Identification and characterization of drought responsive miRNAs in a drought tolerant upland rice cultivar KMJ 1-12-3.

Identification and characterization of drought responsive miRNAs in a drought tolerant upland rice cultivar KMJ 1-12-3.
Plant Physiol Biochem. 2019 Apr;137:62-74
Authors: Awasthi JP, Chandra T, Mishra S, Parmar S, Shaw BP, Nilawe PD, Chauhan NK, Sahoo S, Panda SK
Abstract
Shortfall of rain that creates drought like situation in non-irrigated agriculture system often limits rice production, necessitating introduction of drought tolerance trait into the cultivar of interest. The mechanism governing drought tolerance is, however, largely unknown, particularly the involvement of miRNAs, the master regulators of biochemical events. In this regard, response study on a drought tolerant rice variety KMJ 1-12-3 to 20% PEG (osmolality- 315 mOsm/kg) as drought stress revealed significant changes in abundance of several conserved miRNAs targeting transcription factors like homeodomain-leucine zipper, MADS box family protein, C2H2 zinc finger protein and Myb, well known for their importance in drought tolerance in plants. The response study also revealed significant PEG-induced decrease in abundance of the miRNAs targeting cyclin A, cyclin-dependent kinase, guanine nucleotide exchange factor, GTPase-activating protein, 1-aminocyclopropane-1-carboxylic acid oxidase and indole-3-acetic beta-glucosyl transferase indicating miRNA-regulated role of the cell cycle regulators, G-protein signalling and the plant hormones ethylene and IAA in drought toler...

Source: Physiological Research - March 10, 2019 Category: Physiology Authors: Awasthi JP, Chandra T, Mishra S, Parmar S, Shaw BP, Nilawe PD, Chauhan NK, Sahoo S, Panda SK Tags: Plant Physiol Biochem Source Type: research