MITIGATION OF WATERLOGGING-INDUCED DAMAGES TO PEPPER BY EXOGENOUS MeJA

文献类型: 外文期刊

第一作者: Liu Zhou-Bin

作者: Liu Zhou-Bin;Wei Ge;Yang Bo-Zhi;Zou Xue-Xia;Zou Chao-Hui;Zou Xue-Xia

作者机构:

关键词: MeJA;Pepper;Spraying period;Waterlogging stress

期刊名称:PAKISTAN JOURNAL OF BOTANY ( 影响因子:0.972; 五年影响因子:0.988 )

ISSN: 0556-3321

年卷期: 2017 年 49 卷 3 期

页码:

收录情况: SCI

摘要: In this study, we studied the mitigation effects of exogenous Methyl jasmonate (MeJA) on waterlogging-induced damages to Xinyou No.5 wrinkled skin pepper cultivar by spraying MeJA on leave's surface at different waterlogging periods and investigated its underlying mechanisms. The results showed that administration of MeJA increased antioxidant enzymes' activities, proline and soluble sugar contents and alcohol dehydrogenase (ADH) activity, reduced relative conductivity, malondialdehyde (MDA) and hydroxyl free radical (OH) accumulation, lactate dehydrogenase (LDH) activity and lactic acid and acetaldehyde accumulation, and maintained high root malate dehydrogenase (MDH) and succinate dehydrogenase (SDH) activities and certain aerobic respiratory metabolism. The study also found that there were significant differences among exogenous MeJA treatments at different waterlogging periods. Peppers treated with exogenous MeJA 1 day and 2 days prior to waterlogging had optimal agronomic traits, higher chlorophyll content, enzymatic activities and osmolytic substances, as well as lower relative conductivity, MDA and " OH accumulation. Overall, the results suggest that MeJA mitigates waterlogging-induced damages to pepper by adjusting osmolytic substances contents, antioxidant enzymatic activities and root respiration and metabolism and achieves better alleviation effects by spraying prior to waterlogging.

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