Proteomic variations after short-term heat shock treatment reveal differentially expressed proteins involved in early microspore embryogenesis in cabbage (Brassica oleracea)

文献类型： 外文期刊

第一作者： Su, Henan

作者： Su, Henan;Chen, Guo;Fang, Zhiyuan;Su, Henan;Chen, Guo;Yang, Limei;Zhang, Yangyong;Wang, Yong;Fang, Zhiyuan;Lv, Honghao

作者机构：

关键词： Cabbage; Microspore culture; Embryogenesis; Heat shock treatment; Proteomics

期刊名称：PEERJ （ 影响因子：2.984； 五年影响因子：3.369 ）

ISSN： 2167-8359

年卷期： 2020 年 8 卷

页码：

收录情况： SCI

摘要： Microspore embryogenesis (ME), a widely used haploid breeding method that can considerably shorten the breeding cycle, provides an efficient mean of cultivating many important Brassica crops, such as cabbage, Chinese cabbage, and oilseed rape. For cabbage, in many cases, short-term heat shock treatment can strongly increase the embryogenesis rate, however, the underlying mechanism of this effect has not been elucidated. In this study, we compared the proteomics of isolated microspores with samples pretreated at 32 degrees C for 24 h and 25 degrees C for 24 h using two cabbage accessions (Zhonggan 628 and 87-534) showing highly different embryogenic rates. The embryo yield was 19.7 embryos/bud in Zhonggan 628 after 32 degrees C treatment, while no embryoid was observed in Zhonggan 628 after 25 degrees C treatment as well as in 87-534 at both temperatures. We identified a total of 363 and 282 differentially expressed proteins (DEPs) for Zhonggan 628 and 87-534 via a label-free proteomics technology. There were 97 DEPs specifically identified only in Zhonggan 628 but not in 87-534 after 32 degrees C heat-shock treatment that may be related to heat shock-induced embryogenesis in vitro culture. These DEPs were primarily enriched in carbon metabolic process, protein synthesis and degradation process, and signal transduction. Based on protein-protein interaction and pathway enrichment analyses, we proposed that SGT1 homolog A and B(SGT1), heat shock 70 kDa protein 5 (HSP70), cell division control protein 48 homolog A (CDC48) and fatty acyl-CoA reductase (FAR) might play important roles in microspore embryogenesis. This proteomic study may contribute to our molecular understanding of cabbage microspore embryogenesis and help to build a high-efficiency haploid breeding system.

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