ATML1 and PDF2 Play a Redundant and Essential Role in Arabidopsis Embryo Development

Plant & Cell Physiology
Eriko OgawaTaku Takahashi

Abstract

The epidermis of shoot organs in plants develops from the outermost layer (L1) of the shoot apical meristem. In Arabidopsis, a pair of homeobox genes, ARABIDOPSIS THALIANA MERISTEM LAYER1 (ATML1) and PROTODERMAL FACTOR2 (PDF2), play a role in regulating the expression of L1-specific genes. atml1-1 pdf2-1 double mutants show striking defects in the differentiation of shoot epidermal cells. However, because atml1-1 and pdf2-1 have a T-DNA inserted downstream of the respective homeobox sequences, these alleles may not represent null mutations. Here we characterized additional mutant alleles that have a T-DNA insertion at different positions of each gene. Double mutants of a strong atml1-3 allele with each pdf2 allele were found to cause embryonic arrest at the globular stage. Although with low frequency, all double mutant combinations of a weak atml1-1 allele with each pdf2 allele germinated and showed phenotypes defective in shoot epidermal cell differentiation. We further confirmed that transgenic induction of PDF2 fused to the Drosophila Engrailed repressor domain temporarily interferes with epidermal cell differentiation in the wild-type background. These results indicate that ATML1 and PDF2 act redundantly as a positive regul...Continue Reading

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Citations

Mar 27, 2016·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Haiyang ZhangZhonghai Ren
Sep 1, 2016·Annual Review of Cell and Developmental Biology·Joakim PalovaaraDolf Weijers
Mar 17, 2019·International Journal of Molecular Sciences·Ewa M Kalemba, Ewelina Stolarska
Feb 6, 2019·The Plant Journal : for Cell and Molecular Biology·Feng XiongXiu-Ling Wang
Jan 29, 2020·Journal of Experimental Botany·Min-Liang WuHong Cui
Jun 4, 2020·Journal of Experimental Botany·Yanling CaiXingwang Liu
Jul 30, 2020·Journal of Integrative Plant Biology·Lüwen ZhouYuling Jiao
Jun 20, 2019·Frontiers in Plant Science·Jingwen GanRongling Wu
Jul 31, 2019·Plant & Cell Physiology·Dukhyun HwangShuh-Ichi Nishikawa
Oct 13, 2020·The Biochemical Journal·Ran TianSharyn E Perry
Feb 7, 2021·Plants·Hiroyuki Iida, Shinobu Takada
Feb 20, 2021·Annual Review of Plant Biology·Thomas Dresselhaus, Gerd Jürgens

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