915 KiB  
Article
Molecular Manipulation of the MiR396/GRF Expression Module Alters the Salt Stress Response of Arabidopsis thaliana
by Joseph L. Pegler, Duc Quan Nguyen, Jackson M.J. Oultram, Christopher P.L. Grof and Andrew L. Eamens
Agronomy 2021, 11(9), 1751; https://0-doi-org.brum.beds.ac.uk/10.3390/agronomy11091751 - 31 Aug 2021
Cited by 11 | Viewed by 2682
Abstract
We previously demonstrated that microRNA396 (miR396) abundance is altered in 15-day-old Arabidopsis thaliana (Arabidopsis) whole seedlings following their exposure to a 7-day salt stress treatment regime. We, therefore, used a molecular modification approach to generate two new Arabidopsis transformant populations with [...] Read more.
We previously demonstrated that microRNA396 (miR396) abundance is altered in 15-day-old Arabidopsis thaliana (Arabidopsis) whole seedlings following their exposure to a 7-day salt stress treatment regime. We, therefore, used a molecular modification approach to generate two new Arabidopsis transformant populations with reduced (MIM396 plants) and elevated (MIR396 plants) miR396 abundance. The exposure of 8-day-old wild-type Arabidopsis whole seedlings and a representative plant line of the MIM396 and MIR396 transformant populations to a 7-day salt stress treatment regime revealed unique phenotypic and physiological responses to the imposed stress by unmodified wild-type Arabidopsis plants and the MIM396 and MIR396 transformat lines. A quantitative reverse transcriptase polymerase chain reaction (RT-qPCR) approach was, therefore, applied to demonstrate that the plant line specific responses to salt stress likely stemmed from the unique molecular profile of each of the GROWTH REGULATING FACTOR (GRF) transcription factor gene family members which form posttranscriptional targets of miR396-directed expression regulation. RT-qPCR additionally revealed that, in 15-day-old Arabidopsis whole seedlings, the three previously identified putative target genes of miR396 belonging to the NEUTRAL/ALKALINE NONLYSOSOMAL CERAMIDASE-LIKE (NCER) gene family, including NCER1, NCER2, and NCER3, do not form targets of miR396-directed expression regulation at the posttranscriptional level. Taken together, the phenotypic and molecular analyses presented here demonstrate that alteration of the miR396/GRF expression module is central to the molecular response of Arabidopsis to salt stress. Full article
(This article belongs to the Special Issue MicroRNA Mediated Responses to Environmental Stress in Crop Plants)
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