Evaluation of Effect of Brassinolide in <i>Brassica juncea</i> Leaves under Drought Stress in Field Conditions

Drought stress is considered to be a major factor responsible for reduced agricultural productivity, because it is often linked to other major abiotic stresses, such as salinity and heat stress. Understanding drought-tolerance mechanisms is important for crop improvement. Moreover, under drought con...

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Autores principales:	Naveen Naveen, Nisha Kumari, Ram Avtar, Minakshi Jattan, Sushil Ahlawat, Babita Rani, Kamla Malik, Anubhuti Sharma, Manjeet Singh
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	antioxidants <i>Brassica juncea</i> brassinolide drought stress proline Plant culture SB1-1110
Acceso en línea:	https://doaj.org/article/508d54b36fb5433d98d9e0056951f7db
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spelling	oai:doaj.org-article:508d54b36fb5433d98d9e0056951f7db2021-11-25T17:47:47ZEvaluation of Effect of Brassinolide in <i>Brassica juncea</i> Leaves under Drought Stress in Field Conditions10.3390/horticulturae71105142311-7524https://doaj.org/article/508d54b36fb5433d98d9e0056951f7db2021-11-01T00:00:00Zhttps://www.mdpi.com/2311-7524/7/11/514https://doaj.org/toc/2311-7524Drought stress is considered to be a major factor responsible for reduced agricultural productivity, because it is often linked to other major abiotic stresses, such as salinity and heat stress. Understanding drought-tolerance mechanisms is important for crop improvement. Moreover, under drought conditions, it is possible that growth regulators are able to protect the plants. Brassinosteroids not only play a regulatory role in plant growth, but also organize defense mechanisms against various tresses. This study aimed to evaluate the effect of brassinolide on physio-biochemical amendment in two contrasting cultivars (drought-tolerant RH 725, and drought-sensitive RH 749) of <i>Brassica juncea</i> under drought stress. Two foliar sprayings with brassinolide (10 and 20 mg/L) were carried out in both cultivars (RH 725 and RH 749) at two stages—i.e., flower initiation, and 50% flowering—under stress conditions. The results clearly revealed that the activities of antioxidative enzymes and non-enzymatic antioxidants (carotenoids, ascorbic acid, and proline) increased significantly in RH 725 at 50% flowering, whereas 20 mg/L of brassinolide showed the most promising response. The different oxidative stress indicators (i.e., hydrogen peroxide, malondialdehyde, and electrolyte leakage) decreased to a significant extent at 20 mg/L of brassinolide spray in RH 725 at 50% flowering. This study indicates that brassinolide intensifies the physio-biochemical attributes by improving the antioxidant system and photosynthetic efficiency in RH 725 at 50% flowering. It is assumed that enhanced production of proline, improvement of the antioxidant system, and reduction in the amount of stress indicators impart strength to the plants to combat the stress conditions.Naveen NaveenNisha KumariRam AvtarMinakshi JattanSushil AhlawatBabita RaniKamla MalikAnubhuti SharmaManjeet SinghMDPI AGarticleantioxidants<i>Brassica juncea</i>brassinolidedrought stressprolinePlant cultureSB1-1110ENHorticulturae, Vol 7, Iss 514, p 514 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	antioxidants <i>Brassica juncea</i> brassinolide drought stress proline Plant culture SB1-1110
spellingShingle	antioxidants <i>Brassica juncea</i> brassinolide drought stress proline Plant culture SB1-1110 Naveen Naveen Nisha Kumari Ram Avtar Minakshi Jattan Sushil Ahlawat Babita Rani Kamla Malik Anubhuti Sharma Manjeet Singh Evaluation of Effect of Brassinolide in <i>Brassica juncea</i> Leaves under Drought Stress in Field Conditions
description	Drought stress is considered to be a major factor responsible for reduced agricultural productivity, because it is often linked to other major abiotic stresses, such as salinity and heat stress. Understanding drought-tolerance mechanisms is important for crop improvement. Moreover, under drought conditions, it is possible that growth regulators are able to protect the plants. Brassinosteroids not only play a regulatory role in plant growth, but also organize defense mechanisms against various tresses. This study aimed to evaluate the effect of brassinolide on physio-biochemical amendment in two contrasting cultivars (drought-tolerant RH 725, and drought-sensitive RH 749) of <i>Brassica juncea</i> under drought stress. Two foliar sprayings with brassinolide (10 and 20 mg/L) were carried out in both cultivars (RH 725 and RH 749) at two stages—i.e., flower initiation, and 50% flowering—under stress conditions. The results clearly revealed that the activities of antioxidative enzymes and non-enzymatic antioxidants (carotenoids, ascorbic acid, and proline) increased significantly in RH 725 at 50% flowering, whereas 20 mg/L of brassinolide showed the most promising response. The different oxidative stress indicators (i.e., hydrogen peroxide, malondialdehyde, and electrolyte leakage) decreased to a significant extent at 20 mg/L of brassinolide spray in RH 725 at 50% flowering. This study indicates that brassinolide intensifies the physio-biochemical attributes by improving the antioxidant system and photosynthetic efficiency in RH 725 at 50% flowering. It is assumed that enhanced production of proline, improvement of the antioxidant system, and reduction in the amount of stress indicators impart strength to the plants to combat the stress conditions.
format	article
author	Naveen Naveen Nisha Kumari Ram Avtar Minakshi Jattan Sushil Ahlawat Babita Rani Kamla Malik Anubhuti Sharma Manjeet Singh
author_facet	Naveen Naveen Nisha Kumari Ram Avtar Minakshi Jattan Sushil Ahlawat Babita Rani Kamla Malik Anubhuti Sharma Manjeet Singh
author_sort	Naveen Naveen
title	Evaluation of Effect of Brassinolide in <i>Brassica juncea</i> Leaves under Drought Stress in Field Conditions
title_short	Evaluation of Effect of Brassinolide in <i>Brassica juncea</i> Leaves under Drought Stress in Field Conditions
title_full	Evaluation of Effect of Brassinolide in <i>Brassica juncea</i> Leaves under Drought Stress in Field Conditions
title_fullStr	Evaluation of Effect of Brassinolide in <i>Brassica juncea</i> Leaves under Drought Stress in Field Conditions
title_full_unstemmed	Evaluation of Effect of Brassinolide in <i>Brassica juncea</i> Leaves under Drought Stress in Field Conditions
title_sort	evaluation of effect of brassinolide in <i>brassica juncea</i> leaves under drought stress in field conditions
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/508d54b36fb5433d98d9e0056951f7db
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Evaluation of Effect of Brassinolide in <i>Brassica juncea</i> Leaves under Drought Stress in Field Conditions

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