Brassinosteroids Reciprocates Heavy Metals Induced Oxidative Stress in Radish by Regulating the Expression of Key Antioxidant Enzyme Genes

Sharma, Indu; Sharma, Ashutosh; Pati, Pratap Kumar; Bhardwaj, Renu

doi:10.1590/1678-4324-2018160679

Cited by 16 publications

(4 citation statements)

References 14 publications

(30 reference statements)

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“…BR pre-soaking treatment alleviated the peroxidative caused by Cd and chromium (Cr) in radish ( Raphanus sativus L. var. Pusa Chetki) [ 25 ]. Exogenous application of BR promoted the development of tomato ( Lycopersicon esculentum ) seedlings under Cd stress by improving the activities of photosynthetic system and antioxidant system [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

Brassinosteroids and gibberellic acid actively regulate the zinc detoxification mechanism of Medicago sativa L. seedlings

Ren

Liang

et al. 2023

BMC Plant Biol

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Background Zinc is one of the essential trace elements in plants. There are few studies on the phytohormone to rescue the toxicity of excessive zinc to plants. The aim of this research was to evaluate the alleviating effects of brassinosteroids (BR) and gibberellic acid (GA) on the toxicity of Medicago sativa L. (M. sativa) induced by excessive zinc. Results After zinc, BR and GA were applied to M. sativa seedlings for 7 weeks, their physiological and biochemical properties and gene expression patterns were evaluated. BR and GA significantly weakened the inhibition effect of zinc stress on growth and biomass of M. sativa. Under zinc stress, the zinc accumulation in M. sativa roots was over 5 times that in shoots. Application of BR and GA reduced zinc accumulation in roots. The content of lipid peroxides in M. sativa decreased and the activity of antioxidant enzymes increased under BR and GA treatments. In addition, BR and GA treatment down-regulated the transcription level of MsZIP1/3/5, the transporters of zinc uptake in root cells. And BR and GA up-regulated the expressions of zinc efflux, chelation, vacuolar storage and long-distance transport related genes: MsZIP7, MsHMA1, MsZIF1, MsMTP1, MsYSL1 and MsNAS1. Conclusions Our findings further showed that BR and GA application to M. sativa under zinc stress can reduce zinc accumulation, promote the response of the antioxidant defense system, and actively regulate the mechanism of heavy metal detoxification. Notably, 100 nM BR performed slightly better than 100 nM GA in all aspects of the detoxification of M. sativa by excessive zinc.

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Section: Introductionmentioning

confidence: 99%

Brassinosteroids and gibberellic acid actively regulate the zinc detoxification mechanism of Medicago sativa L. seedlings

Ren

Liang

et al. 2023

BMC Plant Biol

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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: 71%

“…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%

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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“…These documents potentially indicate that endogenous BR may also play a parallel role in plant growth induced by growth-related genes. Meanwhile, the biosynthesis of osmotic-adjustment substances and antioxidant enzymes depends on related genes, such as CAT-encoded genes and proline-biosynthesis gene ( LeP5CS ), which simultaneously respond to BR application (Sharma et al, 2018 ; Nie et al, 2019 ). Collectively, the functions of endogenous BR in mitigating Cd biotoxicity are multiple and complicated, and it has prosperous prospects in renewing Cd-polluted regions.…”

Section: Discussionmentioning

confidence: 99%

PscCYP716A1-Mediated Brassinolide Biosynthesis Increases Cadmium Tolerance and Enrichment in Poplar

et al. 2022

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Cadmium (Cd), as one of the heavy metals with biological poisonousness, seriously suppresses plant growth and does harm to human health. Hence, phytoremediation was proposed to mitigate the negative effects from Cd and restore contaminated soil. However, the internal mechanisms of detoxification of Cd used in phytoremediation are not completely revealed. In this study, we cloned the cytochrome P450 gene PscCYP716A1 from hybrid poplar “Chuanxiang No. 1” and found that the PscCYP716A1 was transcriptionally upregulated by Cd stress and downregulated by the exogenous brassinolide (BR). Meanwhile, PscCYP716A1 significantly promoted the poplar growth and enhanced the Cd accumulation in poplar. Compared to wild-type poplars, overexpressed PscCYP716A1 lines produced higher levels of endogenous BR and showed a stronger tolerance to Cd, which revealed that PscCYP716A1 may reduce the oxidative stress damage induced by Cd stress through accelerating BR synthesis. In general, PscCYP716A1 has a potential superiority in regulating the plant's tolerance to Cd stress, which will provide a scientific basis and a new type of gene-modified poplar for Cd-pollution remediation.

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Brassinosteroids Reciprocates Heavy Metals Induced Oxidative Stress in Radish by Regulating the Expression of Key Antioxidant Enzyme Genes

Cited by 16 publications

References 14 publications

Brassinosteroids and gibberellic acid actively regulate the zinc detoxification mechanism of Medicago sativa L. seedlings

Brassinosteroids and gibberellic acid actively regulate the zinc detoxification mechanism of Medicago sativa L. seedlings

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

PscCYP716A1-Mediated Brassinolide Biosynthesis Increases Cadmium Tolerance and Enrichment in Poplar

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