Differential responses of antioxidants and osmolytes in upland cotton (Gossypium hirsutum) cultivars contrasting in drought tolerance

Major abiotic stresses affecting growth and metabolism of plants include heat and drought or water stress. In cotton, drought stress leads to limited plant growth and productivity that results in significant yield losses – up to 30% worldwide. Therefore, the present study was carried out in cotton t...

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Autores principales:	C.K. Singh, B.K. Rajkumar, V. Kumar
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Abiotic stress Osmotic potential Proline Catalase Glycine betaine Plant ecology QK900-989
Acceso en línea:	https://doaj.org/article/15f155f8820149edaa447de3724074a2
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spelling	oai:doaj.org-article:15f155f8820149edaa447de3724074a22021-12-04T04:36:37ZDifferential responses of antioxidants and osmolytes in upland cotton (Gossypium hirsutum) cultivars contrasting in drought tolerance2667-064X10.1016/j.stress.2021.100031https://doaj.org/article/15f155f8820149edaa447de3724074a22021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2667064X21000300https://doaj.org/toc/2667-064XMajor abiotic stresses affecting growth and metabolism of plants include heat and drought or water stress. In cotton, drought stress leads to limited plant growth and productivity that results in significant yield losses – up to 30% worldwide. Therefore, the present study was carried out in cotton to examine the changes in growth, physiological, and oxidative stress mechanisms in response to drought stress. Our results revealed a significant (P<0.05) decline in growth parameters such as plant height (cm), root length (cm), and relative water content (RWC) caused by drought stress. However, a significant increase (P<0.05) was observed in osmotic potential (OP), electrolyte leakage (EL), glycine betaine (GB) content, lipid peroxidation, proline content, and antioxidant enzyme activity. Two tolerant cultivars, G.Cot.16 x H-1353/10 and H-1353/10 x G.Cot.16, indicated no significant decrease in physio-biochemical traits, whereas sensitive genotypes were markedly affected during drought stress. The activity of antioxidant enzymes, such as catalase and peroxidase, increased markedly among the tolerant cultivars, but decreased in sensitive cultivars. Thus, it can be inferred that short-term drought stress severely disrupted cotton growth and metabolism, and that the apparent osmolyte accumulation and enzymatic mechanism played a critical role in protecting plants against oxidative damage.C.K. SinghB.K. RajkumarV. KumarElsevierarticleAbiotic stressOsmotic potentialProlineCatalaseGlycine betainePlant ecologyQK900-989ENPlant Stress, Vol 2, Iss , Pp 100031- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Abiotic stress Osmotic potential Proline Catalase Glycine betaine Plant ecology QK900-989
spellingShingle	Abiotic stress Osmotic potential Proline Catalase Glycine betaine Plant ecology QK900-989 C.K. Singh B.K. Rajkumar V. Kumar Differential responses of antioxidants and osmolytes in upland cotton (Gossypium hirsutum) cultivars contrasting in drought tolerance
description	Major abiotic stresses affecting growth and metabolism of plants include heat and drought or water stress. In cotton, drought stress leads to limited plant growth and productivity that results in significant yield losses – up to 30% worldwide. Therefore, the present study was carried out in cotton to examine the changes in growth, physiological, and oxidative stress mechanisms in response to drought stress. Our results revealed a significant (P<0.05) decline in growth parameters such as plant height (cm), root length (cm), and relative water content (RWC) caused by drought stress. However, a significant increase (P<0.05) was observed in osmotic potential (OP), electrolyte leakage (EL), glycine betaine (GB) content, lipid peroxidation, proline content, and antioxidant enzyme activity. Two tolerant cultivars, G.Cot.16 x H-1353/10 and H-1353/10 x G.Cot.16, indicated no significant decrease in physio-biochemical traits, whereas sensitive genotypes were markedly affected during drought stress. The activity of antioxidant enzymes, such as catalase and peroxidase, increased markedly among the tolerant cultivars, but decreased in sensitive cultivars. Thus, it can be inferred that short-term drought stress severely disrupted cotton growth and metabolism, and that the apparent osmolyte accumulation and enzymatic mechanism played a critical role in protecting plants against oxidative damage.
format	article
author	C.K. Singh B.K. Rajkumar V. Kumar
author_facet	C.K. Singh B.K. Rajkumar V. Kumar
author_sort	C.K. Singh
title	Differential responses of antioxidants and osmolytes in upland cotton (Gossypium hirsutum) cultivars contrasting in drought tolerance
title_short	Differential responses of antioxidants and osmolytes in upland cotton (Gossypium hirsutum) cultivars contrasting in drought tolerance
title_full	Differential responses of antioxidants and osmolytes in upland cotton (Gossypium hirsutum) cultivars contrasting in drought tolerance
title_fullStr	Differential responses of antioxidants and osmolytes in upland cotton (Gossypium hirsutum) cultivars contrasting in drought tolerance
title_full_unstemmed	Differential responses of antioxidants and osmolytes in upland cotton (Gossypium hirsutum) cultivars contrasting in drought tolerance
title_sort	differential responses of antioxidants and osmolytes in upland cotton (gossypium hirsutum) cultivars contrasting in drought tolerance
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/15f155f8820149edaa447de3724074a2
work_keys_str_mv	AT cksingh differentialresponsesofantioxidantsandosmolytesinuplandcottongossypiumhirsutumcultivarscontrastingindroughttolerance AT bkrajkumar differentialresponsesofantioxidantsandosmolytesinuplandcottongossypiumhirsutumcultivarscontrastingindroughttolerance AT vkumar differentialresponsesofantioxidantsandosmolytesinuplandcottongossypiumhirsutumcultivarscontrastingindroughttolerance
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Differential responses of antioxidants and osmolytes in upland cotton (Gossypium hirsutum) cultivars contrasting in drought tolerance

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