数字农科院2.0

Comparative proteomic analysis reveals differentially expressed proteins correlated with fuzz fiber initiation in diploid cotton (Gossypium arbareum L.)

文献类型： 外文期刊

作者： Du, Shao-Jun;Dong, Chun-Juan;Zhang, Bing;Liu, Jin-Yuan;Du, Shao-Jun;Dong, Chun-Juan;Zhang, Bing;Liu, Jin-Yuan;Lai, Tong-Fei;Du, Xiong-Ming

作者机构：

关键词： Diploid cotton;Fuzz fiber initiation;Comparative proteome;Differentially expressed proteins;Protein network;Molecular basis

期刊名称： JOURNAL OF PROTEOMICS

ISSN： 1874-3919

年卷期： 2013 年 82 卷

页码：

收录情况： SCI

摘要： related proteins in wild-type diploid cotton (Gossypium arboreum L.) and its fuzzless mutant. Temporal changes in global proteomes were examined using 2-DE at five developmental time points for fuzz fiber initiation, and 71 differentially expressed protein species were identified by MS, 45 of which were preferentially accumulated in the wild-type. These proteins were assigned to several functional categories, mainly in cell response/signal transduction, redox homeostasis, protein metabolism and energy/carbohydrate metabolism. It was remarkable that more than ten key proteins with high-abundance were involved in gibberellic acid (GA) signaling and ROS scavenging, and increasing concentrations of active GAs and H2O2 were also detected approximately 5 dpa in wild type ovules. Furthermore, in vivo GA and H2O2 treatments of ovules inside young bolls showed that these compounds can synergistically promote fuzz fiber initiation. Our findings not only described a dynamic protein network supporting fuzz initiation in diploid cotton fiber ovules, but also deepened our understanding of the molecular basis of cotton fiber initiation. Biological significance Our study reported the identification of differentially expressed proteins in wild-type diploid cotton (G. arboreum L.) and its fuzzless mutant by comparative proteomic approach. In total, 71 protein species related to fuzz initiation were identified by MS. These proteins were assigned to several functional categories, mainly in energy/carbohydrate metabolism, protein metabolism, signal transduction, redox homeostasis etc. Importantly, a number of key proteins were found to be associated with GA signaling and ROS scavenging. In consistence with these findings, we detected the increase of GM and H2O2 concentrations during fiber initiation, and our in vivo ovule experiments with GA and H2O2 injection and following microscopy observation of fuzz fiber initiation supported promoting effects of GA and H2O2 on cotton fiber initiation. These findings depicted a dynamic protein network supporting cotton fiber initiation in diploid cotton ovules. Our study is of major significance for understanding the molecular mechanisms controlling fuzz initiation and also provides a solid basis for further functional research of single nodes of this network in relation to cotton fiber initiation. (C) 2013 Elsevier B.V. All rights reserved.

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