典型文献
TGA factors promote plant root growth by modulating redox homeostasis or response
文献摘要：
To identify novel regulators of stem cell renewal, we mined an existing but little explored cell type-specific transcriptome dataset for the Arabi-dopsis root. A member of the TGA family of transcription factors, TGA8, was found to be specifically expressed in the quiescent center (QC). Mutation in TGA8 caused a subtle root growth phenotype, suggesting functional re-dundancy with other TGA members. Using a promoter::HGFP transgenic approach, we showed that all TGA factors were expressed in the root, albeit at different levels and with dis-tinct spatial patterns. Mutant analyses revealed that all TGA factors examined contribute to root growth by promoting stem cell renewal, mer-istem activity, and cell elongation. Combining transcriptome analyses, histochemical assays, and physiological tests, we demonstrated that functional redundancy exists among members of clades Ⅱ and V or those in clades I and Ⅲ. These two groups of TGA factors act differently, how-ever, as their mutants responded to oxidative stress differently and quantitative reverse tran-scription polymerase chain reaction assays showed they regulate different sets of genes that are involved in redox homeostasis. Our study has thus uncovered a previously unrecognized broad role and a mechanistic explanation for TGA fac-tors in root growth and development.
文献关键词：
中图分类号：
作者姓名：
Xiaochen Hu;Liyun Yang;Mengfei Ren;Lin Liu;Jing Fu;Hongchang Cui
作者机构：
State Key Laboratory of Crop Stress Biology for Arid Areas,College of Life Sciences,Northwest A&F University,Yangling 712100,China;Department of Biological Science,Florida State University,Tallahassee,FL 32306,USA
文献出处：
引用格式：
[1]Xiaochen Hu;Liyun Yang;Mengfei Ren;Lin Liu;Jing Fu;Hongchang Cui-.TGA factors promote plant root growth by modulating redox homeostasis or response)[J].植物学报（英文版）,2022(08):1543-1559
A类：
dopsis,TGA8,HGFP,istem
B类：
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AB值：
0.545171
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