Jasmonic acid ameliorates alkaline stress by improving growth performance, ascorbate glutathione cycle and glyoxylase system in maize seedlings

被引:117
|
作者
Mir, Mudaser Ahmad [1 ]
John, Riffat [1 ]
Alyemeni, Mohammed Nasser [2 ]
Alam, Pravej [3 ]
Ahmad, Parvaiz [2 ,4 ]
机构
[1] Univ Kashmir, Dept Bot, Srinagar, Jammu & Kashmir, India
[2] King Saud Univ, Coll Sci, Bot & Microbiol Dept, POB 2460, Riyadh 11451, Saudi Arabia
[3] Prince Sattam bin Abdulaziz Univ, Coll Sci & Humanities, Dept Biol, Alkharj 11942, Saudi Arabia
[4] SP Coll, Dept Bot, Srinagar 190001, Jammu & Kashmir, India
来源
SCIENTIFIC REPORTS | 2018年 / 8卷
关键词
TOLERANCE; L; METHYLGLYOXAL; CHLOROPLASTS; REDUCTASE; STRATEGIES; INDUCTION; RESPONSES; TOXICITY; ENZYMES;
D O I
10.1038/s41598-018-21097-3
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Environmental pollution by alkaline salts, such as Na2CO3, is a permanent problem in agriculture. Here, we examined the putative role of jasmonic acid (JA) in improving Na2CO3-stress tolerance in maize seedlings. Pretreatment of maize seedlings with JA was found to significantly mitigate the toxic effects of excessive Na2CO3 on photosynthesis-and plant growth-related parameters. The JA-induced improved tolerance could be attributed to decreased Na uptake and Na2CO3-induced oxidative damage by lowering the accumulation of reactive oxygen species and malondialdehyde. JA counteracted the salt-induced increase in proline and glutathione content, and significantly improved ascorbic acid content and redox status. The major antioxidant enzyme activities were largely stimulated by JA pretreatment in maize plants exposed to excessive alkaline salts. Additionally, increased activities of glyoxalases I and II were correlated with reduced levels of methylglyoxal in JA-pretreated alkaline-stressed maize plants. These results indicated that modifying the endogenous Na+ and K+ contents by JA pretreatment improved alkaline tolerance in maize plants by inhibiting Na uptake and regulating the antioxidant and glyoxalase systems, thereby demonstrating the important role of JA in mitigating heavy metal toxicity. Our findings may be useful in the development of alkali stress tolerant crops by genetic engineering of JA biosynthesis.
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页数:13
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