Identification of Glutathione Peroxidase Gene Family in Ricinus communis and Functional Characterization of RcGPX4 in Cold Tolerance

Glutathione peroxidases (GPXs) protect cells against damage caused by reactive oxygen species (ROS) and play key roles in regulating many biological processes. Here, five GPXs were identified in the Ricinus communis genome. Phylogenetic analysis displayed that the GPXs were categorized into five gro...

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Autores principales:	Xiaoyu Wang, Xuming Liu, Yong-qiang Charles An, Hongyu Zhang, Di Meng, Yanan Jin, Hongyan Huo, Lili Yu, Jixing Zhang
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	Ricinus communis L. genome-wide identification RcGPX4 functional analysis cold tolerance Plant culture SB1-1110
Acceso en línea:	https://doaj.org/article/204560457bc3478e8b535d9407f877e0
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spelling	oai:doaj.org-article:204560457bc3478e8b535d9407f877e02021-11-05T13:40:07ZIdentification of Glutathione Peroxidase Gene Family in Ricinus communis and Functional Characterization of RcGPX4 in Cold Tolerance1664-462X10.3389/fpls.2021.707127https://doaj.org/article/204560457bc3478e8b535d9407f877e02021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fpls.2021.707127/fullhttps://doaj.org/toc/1664-462XGlutathione peroxidases (GPXs) protect cells against damage caused by reactive oxygen species (ROS) and play key roles in regulating many biological processes. Here, five GPXs were identified in the Ricinus communis genome. Phylogenetic analysis displayed that the GPXs were categorized into five groups. Conserved domain and gene structure analyses showed that the GPXs from different plant species harbored four highly similar motifs and conserved exon-intron arrangement patterns, indicating that their structure and function may have been conserved during evolution. Several abiotic stresses and hormone-responsive cis-acting elements existed in the promoters of the RcGPXs. The expression profiles indicated that the RcGPXs varied substantially, and some RcGPXs were coordinately regulated under abiotic stresses. Overexpression of RcGPX4 in Arabidopsis enhanced cold tolerance at seed germination but reduced freezing tolerance at seedlings. The expression of abscisic acid (ABA) signaling genes (AtABI4 and AtABI5), ABA catabolism genes (AtCYP707A1 and AtCYP707A2), gibberellin acid (GA) catabolism gene (AtGA2ox7), and cytokinin (CTK)-inducible gene (AtARR6) was regulated in the seeds of transgenic lines under cold stress. Overexpression of RcGPX4 can disturb the hydrogen peroxide (H2O2) homeostasis through the modulation of some antioxidant enzymes and compounds involved in the GSH-ascorbate cycle in transgenic plants. Additionally, RcGPX4 depended on the MAPK3-ICE1-C-repeat-binding factor (CBF)-COR signal transduction pathway and ABA-dependent pathway to negatively regulate the freezing tolerance of transgenic plants. This study provides valuable information for understanding the potential function of RcGPXs in regulating the abiotic stress responses of castor beans.Xiaoyu WangXiaoyu WangXuming LiuXuming LiuYong-qiang Charles AnHongyu ZhangHongyu ZhangDi MengDi MengYanan JinYanan JinHongyan HuoHongyan HuoLili YuJixing ZhangJixing ZhangFrontiers Media S.A.articleRicinus communis L.genome-wide identificationRcGPX4functional analysiscold tolerancePlant cultureSB1-1110ENFrontiers in Plant Science, Vol 12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Ricinus communis L. genome-wide identification RcGPX4 functional analysis cold tolerance Plant culture SB1-1110
spellingShingle	Ricinus communis L. genome-wide identification RcGPX4 functional analysis cold tolerance Plant culture SB1-1110 Xiaoyu Wang Xiaoyu Wang Xuming Liu Xuming Liu Yong-qiang Charles An Hongyu Zhang Hongyu Zhang Di Meng Di Meng Yanan Jin Yanan Jin Hongyan Huo Hongyan Huo Lili Yu Jixing Zhang Jixing Zhang Identification of Glutathione Peroxidase Gene Family in Ricinus communis and Functional Characterization of RcGPX4 in Cold Tolerance
description	Glutathione peroxidases (GPXs) protect cells against damage caused by reactive oxygen species (ROS) and play key roles in regulating many biological processes. Here, five GPXs were identified in the Ricinus communis genome. Phylogenetic analysis displayed that the GPXs were categorized into five groups. Conserved domain and gene structure analyses showed that the GPXs from different plant species harbored four highly similar motifs and conserved exon-intron arrangement patterns, indicating that their structure and function may have been conserved during evolution. Several abiotic stresses and hormone-responsive cis-acting elements existed in the promoters of the RcGPXs. The expression profiles indicated that the RcGPXs varied substantially, and some RcGPXs were coordinately regulated under abiotic stresses. Overexpression of RcGPX4 in Arabidopsis enhanced cold tolerance at seed germination but reduced freezing tolerance at seedlings. The expression of abscisic acid (ABA) signaling genes (AtABI4 and AtABI5), ABA catabolism genes (AtCYP707A1 and AtCYP707A2), gibberellin acid (GA) catabolism gene (AtGA2ox7), and cytokinin (CTK)-inducible gene (AtARR6) was regulated in the seeds of transgenic lines under cold stress. Overexpression of RcGPX4 can disturb the hydrogen peroxide (H2O2) homeostasis through the modulation of some antioxidant enzymes and compounds involved in the GSH-ascorbate cycle in transgenic plants. Additionally, RcGPX4 depended on the MAPK3-ICE1-C-repeat-binding factor (CBF)-COR signal transduction pathway and ABA-dependent pathway to negatively regulate the freezing tolerance of transgenic plants. This study provides valuable information for understanding the potential function of RcGPXs in regulating the abiotic stress responses of castor beans.
format	article
author	Xiaoyu Wang Xiaoyu Wang Xuming Liu Xuming Liu Yong-qiang Charles An Hongyu Zhang Hongyu Zhang Di Meng Di Meng Yanan Jin Yanan Jin Hongyan Huo Hongyan Huo Lili Yu Jixing Zhang Jixing Zhang
author_facet	Xiaoyu Wang Xiaoyu Wang Xuming Liu Xuming Liu Yong-qiang Charles An Hongyu Zhang Hongyu Zhang Di Meng Di Meng Yanan Jin Yanan Jin Hongyan Huo Hongyan Huo Lili Yu Jixing Zhang Jixing Zhang
author_sort	Xiaoyu Wang
title	Identification of Glutathione Peroxidase Gene Family in Ricinus communis and Functional Characterization of RcGPX4 in Cold Tolerance
title_short	Identification of Glutathione Peroxidase Gene Family in Ricinus communis and Functional Characterization of RcGPX4 in Cold Tolerance
title_full	Identification of Glutathione Peroxidase Gene Family in Ricinus communis and Functional Characterization of RcGPX4 in Cold Tolerance
title_fullStr	Identification of Glutathione Peroxidase Gene Family in Ricinus communis and Functional Characterization of RcGPX4 in Cold Tolerance
title_full_unstemmed	Identification of Glutathione Peroxidase Gene Family in Ricinus communis and Functional Characterization of RcGPX4 in Cold Tolerance
title_sort	identification of glutathione peroxidase gene family in ricinus communis and functional characterization of rcgpx4 in cold tolerance
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/204560457bc3478e8b535d9407f877e0
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Identification of Glutathione Peroxidase Gene Family in Ricinus communis and Functional Characterization of RcGPX4 in Cold Tolerance

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