生物
脱落酸
转基因
基因
耐旱性
转基因作物
基因表达
非生物胁迫
转录组
转基因水稻
干旱胁迫
细胞生物学
拟南芥
非生物成分
生物逆境
转录因子
拟南芥
渗透性休克
植物
遗传学
突变体
作者
Wenbo Chai,Nannan Song,Anqi Su,Jun Wang,Weina Si,Beijiu Cheng,Haiyang Jiang
出处
期刊:Plant Science
[Elsevier]
日期:2021-11-01
卷期号:312: 111034-111034
标识
DOI:10.1016/j.plantsci.2021.111034
摘要
• Transgenic Arabidopsis overexpressing ZmmiR190 was much more sensitive than wild type under drought stress. • An nuclear-localized gene, ZmCRP04 , are predicted to be a promising target of ZmmiR190 . • ZmmiR190 and ZmCRP04 have apparently reverse expression profiles under drought treatments. • Overexpressing ZmCRP04 in Arabidopsis and rice could significantly enhance drought tolerance. • Transgenic plants overexpressing ZmmiR190 or ZmCRP04 are hypersensitive to abscisic acid (ABA). MicroRNAs (miRNAs) are small, non-coding regulatory RNAs that regulate gene expression by facilitating target mRNA cleavage in plants. They are crucial for responses to diverse stresses. The novel drought-responsive miRNA ZmmiR190 was previously identified during an analysis of the maize transcriptome. In this study, we revealed that transgenic Arabidopsis thaliana overexpressing ZmmiR190 is more sensitive to drought than the wild-type control. The transcript of a nuclear-localized gene, ZmCRP04 , was identified as a likely target of ZmmiR190. Moreover, ZmmiR190 and ZmCRP04 had the opposite expression profiles following drought and salt treatments. Additionally, 5′ RACE and coexpression analyses in A. thaliana provided evidence of the in vivo targeting of the ZmCRP04 transcript by ZmmiR190. Furthermore, the overexpression of ZmCRP04 in A. thaliana and rice significantly enhanced drought tolerance, with lower malonaldehyde contents and relative electrolyte leakage in the transgenic A. thaliana and rice plants than in the wild-type control. Transgenic plants overexpressing ZmmiR190 or ZmCRP04 were hypersensitive to abscisic acid. These results suggest that the ZmCRP04 transcript is targeted by ZmmiR190 and may encode a protein that positively regulates drought stress tolerance via an abscisic acid-dependent pathway. These findings may be relevant for future molecular breeding aimed at improving crop drought tolerance.
科研通智能强力驱动
Strongly Powered by AbleSci AI