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MYB30 and ETHYLENE INSENSITIVE3 antagonistically modulate root hair growth in Arabidopsis
Author(s) -
Xiao Fei,
Gong Qianyuan,
Zhao Shuangshuang,
Lin Honghui,
Zhou Huapeng
Publication year - 2021
Publication title -
the plant journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.058
H-Index - 269
eISSN - 1365-313X
pISSN - 0960-7412
DOI - 10.1111/tpj.15180
Subject(s) - arabidopsis , mutant , transcription factor , root hair , microbiology and biotechnology , promoter , transcription (linguistics) , ethylene , biology , elongation , transcriptional regulation , function (biology) , gene , chemistry , biochemistry , gene expression , linguistics , philosophy , materials science , ultimate tensile strength , metallurgy , catalysis
SUMMARY Root hair (RH) is essential for plant nutrient acquisition and the plant–environment communication. Here we report that transcription factors MYB30 and ETHYLENE INSENSITIVE3 (EIN3) modulate RH growth/elongation in Arabidopsis in an antagonistic way. The MYB30 loss‐of‐function mutant displays enhanced RH length, whereas the RH elongation in MYB30‐overexpressing plants is highly repressed. MYB30 physically interacts with EIN3, a master transcription factor in ethylene signaling. MYB30 directly binds the promoter region of ROOT HAIR DEFECTIVE SIX‐LIKE4 ( RSL4 ) and represses its transcription. RSL4 loss‐of‐function suppresses the enhanced RH growth in myb30 mutant plants. Ethylene enhances MYB30‐EIN3 complex formation, and reduces the association between MYB30 and RSL4 promotor via the action of EIN3. MYB30 and EIN3 antagonistically regulate the expression of RSL4 and a subset of core RH genes in a genome‐wide way. Taken together, our work revealed a novel transcriptional network that modulates RH growth in plants.