Plant cell expansion is regulated bx O-glycoproteins of the AGP type
Abstract
Plant cellexpansionisregulatedby O-glycoproteinsofthe AGP type The major mode of morphogenesis in plants is oriented cell expansion. The fibrous polymers of the plant cell wall have to be properly deposited and undergo specific remodelling processes to enable cell expansion. The machinery of cell wall performance and integrity control is thought to play a crucial role in the coordination of these intricate processes. There is evidence that O-glycoproteins of the arabinogalactan-protein (AGP) type are required for the process of plant cell elongation. The root cell elongation defect caused by mutations in the ArabidopsisthalianaFASCICLIN LIKE AGP 4 gene (FLA4) is a genetic paradigm for this role and was used as a background for a phenotypic suppressor screen. The identified loci define genetic intersections between the role of FLA4 in cell elongation, in the control of functional cellulose biosynthesis, in abiotic stress and potentially in ethylene independent ACC signalling. Here it is proposed to investigate the molecular identities of several suppressor loci of fla4 (slof) that are specifically involved in the requirement for FLA4 to obtain normal cell length. In a collaboration with the lab of Jose Manuel Estevez, University of Buenos Aires who have isolated genetic suppressors of the role of AGPs in hypocotyl elongation we plan to integrate our two mutant collections identified in independent but functionally related screens and to investigate the cellular properties of the newly identified gene products. This joint effort will expand the knowledge on the regulation of plant cell expansion and thereby widen the understanding of growth processes in crop species.
Publikationen
Project staff
Georg Seifert
Priv.-Doz. Dipl.-Ing. Dr.rer.nat. Georg Seifert
georg.seifert@boku.ac.at
Tel: +43 1 47654-94044, 94054
BOKU Project Leader
02.05.2013 - 01.05.2018