Physiological and Biochemical Responses of four cassava cultivars to drought stress

Abstract The antioxidant mechanism is crucial for resisting oxidative damage induced by drought stress in plants. Different antioxidant mechanisms may contribute to the tolerance of cassava to drought stress, but for a specific genotype, the response is still unknown. The objective of this study was...

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Autores principales:	Yanmei Zhu, Xinglu Luo, Gul Nawaz, Jingjing Yin, Jingni Yang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f19db536ca664797bf0dfe00f7b2b257
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spelling	oai:doaj.org-article:f19db536ca664797bf0dfe00f7b2b2572021-12-02T18:27:50ZPhysiological and Biochemical Responses of four cassava cultivars to drought stress10.1038/s41598-020-63809-82045-2322https://doaj.org/article/f19db536ca664797bf0dfe00f7b2b2572020-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-63809-8https://doaj.org/toc/2045-2322Abstract The antioxidant mechanism is crucial for resisting oxidative damage induced by drought stress in plants. Different antioxidant mechanisms may contribute to the tolerance of cassava to drought stress, but for a specific genotype, the response is still unknown. The objective of this study was to investigate antioxidant response and physiological changes of four cassava genotypes under water stress conditions, by keeping the soil moisture content as 80% (control), 50% (medium), 20% (severe) of field capacity for a week. Genotypes RS01 and SC124 were keeping higher relative water content (RWC) and relative chlorophyll content (SPAD value) and less affected by oxidative stress than SC205 and GR4 under drought stress. RS01 just showed slight membrane damage and oxidative stress even under severe drought conditions. A principal component analysis showed that cassava plant water status was closely related to the antioxidant mechanism. Antioxidant response in genotypes RS01 and SC124 under drought stress might attribute to the increased accumulation of ascorbate (AsA) and glutathione (GSH) content and higher superoxide dismutase (SOD) and catalase (CAT) activities, which explained by the up-regulation of Mn-SOD and CAT genes. However, Genotypes SC205 and GR4 mainly depended on the accumulation of total phenolics (TP) and increased glutathione reductase (GR) activity, which attribute to the up-regulation of the GR gene. Our findings could provide vital knowledge for refining the tactics of cultivation and molecular breeding with drought avoidance in cassava.Yanmei ZhuXinglu LuoGul NawazJingjing YinJingni YangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-12 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yanmei Zhu Xinglu Luo Gul Nawaz Jingjing Yin Jingni Yang Physiological and Biochemical Responses of four cassava cultivars to drought stress
description	Abstract The antioxidant mechanism is crucial for resisting oxidative damage induced by drought stress in plants. Different antioxidant mechanisms may contribute to the tolerance of cassava to drought stress, but for a specific genotype, the response is still unknown. The objective of this study was to investigate antioxidant response and physiological changes of four cassava genotypes under water stress conditions, by keeping the soil moisture content as 80% (control), 50% (medium), 20% (severe) of field capacity for a week. Genotypes RS01 and SC124 were keeping higher relative water content (RWC) and relative chlorophyll content (SPAD value) and less affected by oxidative stress than SC205 and GR4 under drought stress. RS01 just showed slight membrane damage and oxidative stress even under severe drought conditions. A principal component analysis showed that cassava plant water status was closely related to the antioxidant mechanism. Antioxidant response in genotypes RS01 and SC124 under drought stress might attribute to the increased accumulation of ascorbate (AsA) and glutathione (GSH) content and higher superoxide dismutase (SOD) and catalase (CAT) activities, which explained by the up-regulation of Mn-SOD and CAT genes. However, Genotypes SC205 and GR4 mainly depended on the accumulation of total phenolics (TP) and increased glutathione reductase (GR) activity, which attribute to the up-regulation of the GR gene. Our findings could provide vital knowledge for refining the tactics of cultivation and molecular breeding with drought avoidance in cassava.
format	article
author	Yanmei Zhu Xinglu Luo Gul Nawaz Jingjing Yin Jingni Yang
author_facet	Yanmei Zhu Xinglu Luo Gul Nawaz Jingjing Yin Jingni Yang
author_sort	Yanmei Zhu
title	Physiological and Biochemical Responses of four cassava cultivars to drought stress
title_short	Physiological and Biochemical Responses of four cassava cultivars to drought stress
title_full	Physiological and Biochemical Responses of four cassava cultivars to drought stress
title_fullStr	Physiological and Biochemical Responses of four cassava cultivars to drought stress
title_full_unstemmed	Physiological and Biochemical Responses of four cassava cultivars to drought stress
title_sort	physiological and biochemical responses of four cassava cultivars to drought stress
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/f19db536ca664797bf0dfe00f7b2b257
work_keys_str_mv	AT yanmeizhu physiologicalandbiochemicalresponsesoffourcassavacultivarstodroughtstress AT xingluluo physiologicalandbiochemicalresponsesoffourcassavacultivarstodroughtstress AT gulnawaz physiologicalandbiochemicalresponsesoffourcassavacultivarstodroughtstress AT jingjingyin physiologicalandbiochemicalresponsesoffourcassavacultivarstodroughtstress AT jingniyang physiologicalandbiochemicalresponsesoffourcassavacultivarstodroughtstress
_version_	1718378015570788352

Physiological and Biochemical Responses of four cassava cultivars to drought stress

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