Brassinosteroids are Potential Ameliorators of Heavy Metal Stresses in Plants

Vardhini, B. Vidya

doi:10.1016/b978-0-12-803158-2.00008-4

Cited by 18 publications

(11 citation statements)

References 169 publications

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“…During oxidative stress, several plant hormones play a key role. BRs, however, not only regulate different physiological and morphogenetic responses in plants but also help in reducing various biotic and abiotic stresses ( Krishna, 2003 ; Bajguz and Hayat, 2009 ; Vardhini, 2016 ).…”

Section: Brassinosteroids Vs Heavy Metal Stressmentioning

confidence: 99%

Brassinosteroids and Response of Plants to Heavy Metals Action

2016

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Brassinosteroids (BRs) are a widespread group of plant hormones. These phytohormones play a crucial role in the regulation of growth and development of various plant species, and they demonstrate high biological activity. BRs are considered to demonstrate protective activity in the plants exposed to various stresses. Due to rapid industrialization and urbanization, heavy metals have become one of the most important plant stressors. In plants, accumulation of heavy metals beyond the critical levels leads to oxidative stress. However, BRs may inhibit the degradation of lipids, resulted from the overproduction of reactive oxygen species under stress conditions, and increase the activity of antioxidants. They also have the ability to promote phytochelatins synthesis.

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Section: Brassinosteroids Vs Heavy Metal Stressmentioning

confidence: 99%

Brassinosteroids and Response of Plants to Heavy Metals Action

2016

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“…BRs can also reduce the accumulation and uptake of heavy metals, which was shown in a study on Brassica juncea seeds exposed to Cu, where the results indicated that BRs improved shoot and biomass production and decreased the accumulation and uptake of copper in plants [62]. The results of previous studies have indicated that BR has a strong impact on plant growth and biomass, which was specifically reported for mung beans exposed to aluminum stress [56][57][58][59][60][61][62][63]. BR also plays a vital role in the regulation of the elongation of shoots and roots, as well as seed germination [64].…”

Section: Brassinosteroids (Brs) Via Heavy Metal Stressmentioning

confidence: 72%

“…Many studies have reported that BRs can decrease heavy metal stress in plants [52-59-60]. In plants exposed to heavy metals, BRs as a regulator play an essential role in the morphogenetic and physiological responses that can reduce biotic and abiotic stresses [61]. BRs can also reduce the accumulation and uptake of heavy metals, which was shown in a study on Brassica juncea seeds exposed to Cu, where the results indicated that BRs improved shoot and biomass production and decreased the accumulation and uptake of copper in plants [62].…”

Section: Brassinosteroids (Brs) Via Heavy Metal Stressmentioning

confidence: 99%

“…Thus, the BR1 encoded protein complex (leucine-rich repeat receptor-like kinase) that is conducted through the signaling network by related genes can regulate plant responses to stress [66]. Therefore, BRs can regulate the expression of various genes responsible for encoding plant defense mechanisms including phytochelatins (PCs), antioxidant enzymes [60][61][62][63][64][65][66][67] and metallothioneins (MTs) [52]. BRs can facilitate and stimulate the syntheses of phytochelatins (PCs) in the plant cell in heavy metal stress conditions, which has been reported in plants exposed to Pb [68].…”

Section: Brassinosteroids (Brs) Via Heavy Metal Stressmentioning

confidence: 99%

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The Role of New Members of Phytohormones in Plant Amelioration under Abiotic Stress with an Emphasis on Heavy Metals

Emamverdian¹,

Ding²,

Xie³

2020

Pol. J. Environ. Stud.

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In addition to regulating plant growth and development, phytohormones play an essential role in the response to abiotic and biotic stress-especially heavy metal stress. In response to environmental stressors, phytohormones act as signaling molecules in both exogenous and endogenous signaling pathways. In parts of the rhizosphere, phytohormones have an exogenous role, and when regulating plant growth and development, they have an endogenous role. Phytohormones and their associated signaling pathway network are involved in plant responses to heavy metal stress. These molecules can improve the plant defense system by increasing antioxidant enzyme activity and degrading lipoperoxidation and H 2 O 2. Phytohormones are divided into classical phytohormones such as auxins, ethylene, gibberellins, and cytokinins, that have been investigated for many years and the new members, such as jasmonates, brassinosteroids, and strigolactones, which have been little studied. In this review article, we investigated the main mechanisms involved in the amelioration of heavy metals by the three new phytohormones to provide more knowledge about their detoxification mechanisms.

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“…Through metal contaminated soils, the heavy metals get infiltrated into the plants. Although plants have developed various mechanisms to overcome heavy metal induced phyto-toxicity, yet their accumulation beyond the threshold concentrations lead to severe oxidative stress 1,2 . In plants, heavy metals affect the normal growth, development, reproduction, photosynthesis and accumulation of osmolytes, proteins, carbohydrates as well as polynucleotides 3,4 .…”

Section: Introductionmentioning

confidence: 99%