文献类型: 外文期刊
第一作者: Xiuming Wu
作者: Xiuming Wu;Fuguang Li#2;;Chaojun Zhang;Chuanliang Liu;Xueyan Zhang
作者机构:
关键词: Gossypium hirsutum;cotton;callus culture;somatic embryogenesis;gene expression regulation;DNA libraries;complementary DNA;expressed sequence tags;sequence analysis
期刊名称:JOURNAL OF PLANT PHYSIOLOGY ( 影响因子:3.549; 五年影响因子:4.164 )
ISSN:
年卷期:
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收录情况: SCI
摘要: Regeneration is an essential step for recovery of transgenic plants following gene transfer. However, most cotton cultivars fail to respond to the current regeneration protocols for cotton. This hinders the use of gene transfer technology to improve this crop. Identification of the genes involved in cotton somatic embryogenesis (SE) may provide information that will help to improve regeneration protocols. To investigate the genes expressed during cotton SE, we constructed a suppression subtractive hybridization (SSH) library using cDNA from nonembryogenic callus as driver and those from embryogenic callus as tester. From this library, 368 cDNA clones that hybridized conspicuously to the forward-subtracted and unsubtracted tester probes, but not to the reverse-subtracted or unsubtracted driver probes, were obtained and sequenced. Among the 241 putative unigenes, the functions of 152 genes (63%) could be assigned using existing databases. In addition to many previously reported SE-related genes, some new genes, such as members of ethylene pathway and auxin pathway, were discovered in our library. The expression of eight genes, including an Aux/IAA responsive gene, was analyzed by reverse-transcription-polymerase chain reaction and found to be upregulated during the SE. This is in agreement with previous studies showing that embryogenesis involves auxin signaling.
分类号: Q94
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