title: The Arabidopsis EIN2 restricts organ growth by retarding cell expansion.
abstract: The growth of plant organ to its characteristic size is a fundamental developmental process, but the mechanism is still poorly understood. Plant hormones play a great role in organ size control by modulating cell division and/or cell expansion. Ethylene insensitve 2 (EIN2) was first identified by a genetic screen for ethylene insensitivity and is regarded as a central component of ethylene signaling, but its role in cell growth has not been reported. Here we demonstrate that changed expression of EIN2 led to abnormity of cell expansion by morphological and cytological analyses of EIN2 loss-of-function mutants and the overexpressing transgenic plant. Our findings suggest that EIN2 controls final organ size by restricting cell expansion.
authors.affiliation: a School of Life Sciences; Jinggangshan University; Ji'an , Jiangxi , PR China.
authors.forename: Guanping
authors.initials: G
authors.lastname: Feng
authors.forename: Gang
authors.initials: G
authors.lastname: Liu
authors.forename: Jianhua
authors.initials: J
authors.lastname: Xiao
mesh_terms: D017360:Arabidopsis / Q000254:growth & development*; D029681:Arabidopsis Proteins / Q000502:physiology*; D049108:Cell Enlargement; D062951:Endoreduplication; D005030:Ethylenes / Q000378:metabolism; D010940:Plant Proteins / Q000378:metabolism; D011956:Receptors, Cell Surface / Q000502:physiology*
chemical_list: D029681:Arabidopsis Proteins; C119963:EIN2 protein, Arabidopsis; D005030:Ethylenes; D010940:Plant Proteins; D011956:Receptors, Cell Surface; C095825:expansin protein, plant; C036216:ethylene
keywords: Arabidopsis thaliana; EIN2; cell expansion; organ size