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

被引：38
作者：
Khan, M. Iqbal R. [1 ]
Jahan, Badar [2 ]
Alajmi, Mohamed F. [3 ]
Rehman, Md Tabish [3 ]
Khan, Nafees A. [2 ]
机构：
[1] Jamia Hamdard, Sch Chem & Life Sci, Dept Bot, Plant Syst Biol Lab, New Delhi 110065, India
[2] Aligarh Muslim Univ, Dept Bot, Plant Physiol & Biochem Lab, Aligarh 202002, Uttar Pradesh, India
[3] King Saud Univ, Dept Pharmacognosy, Riyadh 11362, Saudi Arabia
来源：
PLANTS-BASEL | 2019年 / 8卷 / 12期
基金：
美国国家卫生研究院;
关键词：
antioxidant system; ethylene; glyoxalase system; photosynthesis; proline metabolism; zinc; ANTIOXIDANT ENZYME RESPONSES; INDUCED PROLINE ACCUMULATION; SULFUR ASSIMILATION; METHYLGLYOXAL DETOXIFICATION; GLUTATHIONE-REDUCTASE; SUPEROXIDE-DISMUTASE; INCREASED NITROGEN; HYDROGEN-PEROXIDE; OXIDATIVE DAMAGE; SALINITY STRESS;
D O I：
10.3390/plants8120540
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
摘要：
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.
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页数：18
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