Massive expansion and differential evolution of small heat shock proteins with wheat (Triticum aestivum L.) polyploidization

Abstract Wheat (Triticum aestivum), one of the world’s most important crops, is facing unprecedented challenges due to global warming. To evaluate the gene resources for heat adaptation in hexaploid wheat, small heat shock proteins (sHSPs), the key plant heat protection genes, were comprehensively a...

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Autores principales:	Xiaoming Wang, Ruochen Wang, Chuang Ma, Xue Shi, Zhenshan Liu, Zhonghua Wang, Qixin Sun, Jun Cao, Shengbao Xu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/3617ee9513634cfbbcf58e97e9d13b73
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spelling	oai:doaj.org-article:3617ee9513634cfbbcf58e97e9d13b732021-12-02T12:32:50ZMassive expansion and differential evolution of small heat shock proteins with wheat (Triticum aestivum L.) polyploidization10.1038/s41598-017-01857-32045-2322https://doaj.org/article/3617ee9513634cfbbcf58e97e9d13b732017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-01857-3https://doaj.org/toc/2045-2322Abstract Wheat (Triticum aestivum), one of the world’s most important crops, is facing unprecedented challenges due to global warming. To evaluate the gene resources for heat adaptation in hexaploid wheat, small heat shock proteins (sHSPs), the key plant heat protection genes, were comprehensively analysed in wheat and related species. We found that the sHSPs of hexaploid wheat were massively expanded in A and B subgenomes with intrachromosomal duplications during polyploidization. These expanded sHSPs were under similar purifying selection and kept the expressional patterns with the original copies. Generally, a strong purifying selection acted on the α-crystallin domain (ACD) and theoretically constrain conserved function. Meanwhile, weaker purifying selection and strong positive selection acted on the N-terminal region, which conferred sHSP flexibility, allowing adjustments to a wider range of substrates in response to genomic and environmental changes. Notably, in CI, CV, ER, MI and MII subfamilies, gene duplications, expression variations and functional divergence occurred before wheat polyploidization. Our results indicate the massive expansion of active sHSPs in hexaploid wheat may also provide more raw materials for evolving functional novelties and generating genetic diversity to face future global climate changes, and highlight the expansion of stress response genes with wheat polyploidization.Xiaoming WangRuochen WangChuang MaXue ShiZhenshan LiuZhonghua WangQixin SunJun CaoShengbao XuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-12 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Xiaoming Wang Ruochen Wang Chuang Ma Xue Shi Zhenshan Liu Zhonghua Wang Qixin Sun Jun Cao Shengbao Xu Massive expansion and differential evolution of small heat shock proteins with wheat (Triticum aestivum L.) polyploidization
description	Abstract Wheat (Triticum aestivum), one of the world’s most important crops, is facing unprecedented challenges due to global warming. To evaluate the gene resources for heat adaptation in hexaploid wheat, small heat shock proteins (sHSPs), the key plant heat protection genes, were comprehensively analysed in wheat and related species. We found that the sHSPs of hexaploid wheat were massively expanded in A and B subgenomes with intrachromosomal duplications during polyploidization. These expanded sHSPs were under similar purifying selection and kept the expressional patterns with the original copies. Generally, a strong purifying selection acted on the α-crystallin domain (ACD) and theoretically constrain conserved function. Meanwhile, weaker purifying selection and strong positive selection acted on the N-terminal region, which conferred sHSP flexibility, allowing adjustments to a wider range of substrates in response to genomic and environmental changes. Notably, in CI, CV, ER, MI and MII subfamilies, gene duplications, expression variations and functional divergence occurred before wheat polyploidization. Our results indicate the massive expansion of active sHSPs in hexaploid wheat may also provide more raw materials for evolving functional novelties and generating genetic diversity to face future global climate changes, and highlight the expansion of stress response genes with wheat polyploidization.
format	article
author	Xiaoming Wang Ruochen Wang Chuang Ma Xue Shi Zhenshan Liu Zhonghua Wang Qixin Sun Jun Cao Shengbao Xu
author_facet	Xiaoming Wang Ruochen Wang Chuang Ma Xue Shi Zhenshan Liu Zhonghua Wang Qixin Sun Jun Cao Shengbao Xu
author_sort	Xiaoming Wang
title	Massive expansion and differential evolution of small heat shock proteins with wheat (Triticum aestivum L.) polyploidization
title_short	Massive expansion and differential evolution of small heat shock proteins with wheat (Triticum aestivum L.) polyploidization
title_full	Massive expansion and differential evolution of small heat shock proteins with wheat (Triticum aestivum L.) polyploidization
title_fullStr	Massive expansion and differential evolution of small heat shock proteins with wheat (Triticum aestivum L.) polyploidization
title_full_unstemmed	Massive expansion and differential evolution of small heat shock proteins with wheat (Triticum aestivum L.) polyploidization
title_sort	massive expansion and differential evolution of small heat shock proteins with wheat (triticum aestivum l.) polyploidization
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/3617ee9513634cfbbcf58e97e9d13b73
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Massive expansion and differential evolution of small heat shock proteins with wheat (Triticum aestivum L.) polyploidization

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