24-epibrassinolide regulated diminution of Cr metal toxicity in Brassica juncea L. plants

Arora, Priya; Bhardwaj, Renu; Kanwar, Mukesh Kumar

doi:10.1590/s1677-04202010000300002

Cited by 23 publications

(10 citation statements)

References 36 publications

(35 reference statements)

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“…Therefore, it is possible that plant brassinosteroids have sufficient affinity with the rat gluco-corticoid receptor protein to be connected to their signaling chain through the recognition of molecules expressed by the constitutive CaMV promoter inserted in the transformation construct. Brassinosteroids have been shown to induce tolerance to a wide range of abiotic stresses (Kagale et al, 2007;Bajguz, 2011;Sittayat et al, 2007;Arora et al, 2010a;Koh et al, 2007) through the activation of anti-oxidative stress systems (Arora et al, 2010b), as well as the enhanced synthesis of abscisic acid (Yuan et al, 2010), ethylene, salicylic acid (Divi et al, 2010), polyamines and indole-3-acetic acid (Choudhary et al, 2010(Choudhary et al, , 2011. Responses to stress in plants, moreover, are known to be activated by increased levels of auxins, which in turn determines feedback interaction with flavonoid synthetic patterns (Peer and Murphy, 2007;Lewis et al, 2011) and crosstalk with brassinosteroid transcription process (see Depuydt and Hardtke (2011) for an extensive review).…”

Section: Discussionmentioning

confidence: 99%

Response to metal stress of Nicotiana langsdorffii plants wild-type and transgenic for the rat glucocorticoid receptor gene

Fuoco

Bogani

Capodaglio

et al. 2013

Journal of Plant Physiology

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a b s t r a c tRecently our findings have shown that the integration of the gene coding for the rat gluco-corticoid receptor (GR receptor) in Nicotiana langsdorffii plants induced morphophysiological effects in transgenic plants through the modification of their hormonal pattern. Phytohormones play a key role in plant responses to many different biotic and abiotic stresses since a modified hormonal profile up-regulates the activation of secondary metabolites involved in the response to stress. In this work transgenic GR plants and isogenic wild type genotypes were exposed to metal stress by treating them with 30 ppm cadmium(II) or 50 ppm chromium(VI). Hormonal patterns along with changes in key response related metabolites were then monitored and compared. Heavy metal up-take was found to be lower in the GR plants. The transgenic plants exhibited higher values of S-abscisic acid (S-ABA) and 3-indole acetic acid (IAA), salicylic acid and total polyphenols, chlorogenic acid and antiradical activity, compared to the untransformed wild type plants. Both Cd and Cr treatments led to an increase in hormone concentrations and secondary metabolites only in wild type plants. Analysis of the results suggests that the stress responses due to changes in the plant's hormonal system may derive from the interaction between the GR receptor and phytosteroids, which are known to play a key role in plant physiology and development.

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Section: Discussionmentioning

confidence: 99%

Response to metal stress of Nicotiana langsdorffii plants wild-type and transgenic for the rat glucocorticoid receptor gene

Fuoco

Bogani

Capodaglio

et al. 2013

Journal of Plant Physiology

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“…Seed pre-soaking treatment of 28-homoBL at 10 (−7) M was effective in ameliorating Cr(VI) stress in Raphanus sativus L. (Pusa Chetaki), where an increased activity of antioxidative enzymes (except GPX) and the contents of proline and proteins but reduced lipid peroxidation were evidenced (Sharma et al, 2011b). 24-EpiBL-mediated diminution of Cr-toxicity in Brassica juncea was reported, where increased activity of GPX, CAT, GR, APX, SOD, MDHAR, and DHAR was argued to improve plant health (Arora et al, 2010b). Amelioration of Al-impacts was evidenced through epiBL or homoBL spraying to mung bean (Vigna radiata), where these BRs increased RLWC, water use efficiency, photosynthetic rate via enhancing the activity of antioxidative enzymes such as CAT, POD, and SOD in leaves (Ali et al, 2008b).…”

Section: Metal/metalloid Stressmentioning

confidence: 99%

Brassinosteroids make plant life easier under abiotic stresses mainly by modulating major components of antioxidant defense system

Vardhini

Anjum

2015

Front. Environ. Sci.

181

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Various abiotic stress factors significantly contribute to major worldwide-losses in crop productivity by mainly impacting plant's stress tolerance/adaptive capacity. The latter is largely governed by the efficiency of antioxidant defense system for the metabolism of elevated reactive oxygen species (ROS), caused by different abiotic stresses. Plant antioxidant defense system includes both enzymatic (such as superoxide dismutase,

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“…Earlier, had reported the effect of EBL treatment to regulate the diminution of Cr metal toxicity in mustard plants [69].…”

Section: Responses To Other Heavy Metal Stressesmentioning

confidence: 99%

Brassinosteroids and Plant Responses to Heavy Metal Stress. An Overview

Vázquez¹,

Guerrero²,

González³

et al. 2013

OJMetal

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Soil contamination with heavy metals has become a worldwide problem, leading to the loss in agricultural productivity. Plants have a remarkable ability to take up and accumulate heavy metals from their external environment and it is well known that high levels of heavy metals affect different physiological and metabolic processes. Brassinosteroids are considered as the sixth class of plant hormones and they are essential for plant growth and development. These compounds are able of inducing abiotic stress tolerance in plants. In this paper, information about brassinosteroids and plant responses to heavy metal stress is reviewed.

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24-epibrassinolide regulated diminution of Cr metal toxicity in Brassica juncea L. plants

Abstract: The present work was undertaken to study the effects of 24-epibrassinolide (0, 10 -10

Cited by 23 publications

References 36 publications

Response to metal stress of Nicotiana langsdorffii plants wild-type and transgenic for the rat glucocorticoid receptor gene

Response to metal stress of Nicotiana langsdorffii plants wild-type and transgenic for the rat glucocorticoid receptor gene

Brassinosteroids make plant life easier under abiotic stresses mainly by modulating major components of antioxidant defense system

Brassinosteroids and Plant Responses to Heavy Metal Stress. An Overview

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