The miR164-TaNAC14 module regulates root development and abiotic-stress tolerance in wheat seedlings  

作　　者：CHI Qing DU Lin-ying MA Wen NIU Ruo-yu WU Bao-wei GUO Li-jian MA Meng LIU Xiang-li ZHAO Hui-xian 

机构地区：[1]College of Life Sciences,Northwest A&F University,Yangling 712100,P.R.China

出　　处：《Journal of Integrative Agriculture》2023年第4期981-998,共18页农业科学学报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(32072003and 32072059);the Key Research and Development Program of Shaanxi Province,China(2021NY-079)。

摘　　要：Previous studies have revealed the miR164 family and the miR164-targeted NAC transcription factor genes in rice(Oryza sativa)and Arabidopsis that play versatile roles in developmental processes and stress responses.In wheat(Triticum aestivum L.),we found nine genetic loci of tae-miR164(tae-MIR164 a to i)producing two mature sequences that downregulate the expression of three newly identified target genes of TaNACs(TaNAC1,TaNAC11,and TaNAC14)by the cleavage of the respective mRNAs.Overexpression of tae-miR164 or one of its target genes(TaNAC14)demonstrated that the miR164-TaNAC14 module greatly affects root growth and development and stress(drought and salinity)tolerance in wheat seedlings,and TaNAC14 promotes root growth and development in wheat seedlings and enhances drought tolerance,while tae-miR164 inhibits root development and reduces drought and salinity tolerance by downregulating the expression of TaNAC14.These findings identify the miR164-TaNAC14 module as well as other taemiR164-regulated genes which can serve as new genetic resources for stress-resistance wheat breeding.

关 键 词：Triticum aestivum L. tae-miR164 miR164-targeted TaNACs miR164-TaNAC14 module growth and development abiotic-stress tolerance 

分 类 号：S512.1[农业科学—作物学]