Transcriptome profiling of peanut (Arachis hypogaea) gynophores in gravitropic response

文献类型： 外文期刊

第一作者： Li, Hai-fen

作者： Li, Hai-fen;Chen, Xiao-Ping;Zhu, Fang-he;Liu, Hai-Yan;Hong, Yan-Bin;Liang, Xuan-Qiang

作者机构：

关键词： gravitropism;peanut gynophore;transcriptome profiling

期刊名称：FUNCTIONAL PLANT BIOLOGY （ 影响因子：3.101； 五年影响因子：3.248 ）

ISSN： 1445-4408

年卷期： 2013 年 40 卷 12 期

页码：

收录情况： SCI

摘要： Peanut (Arachis hypogaea L.) produces flowers aerially, but the fruit develops underground. This process is mediated by the gynophore, which always grows vertically downwards. The genetic basis underlying gravitropic bending of gynophores is not well understood. To identify genes related to gynophore gravitropism, gene expression profiles of gynophores cultured in vitro with tip pointing upward (gravitropic stimulation sample) and downward (control) at both 6 and 12h were compared through a high-density peanut microarray. After gravitropic stimulation, there were 174 differentially expressed genes, including 91 upregulated and 83 downregulated genes at 6h, and 491 differentially expressed genes including 129 upregulated and 362 downregulated genes at 12h. The differentially expressed genes identified were assigned to 24 functional categories. Twenty pathways including carbon fixation, aminoacyl-tRNA biosynthesis, pentose phosphate pathway, starch and sucrose metabolism were identified. The quantitative real-time PCR analysis was performed for validation of microarray results. Our study paves the way to better understand the molecular mechanisms underlying the peanut gynophore gravitropism.

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