Overexpression of a predominantly root-expressed NAC transcription factor in wheat roots enhances root length, biomass and drought tolerance

Plant Cell Reports
Dandan ChenGang-Ping Xue

Abstract

TaRNAC1 is a constitutively and predominantly root-expressed NAC transcription factor. TaRNAC1 overexpression in wheat roots confers increased root length, biomass and drought tolerance and improved grain yield under water limitation. A large and deep root system is an important trait for yield sustainability of dryland cereal crops in drought-prone environments. This study investigated the role of a predominantly root-expressed NAC transcription factor from wheat (TaRNAC1) in the root growth. Expression analysis showed that TaRNAC1 was a constitutively expressed gene with high level expression in the roots and was not drought-upregulated. Overexpression of TaRNAC1 in wheat using a predominantly root-expressed promoter resulted in increased root length and biomass observed at the early growth stage and a marked increase in the maturity root biomass with dry root weight of > 70% higher than that of the wild type plants. Analysis of some root growth-related genes revealed that the expression level of GA3-ox2, which encodes GIBBERELLIN 3-OXIDASE catalysing the conversion of inactive gibberellin (GA) to active GA, was elevated in the roots of transgenic wheat. TaRNAC1 overexpressing transgenic wheat showed more dehydration toleranc...Continue Reading

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Citations

Jun 5, 2018·International Journal of Genomics·Chunsheng GaoGonggu Zang
Jun 3, 2018·International Journal of Molecular Sciences·Sardar-Ali KhanHong-Ju Yin
Jan 12, 2021·Physiology and Molecular Biology of Plants : an International Journal of Functional Plant Biology·A M AbdelmoghnyV N Waghmare
Mar 31, 2021·Journal of Experimental Botany·Chaonan LiRuilian Jing
Jun 20, 2021·Biochemical and Biophysical Research Communications·Tong HanAying Zhang
Oct 22, 2021·Frontiers in Plant Science·Huimin ZhaoYucheng Wang

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Datasets Mentioned

BETA
CD929986
HX176608
MF474262

Methods Mentioned

BETA
environmental stress
environmental stresses
transgenic
PCR
RNASeq

Software Mentioned

BLAST
RNASeq

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