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首页> 外文期刊>Turkish Journal of Botany >Impact of Soil Drought Stress on Photochemical Efficiency of Photosystem II and Antioxidant Enzyme Activities of Phaseolus Vulgaris Cultivars
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Impact of Soil Drought Stress on Photochemical Efficiency of Photosystem II and Antioxidant Enzyme Activities of Phaseolus Vulgaris Cultivars

机译：土壤干旱胁迫对菜豆光合系统II光化学效率和抗氧化酶活性的影响

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摘要

Common bean (Phaseolus vulgaris L.) cultivars (cvs) (G?ynük 98, Karacasehir 90, Sehirali 90, ES 855, and Yunus 90) were subjected to drought stress in order to assess the levels of drought tolerance through the analysis of growth parameters, leaf water potential (yleaf), stomatal conductance (gs), chlorophyll (chl) content, and lipid peroxidation. Significant differences were recorded among cultivars in most traits. Yunus 90 was identified as the most tolerant, and Karacasehir 90 was the most sensitive. Furthermore, the changes in antioxidant enzyme activities, H2O2 content, and Photosystem II were investigated under drought stress, where Antioxidant enzyme activities increased while H2O2 contents decreased. In Yunus 90, increases in catalase (CAT) and ascorbate peroxidase (APX) activities were higher than those of the other cvs. Increase in GPX activity was higher in Karacasehir 90 compared to Yunus 90. Drought stress reduced quantum yield of PS II photochemistry (fPSII) and photochemical quenching (qP) in all cultivars. The reduction was more pronounced in Karacasehir 90. These results showed that different common bean cvs had different photochemical efficiencies and used different antioxidant enzymes in order to scavenge reactive oxygen species.
机译：对普通豆（菜豆）（Gvynük98，Karacasehir 90，Sehirali 90，ES 855和尤努斯90）进行干旱胁迫，以便通过生长分析来评估其耐旱水平参数，叶水势（叶面），气孔导度（gs），叶绿素（chl）含量和脂质过氧化作用。在大多数性状的品种之间记录到显着差异。尤努斯90被认为是最能容忍的，而卡拉谢希尔90则最敏感。此外，研究了干旱胁迫下抗氧化酶活性，H2O2含量和Photosystem II的变化，其中抗氧化酶活性增加而H2O2含量减少。在Yunus 90中，过氧化氢酶（CAT）和抗坏血酸过氧化物酶（APX）活性的增加高于其他cvs。与尤努斯90相比，卡拉维谢尔90中GPX活性的增加更高。干旱胁迫降低了所有品种PS II光化学（fPSII）和光化学猝灭（qP）的量子产率。在Karacasehir 90中，还原作用更为明显。这些结果表明，不同的普通豆类cvs具有不同的光化学效率，并且使用不同的抗氧化剂来清除活性氧。

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