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Review article2020Peer reviewed

Biotic stress triggered small RNA and RNAi defense response in plants

Ali, Mohsin; Javaid, Ayesha; Naqvi, Sajid Hassan; Batcho, Anicet; Kayani, Waqas Khan; Lal, Aamir; Sajid, Imtiaz Ahmad; Nwogwugwu, Joy O.

Abstract

The yield of crops is largely affected by different types of biotic stresses. To minimize the damage, crop plants adapted themselves to overcome the stress conditions through gene expression reprogramming at transcriptional and post-transcriptional levels. With a better knowledge of plants' responses in adverse environments, new methodologies and strategies have been applied to develop better stress-tolerant plants. In this manner, small RNAs (micro RNA and small-interfering RNA) are reported to play a central role to combat biotic stresses in plants. Depending upon the stress stimuli, these small RNAs can up or down regulate the genes expression, that indicate their potential role in overcoming the stress. These stress-induced small RNAs may reduce the expression of the target gene(s) that might negatively influence plants' response to the adverse conditions. Contrariwise, miRNA, a class of small RNA, can downregulate its expression to upregulate the expression of the target gene(s), which might positively aid to the stress adaptation. Along with this, benefits of RNA interference (RNAi) have also been stated in functional genomic research on insects, fungi and plant pathogens. RNAi is involved in the safe transport of dsRNA to the targeted mRNA(s) in the biotic stress-causing agents (for example fungi and insects) and saves the plant from damage, which is a safer approach compared to use of chemical pesticides. The current review summarizes the role of small RNAs and the use of RNAi to save the plants from biotic stress conditions.

Keywords

Biotic stress; Down-regulation; Mechanism of dsRNA; Pest resistant; Small RNA

Published in

Molecular Biology Reports
2020, Volume: 47, number: 7, pages: 5511-5522 Publisher: SPRINGER

    Associated SLU-program

    SLU Plant Protection Network

    UKÄ Subject classification

    Biochemistry and Molecular Biology

    Publication identifier

    DOI: https://doi.org/10.1007/s11033-020-05583-4

    Permanent link to this page (URI)

    https://res.slu.se/id/publ/106880