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,
出处
《分子植物育种》
CAS
CSCD
2007年第2期159-160,共2页
Molecular Plant Breeding
关键词
生物化学
棉花
纤维
伸长率
Transcriptome, Cotton fiber, Elongation, APX, Ethylene, H2O2
