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miR1916 plays a role as a negative regulator in drought stress resistance in tomato and tobacco

Author:
Chen, Lei, Meng, Jun, Luan, Yushi
Source:
Biochemical and biophysical research communications 2019 v.508 no.2 pp. 597-602
ISSN:
0006-291X
Subject:
Solanaceae, drought, histone deacetylase, messenger RNA, microRNA, osmoregulation, plant response, reactive oxygen species, stress response, stress tolerance, tobacco, tomatoes, transgenic plants, water stress
Abstract:
MicroRNAs (miRNAs) play important roles in regulating plant responses to various environmental stresses. In our study, overexpression of miR1916 in tomato (OE-1) reduced its tolerance to drought. The miR1916-silenced transgenic plants (ST-1 and Anti-7) significantly increased resistance to drought stress. The transgenic tobacco plants also have a similar result in displaying the tolerance of drought. Physiological analysis revealed that miR1916 affected the osmoregulation and reactive oxygen species (ROS) accumulation. In addition, transcript levels of the miR1916 target genes, histone deacetylases (HDAC) and strictosidine synthase (STR), decreased in miR1916-overexpressing transgenic tobacco plants. Our results suggested that miR1916 is a passive regulator in the plant resistance to drought stress and has potentially impacting on abiotic stress responses in Solanaceae.
Agid:
6250490