MIR1868 negatively regulates rice cold tolerance at both the seedling and booting stages

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外文摘要：Low temperature causes rice yield losses of up to 30％-40％,therefore increasing its cold tolerance is a breeding target.Few genes in rice are reported to confer cold tolerance at both the vegetative and repro-ductive stages.This study revealed a rice-specific 24-nt miRNA,miR1868,whose accumulation was sup-pressed by cold stress.Knockdown of MIR1868 increased seedling survival,pollen fertility,seed setting,and grain yield under cold stress,whereas its overexpression conferred the opposite phenotype.Knockdown of MIR1868 increased reactive oxygen species(ROS)scavenging and soluble sugar content under cold stress by increasing the expression of peroxidase genes and sugar metabolism genes,and its overexpression produced the opposite effect.Thus,MIR1868 negatively regulated rice cold tolerance via ROS scavenging and sugar accumulation.

外文关键词：

RiceCold tolerancemiRNAROS scavengingSoluble sugar accumulation

作者：

Yang Shen、Xiaoxi Cai、Yan Wang、Wanhong Li、Dongpeng Li、Hao Wu、Weifeng Dong、Bowei Jia、Mingzhe Sun、Xiaoli Sun

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作者单位：

Crop Stress Molecular Biology Laboratory,Heilongjiang Bayi Agricultural University,Daqing 163319,Heilongjiang,China

基金：

国家自然科学基金国家自然科学基金国家自然科学基金国家重点研发计划黑龙江省自然科学基金Double First-class Innovation Achieve-ment Program of Heilongjiang ProvinceGraduate Student Scientific Research Innovation Projects of Heilongjiang Bayi Agricultural University

项目编号：

U20A202532101672319718262021YFF1001100YQ2023C035LJGXCG2023-072YJSCX2022-Z01

出版年：

2024

DOI：

10.1016/j.cj.2024.02.005

作物学报(英文版)

CSTPCD

ISSN：

年,卷(期)：2024.12(2)

参考文献量43