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Angiosperm Flora of India

A Novel Isoform of Sucrose Synthase Is Targeted to the Cell Wall during Secondary Cell Wall Synthesis in Cotton Fiber

Publication Type:Journal Article
Year of Publication:2011
Authors:Brill, E, van Thournout, M, White, RG, Llewellyn, D, Campbell, PM, Engelen, S, Ruan, Y-L, Arioli, T, Furbank, RT
Journal:Plant Physiology
Volume:157
Issue:1
Date Published:2011
ISBN Number:00320889
Keywords:Gossypium
Abstract:

Sucrose (Sue) synthase (Sus) is the major enzyme of Sue breakdown for cellulose biosynthesis in cotton (Gossypium hirsutum) fiber, an important source of fiber for the textile industry. This study examines the tissue-specific expression, relative abundance, and temporal expression of various Sus transcripts and proteins present in cotton. A novel isoform of Sus (SusC) is identified that is expressed at high levels during secondary cell wall synthesis in fiber and is present in the cell wall fraction. The phylogenetic relationships of the deduced amino acid sequences indicate two ancestral groups of Sus proteins predating the divergence of monocots and dicots and that SusC sequences form a distinct branch in the phylogeny within the dicotspecific clade. The subcellular location of the Sus isoforms is determined, and it is proposed that cell wall-localized SusC may provide UDP-glucose for cellulose and callóse synthesis from extracellular sugars.

URL:http://www.jstor.org/stable/41435487
Short Title:Plant Physiology
Taxonomic name: 
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