Transcriptome Profiling and Biochemical Studies Reveal New Mechanisms for Cotton Fiber Cell Elongation  

作　　者：Y.H. Shi Y.M. Qin C.Y. Hu Y. Pang Y.X. Zhu 

机构地区：[1]The National laboratory of Protein Engineering and Plant Genetic Engineering, College of Life Sciences, Peking University, Beijing, 100871, China

出　　处：《分子植物育种》2007年第2期159-160,共2页Molecular Plant Breeding

摘　　要：Cotton is the world's most important natural textile fi ber, and is practiced on about 2.5% of arable land that supported the life of about 100 million family units. Each cotton fi ber, about 25 000 per seed, is a single, phe-Cotton is the world＇s most important natural textile fiber, and is practiced on about 2.5% of arable land that supported the life of about 100 million family units. Each cotton fiber, about 25 000 per seed, is a single, phenomenally elongate, epidermal cell of the cotton seed. Biologically, cotton fiber is an excellent model system for plant cell elongation and cell wall and cellulose biosynthesis （Qin et al., 2005; 2007; Xu et al., 2007）. The fiber is composed of nearly pure cellulose, which is also the largest component of plan（biomass （Lu et al., 2002）. Here, through sequencing of a cotton fiber eDNA library and subsequent microarray analysis, we found that ethylene biosynthesis is one of the most significantly up regulated biochemical pathway during the fiber elongation period. ACO1-3 genes responsible for ACC （1-aminocyclopropane-l-carboxylic acid） oxidation and ethylene production were expressed at significantly higher levels during this growth stage. The amount of ethylene released from cultured ovules correlated with ACO expression and the rate of fiber growth. Exogenously applied ethylene promoted robust fiber cell expansion,

关 键 词：生物化学 棉花 纤维 伸长率 

分 类 号：S562[农业科学—作物学]