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Z inc F inger P rotein 6 ( ZFP 6 ) regulates trichome initiation by integrating gibberellin and cytokinin signaling in A rabidopsis thaliana
Author(s) -
Zhou Zhongjing,
Sun Lili,
Zhao Yongqin,
An Lijun,
Yan An,
Meng Xiaofang,
Gan Yinbo
Publication year - 2013
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/nph.12211
Subject(s) - trichome , zinc finger , microbiology and biotechnology , gibberellin , biology , cytokinin , inflorescence , transcription factor , chemistry , botany , auxin , genetics , gene
Summary The A rabidopsis trichome is a model system for studying cell development, cell differentiation and the cell cycle in plants. Our previous studies have shown that the ZINC FINGER PROTEIN 5 ( ZFP 5) controls shoot maturation and epidermal cell fate through GA signaling in A rabidopsis. We have identified a novel C 2 H 2 zinc finger protein ZINC FINGER PROTEIN 6 ( ZFP 6) which plays a key role in regulating trichome development in A rabidopsis . Overexpression of ZFP 6 results in ectopic trichomes on carpels and other inflorescence organs. Gain‐ and loss‐of‐function analyses have shown that the zfp6 mutant exhibits a reduced number of trichomes in sepals of flowers, cauline leaves, lateral branch and main inflorescence stems in comparison to wild‐type plants. Molecular and genetic analyses suggest that ZFP 6 functions upstream of GIS , GIS 2 , ZFP 8 , ZFP 5 and key trichome initiation regulators GL 1 and GL 3 .We reveal that ZFP 6 and ZFP 5 mediate the regulation of trichome initiation by integrating GA and cytokinin signaling in A rabidopsis . These findings provide new insights into the molecular mechanism of plant hormone control of epidermal trichome patterning through C 2 H 2 transcriptional factors.