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Regulation of Leaf Polarity during Leaf Development  

Cho, Kiu-Hyung (Division of Molecular Biotechnology, Dong A University)
Jun, Sang-Eun (Division of Molecular Biotechnology, Dong A University)
Tsukaya , Hirokazu (Graduate School of Science, University of Tokyo)
Kim, Gyung-Tae (Division of Molecular Biotechnology, Dong A University)
Publication Information
Korean Journal of Plant Taxonomy / v.38, no.1, 2008 , pp. 51-61 More about this Journal
Abstract
Leaves are indeterminate organs and possess a lot of genes which is involved in establishing leaf polarities. These polarities are regulated relatively early during leaf development and defined relative to the factors intrinsic to the primordia and interactions with the shoot apical meristem (SAM). Recently, several genes that control the polarity of lateral organs have been identified. Our genetic study of deformed root and leaf1 (drl1) mutant, which produces narrow, filament‐like leaves and defective meristems, revealed that DRL1 is involved in the regulation of SAM activity and leaf polarity. The DRL1 gene was found to encode a novel protein showing homology to Elongator‐associate protein (EAP) of yeast KTI12. The amino acid sequence of DRL1 is universally conserved in prokaryotes and eukaryotes. DRL1 and the plant DRL1 homologs clearly formed a monophyletic clade, suggesting the evolutionary conservation of DRL1 homologs was maintained in the genomes of all land plants.
Keywords
dorsoventrality; drll mutant; leaf polarity; shoot apical meristem;
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