Deep sequencing analysis of the transcriptomes of peanut aerial and subterranean young pods identifies candidate genes related to early embryo abortion

文献类型： 外文期刊

第一作者： Chen, Xiaoping

作者： Chen, Xiaoping;Zhu, Wei;Zhu, Fanghe;Li, Haifen;Hong, Yanbin;Liu, Haiyan;Zhang, Erhua;Zhou, Guiyuan;Li, Shaoxiong;Zhong, Ni;Wen, Shijie;Li, Xingyu;Varshney, Rajeev K.;Liang, Xuanqiang;Zhu, Wei;Azam, Sarwar;Varshney, Rajeev K.;Li, Heying;Wu, Hong;Yu, Shanlin;Knapp, Steve J.;Ozias-Akins, Peggy

作者机构：

关键词： peanut;aerial and subterranean pod;transcriptome;RNA sequencing

期刊名称：PLANT BIOTECHNOLOGY JOURNAL （ 影响因子：9.803； 五年影响因子：9.555 ）

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年卷期：

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收录情况： SCI

摘要： The failure of peg penetration into the soil leads to seed abortion in peanut. Knowledge of genes involved in these processes is comparatively deficient. Here, we used RNA-seq to gain insights into transcriptomes of aerial and subterranean pods. More than 2 million transcript reads with an average length of 396bp were generated from one aerial (AP) and two subterranean (SP1 and SP2) pod libraries using pyrosequencing technology. After assembly, sets of 49632, 49952 and 50494 from a total of 74974 transcript assembly contigs (TACs) were identified in AP, SP1 and SP2, respectively. A clear linear relationship in the gene expression level was observed between these data sets. In brief, 2194 differentially expressed TACs with a 99.0% true-positive rate were identified, among which 859 and 1068 TACs were up-regulated in aerial and subterranean pods, respectively. Functional analysis showed that putative function based on similarity with proteins catalogued in UniProt and gene ontology term classification could be determined for 59342 (79.2%) and 42955 (57.3%) TACs, respectively. A total of 2968 TACs were mapped to 174 KEGG pathways, of which 168 were shared by aerial and subterranean transcriptomes. TACs involved in photosynthesis were significantly up-regulated and enriched in the aerial pod. In addition, two senescence-associated genes were identified as significantly up-regulated in the aerial pod, which potentially contribute to embryo abortion in aerial pods, and in turn, to cessation of swelling. The data set generated in this study provides evidence for some functional genes as robust candidates underlying aerial and subterranean pod development and contributes to an elucidation of the evolutionary implications resulting from fruit development under light and dark conditions.

分类号： Q7

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