Pumpkin (Cucurbita moschata) HSP20 Gene Family Identification and Expression Under Heat Stress
文献类型： 外文期刊
作者： Hu, Yanping 1 ; Zhang, Tingting 2 ; Liu, Ying 2 ; Li, Yuxin 2 ; Wang, Min 1 ; Zhu, Baibi 1 ; Liao, Daolong 1 ; Yun, Tianh 1 ;
作者机构： 1.Hainan Acad Agr Sci, Hainan Vegetable Breeding Engn Technol Res Ctr, Inst Vegetables, Key Lab Vegetable Biol Hainan Prov, Haikou, Hainan, Peoples R China
2.Hainan Univ, Sch Hort, Key Lab Qual Regulat Trop Hort Crops Hainan Prov, Haikou, Hainan, Peoples R China
关键词： Cucurbita moschata; heat shock protein 20; gene family; gene expression; heat stress
期刊名称：FRONTIERS IN GENETICS （ 影响因子：4.599； 五年影响因子：4.888 ）
ISSN：
年卷期： 2021 年 12 卷
页码：
收录情况： SCI
摘要： Pumpkin (Cucurbita moschata) is an important cucurbit vegetable crop that has strong resistance to abiotic stress. While heat shock protein 20 (HSP20) has been implicated in vegetable response to heat stress, little is known regarding activity of HSP20 family proteins in C. moschata. Here, we performed a comprehensive genome-wide analysis to identify and characterize the functional dynamics of the Cucurbita moschata HSP20 (CmoHSP20) gene family. A total of 33 HSP20 genes distributed across 13 chromosomes were identified from the pumpkin genome. Our phylogenetic analysis determined that the CmoHSP20 proteins fell into nine distinct subfamilies, a division supported by the conserved motif composition and gene structure analyses. Segmental duplication events were shown to play a key role in expansion of the CmoHSP20 gene family. Synteny analysis revealed that 19 and 18 CmoHSP20 genes were collinear with those in the cucumber and melon genomes, respectively. Furthermore, the expression levels of pumpkin HSP20 genes were differentially induced by heat stress. The transcript level of CmoHSP20-16, 24 and 25 were down-regulated by heat stress, while CmoHSP20-7, 13, 18, 22, 26 and 32 were up-regulated by heat stress, which could be used as heat tolerance candidate genes. Overall, these findings contribute to our understanding of vegetable HSP20 family genes and provide valuable information that can be used to breed heat stress resistance in cucurbit vegetable crops.
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