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Article

Exogenously-Sourced Ethylene Modulates Defense Mechanisms and Promotes Tolerance to Zinc Stress in Mustard (Brassica juncea L.)

1
Plant Systems Biology Laboratory, Department of Botany, School of Chemical and Life Sciences, Jamia Hamdard, New Delhi 110065, India
2
Plant Physiology and Biochemistry Laboratory, Department of Botany, Aligarh Muslim University, Aligarh 202002, India
3
Department of Pharmacognosy, King Saud University, Riyadh 11362, Kingdom of Saudi Arabia
*
Author to whom correspondence should be addressed.
Plants 2019, 8(12), 540; https://doi.org/10.3390/plants8120540
Received: 27 October 2019 / Revised: 17 November 2019 / Accepted: 20 November 2019 / Published: 25 November 2019
(This article belongs to the Special Issue Plant Responses and Tolerance to Metal/Metalloid Toxicity)
Heavy metal (HM) contamination of agricultural soil is primarily related to anthropogenic perturbations. Exposure to high concentration of HMs causes toxicity and undesirable effects in plants. In this study, the significance of ethylene was studied in response of mustard (Brassica juncea) to a high level (200 mg kg−1 soil) of zinc (Zn) exposure. Plants with high Zn showed inhibited photosynthesis and growth with the increase in oxidative stress. Application of ethylene (as ethephon) to Zn-grown plants restored photosynthesis and growth by inhibiting oxidative stress through increased antioxidant activity, the proline metabolism glyoxalase system, and nutrient homoeostasis. The results suggested that ethylene played a role in modulating defense mechanisms for tolerance of plants to Zn stress. View Full-Text
Keywords: antioxidant system; ethylene; glyoxalase system; photosynthesis; proline metabolism; zinc antioxidant system; ethylene; glyoxalase system; photosynthesis; proline metabolism; zinc
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MDPI and ACS Style

Khan, M.I.R.; Jahan, B.; Alajmi, M.F.; Rehman, M.T.; Khan, N.A. Exogenously-Sourced Ethylene Modulates Defense Mechanisms and Promotes Tolerance to Zinc Stress in Mustard (Brassica juncea L.). Plants 2019, 8, 540. https://doi.org/10.3390/plants8120540

AMA Style

Khan MIR, Jahan B, Alajmi MF, Rehman MT, Khan NA. Exogenously-Sourced Ethylene Modulates Defense Mechanisms and Promotes Tolerance to Zinc Stress in Mustard (Brassica juncea L.). Plants. 2019; 8(12):540. https://doi.org/10.3390/plants8120540

Chicago/Turabian Style

Khan, M. I.R., Badar Jahan, Mohamed F. Alajmi, Md T. Rehman, and Nafees A. Khan. 2019. "Exogenously-Sourced Ethylene Modulates Defense Mechanisms and Promotes Tolerance to Zinc Stress in Mustard (Brassica juncea L.)" Plants 8, no. 12: 540. https://doi.org/10.3390/plants8120540

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