Isolation and characterization of a sterile-dwarf mutant in Asian cotton (Gossypium arboreum L.)  

作　　者：Chuntai Wu Baoliang Zhou Tianzhen Zhang 

机构地区：[1]National Key Laboratory of Crop Genetics and Germplasm Enhancement, Cotton Research Institute, Nanjing Agricultural University, Nanjing 210095, China

出　　处：《Journal of Genetics and Genomics》2009年第6期343-353,共11页遗传学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 30571184);the National Key Technologies Research and Development(R&D) Program of China (No. 2004BA525B05-1)

摘　　要：Plant height is an important trait in cotton. To elucidate the molecular mechanisms of the dwarf phenotype, a sterile-dwarf mutant derived from Gossypium arboreum L. cv. Jinhuazhongmian was developed by ^60Co y-ray irradiation. The results demonstrated that the steriledwarf mutant phenotype was controlled by a pair of recessive gene, which was designated sd^a. Plants carrying the sd^a gene contained lower levels of indole-3-acetic acid （IAA） and abscisic acid （ABA） compared with wild-type （WT） plants. The chlorophyll content and net photosynthetic rate in mutant leaves were markedly decreased. However, it was possible that ABA biosynthesis or signaling was involved in governing the sd^a phenotype. Semi-quantitative RT-PCR analysis detected 13 differentially expressed ESTs, and the steriledwarf mutant exhibited decreased expression levels relative to the WT. The role of nine potential hormone biosynthetic genes in the synthesis of IAA, ABA, polyamines （PAs） and jasmonic acid （JA） were discussed.Plant height is an important trait in cotton. To elucidate the molecular mechanisms of the dwarf phenotype, a sterile-dwarf mutant derived from Gossypium arboreum L. cv. Jinhuazhongmian was developed by ^60Co y-ray irradiation. The results demonstrated that the steriledwarf mutant phenotype was controlled by a pair of recessive gene, which was designated sd^a. Plants carrying the sd^a gene contained lower levels of indole-3-acetic acid （IAA） and abscisic acid （ABA） compared with wild-type （WT） plants. The chlorophyll content and net photosynthetic rate in mutant leaves were markedly decreased. However, it was possible that ABA biosynthesis or signaling was involved in governing the sd^a phenotype. Semi-quantitative RT-PCR analysis detected 13 differentially expressed ESTs, and the steriledwarf mutant exhibited decreased expression levels relative to the WT. The role of nine potential hormone biosynthetic genes in the synthesis of IAA, ABA, polyamines （PAs） and jasmonic acid （JA） were discussed.

关 键 词：Gossypium arboreum sd^a AUXIN abscisic acid ESTS 

分 类 号：Q945.78[生物学—植物学]