The miR172c-NNC1 module modulates root plastic development in response to salt in soybean

BMC Plant Biology

Qiong Jiang¹  Lixiang Wang²  Xia Li²  Zulfiqar Ali Sahito²  Xingke Zhang²  Ihteram Ullah²  Qiqi Yan²  Zhengxi Sun³  Yiping Tong³ 

[1] Institute of Genetics and Developmental Biology, Chinese Academy of Sciences;State Key Laboratory of Agricultural Microbiology, College of Plant Science and Technology, Huazhong Agricultural University;State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetic and Developmental Biology, Chinese Academy of Sciences;

关键词: miR172c;    Root development;    Salt stress;    Soybean;   

DOI  :  10.1186/s12870-017-1161-9

来源: DOAJ

【 摘 要 】

Abstract Background Plant roots are highly plastic to high salinity. However, the molecular mechanism by which root developmental plasticity is regulated remains largely unknown. Previously we reported that miR172c-NNC1 module plays a key role in soybean-rhizobial symbiosis. The fact that the miR172c promoter contains several stress-related cis elements indicates that miR172c may have a role in root response to abiotic stress. Results Here we showed that miR172c is greatly induced by salt stress in soybean. Overexpression of miR172c and knockdown of miR172c activity resulted in substantially increased and reduced root sensitivity to salt stress, respectively. Furthermore, we show that the target gene NNC1 (Nodule Number Control 1) of miR172c was downregulated by salt stress. The transgenic roots overexpressing or knocking down NNC1 expression also exhibited the altered root sensitivity to salt stress. Conclusion The study reveals the crucial role of miR172c-NNC1 module in root stress tolerance to salt stress in soybean.

【 授权许可】

Unknown