TCP4 interacts with HDA6 and regulates flowering and leaf development in Arabidopsis
Date Issued
2015
Date
2015
Author(s)
Chuang, Ling
Abstract
TCP transcription factors participate in diverse plant developmental processes such as seed germination and leaf senescence. Class II TCPs influence leaf morphogenesis by regulating cell proliferation at the margins of the developing leaf primordia in Arabidopsis. We found that HDA6 can interact with many TCPs in yeast two-hybrid assays and bimolecular fluorescence complementation assays. In addition, tcp4 mutants have a late flowering phenotype under long day conditions. The double mutant of tcp4 and hda6 (axe1-5), tcp4-2/axe1-5, shows enhanced delayed flowering phenotypes and displays severe serration and curling leaf phenotypes compared to the tcp4 and axe1-5 single mutants. Furthermore, in the triple mutant of tcp4, axe1-5, as1-1 or as2-1, the plant sizes are smaller and their leaves are more serrated compared to tcp4-2/axe1-5 double mutants. The expression of the leaf development regulating gene KNATM and flowering time control genes FLC, MAF4 and MAF5 are increased in tcp4 and axe1-5 mutants compared to wild type. These data suggest that TCP4 and HDA6 might influence the flowering time and leaf development by acting cooperatively to regulate downstream gene expression in Arabidopsis.
Subjects
Arabidopsis
flowering time
leaf morphology
Type
thesis
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