关键词: 棉花纤维发育, 第Ⅲ类过氧化物酶, 基因结构分析, 基因表达分析

Abstract: Class Ⅲ peroxidases in plants, as the unique secretory peroxidases, are widely exist in extracellular space or vacuole, and participate in developmental and biochemical pathways in response to biotic and abiotic stresses. To analyse their functions in cotton fiber development, we searched Class Ⅲ peroxidases in Gossypium raimondii genome using GO Annotation and Conserved Domain Analysis. The results showed that G. raimondii genome contains 90 peroxidase genes, which can be classified into 8 subgroups. Transcriptome analysis revealed that the Class Ⅲ GrPrx genes have differential expression patterns in different tissues and different fiber developmental stages, in which GrPrx11 and GrPrx16 highly express in the secondary cell wall synthesis stage, indicating that the importance of Class Ⅲ GrPrxs genes during fiber development.

Key words: cotton fiber development, Class Ⅲ peroxidases, gene structure, gene expression