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Genome-wide changes in microRNA expression during short and prolonged heat stress and recovery in contrasting rice cultivars.

Abstract：

:MicroRNAs (miRNAs) are known to regulate expression of genes under stress. We report here the deep sequencing of small RNAs expressed during control, short and prolonged heat stress and recovery. Genome-wide identification of miRNAs in tolerant (Nagina 22) and susceptible (Vandana) rice cultivars was performed in 16 samples representing root and shoot of 13-day-old seedlings. The expression profile of miRNAs was analysed in 36 pairwise combinations to identify the genotype-, treatment- and tissue-dependent expression of miRNAs. Small-RNA sequencing of 16 libraries yielded ~271 million high-quality raw sequences; 162 miRNA families were identified. The highly expressed miRNAs in rice tissues were miR166, miR168, miR1425, miR529, mR162, miR1876, and miR1862. Expression of osa-miR1436, osa-miR5076, osa-miR5161, and osa-miR6253 was observed only in stressed tissue of both genotypes indicating their general role in heat stress response. Expression of osa-miR1439, osa-miR1848, osa-miR2096, osa-miR2106, osa-miR2875, osa-miR3981, osa-miR5079, osa-miR5151, osa-miR5484, osa-miR5792, and osa-miR5812 was observed only in Nagina 22 during high temperature, suggesting a specific role of these miRNAs in heat stress tolerance. This study provides details of the repertoire of miRNAs expressed in root and shoot of heat susceptible and tolerant rice genotypes under heat stress and recovery.

journal_name

J Exp Bot

journal_title

Journal of experimental botany

authors

Mangrauthia SK,Bhogireddy S,Agarwal S,Prasanth VV,Voleti SR,Neelamraju S,Subrahmanyam D

doi

10.1093/jxb/erx111

subject

Has Abstract

pub_date

2017-04-01 00:00:00

pages

2399-2412

issue

9

eissn

0022-0957

issn

1460-2431

pii

3603483

journal_volume

68

pub_type

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