Glycinebetaine mitigates drought stress-induced oxidative damage in pears

Glycinebetaine (GB) is an osmoprotectant found in plants under environmental stresses that incorporates drought and is associated with drought tolerance in several plants, such as the woody pear. However, how GB improves drought tolerance in pears remains unclear. In the current study, we explored t...

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Autores principales:	Tiequan Niu, Tianpeng Zhang, Yue Qiao, Pengfei Wen, Guangqian Zhai, Enke Liu, Dhafer A. Al-Bakre, Mohammad S. Al-Harbi, Xiuping Gao, Xinghong Yang
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a6bb7f0f371d476198b0a348dcaf3d20
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spelling	oai:doaj.org-article:a6bb7f0f371d476198b0a348dcaf3d202021-11-25T06:19:41ZGlycinebetaine mitigates drought stress-induced oxidative damage in pears1932-6203https://doaj.org/article/a6bb7f0f371d476198b0a348dcaf3d202021-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC8601463/?tool=EBIhttps://doaj.org/toc/1932-6203Glycinebetaine (GB) is an osmoprotectant found in plants under environmental stresses that incorporates drought and is associated with drought tolerance in several plants, such as the woody pear. However, how GB improves drought tolerance in pears remains unclear. In the current study, we explored the mechanism by which GB enhances drought tolerance of whole pear plants (Pyrus bretschneideri Redh. cv. Suli) supplied with exogenous GB. The results showed that on the sixth day after withholding water, levels of O2·−, H2O2, malonaldehyde (MDA) and electrolyte leakage in the leaves were substantially increased by 143%, 38%, 134% and 155%, respectively. Exogenous GB treatment was substantially reduced O2·−, H2O2, MDA and electrolyte leakage (38%, 24%, 38% and 36%, respectively) in drought-stressed leaves. Furthermore, exogenous GB induced considerably higher antioxidant enzyme activity in dry-stressed leaves than drought-stressed treatment alone on the sixth day after withholding water, such as superoxide dismutase (SOD) (201%) and peroxidase (POD) (127%). In addition, these GB-induced phenomena led to increased endogenous GB levels in the leaves of the GB 100 + drought and GB 500 + drought treatment groups by 30% and 78%, respectively, compared to drought treatment alone. The findings obtained were confirmed by the results of the disconnected leaf tests, in which GB contributed to a substantial increase in SOD activity and parallel dose- and time-based decreases in MDA levels. These results demonstrate that GB-conferred drought resistance in pears may be due in part to minimizing symptoms of oxidative harm incurred in response to drought by the activities of antioxidants and by reducing the build-up of ROS and lipid peroxidation.Tiequan NiuTianpeng ZhangYue QiaoPengfei WenGuangqian ZhaiEnke LiuDhafer A. Al-BakreMohammad S. Al-HarbiXiuping GaoXinghong YangPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Tiequan Niu Tianpeng Zhang Yue Qiao Pengfei Wen Guangqian Zhai Enke Liu Dhafer A. Al-Bakre Mohammad S. Al-Harbi Xiuping Gao Xinghong Yang Glycinebetaine mitigates drought stress-induced oxidative damage in pears
description	Glycinebetaine (GB) is an osmoprotectant found in plants under environmental stresses that incorporates drought and is associated with drought tolerance in several plants, such as the woody pear. However, how GB improves drought tolerance in pears remains unclear. In the current study, we explored the mechanism by which GB enhances drought tolerance of whole pear plants (Pyrus bretschneideri Redh. cv. Suli) supplied with exogenous GB. The results showed that on the sixth day after withholding water, levels of O2·−, H2O2, malonaldehyde (MDA) and electrolyte leakage in the leaves were substantially increased by 143%, 38%, 134% and 155%, respectively. Exogenous GB treatment was substantially reduced O2·−, H2O2, MDA and electrolyte leakage (38%, 24%, 38% and 36%, respectively) in drought-stressed leaves. Furthermore, exogenous GB induced considerably higher antioxidant enzyme activity in dry-stressed leaves than drought-stressed treatment alone on the sixth day after withholding water, such as superoxide dismutase (SOD) (201%) and peroxidase (POD) (127%). In addition, these GB-induced phenomena led to increased endogenous GB levels in the leaves of the GB 100 + drought and GB 500 + drought treatment groups by 30% and 78%, respectively, compared to drought treatment alone. The findings obtained were confirmed by the results of the disconnected leaf tests, in which GB contributed to a substantial increase in SOD activity and parallel dose- and time-based decreases in MDA levels. These results demonstrate that GB-conferred drought resistance in pears may be due in part to minimizing symptoms of oxidative harm incurred in response to drought by the activities of antioxidants and by reducing the build-up of ROS and lipid peroxidation.
format	article
author	Tiequan Niu Tianpeng Zhang Yue Qiao Pengfei Wen Guangqian Zhai Enke Liu Dhafer A. Al-Bakre Mohammad S. Al-Harbi Xiuping Gao Xinghong Yang
author_facet	Tiequan Niu Tianpeng Zhang Yue Qiao Pengfei Wen Guangqian Zhai Enke Liu Dhafer A. Al-Bakre Mohammad S. Al-Harbi Xiuping Gao Xinghong Yang
author_sort	Tiequan Niu
title	Glycinebetaine mitigates drought stress-induced oxidative damage in pears
title_short	Glycinebetaine mitigates drought stress-induced oxidative damage in pears
title_full	Glycinebetaine mitigates drought stress-induced oxidative damage in pears
title_fullStr	Glycinebetaine mitigates drought stress-induced oxidative damage in pears
title_full_unstemmed	Glycinebetaine mitigates drought stress-induced oxidative damage in pears
title_sort	glycinebetaine mitigates drought stress-induced oxidative damage in pears
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/a6bb7f0f371d476198b0a348dcaf3d20
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Glycinebetaine mitigates drought stress-induced oxidative damage in pears

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