钙对模拟酸雨胁迫下春小麦光合作用及相关生理生化特性的影响。
The role of calcium in improving photosynthesis and related physiological and biochemical attributes of spring wheat subjected to simulated acid rain.
机构信息
Agronomy Department, Faculty of Agriculture, Tarbiat Modares University, Jallal-Al-Ahmad Highway, Nasr Bridge, Tehran, Iran Zip code: 1411713116 P.O. Box: 14115-336.
Agronomy and Plant Breeding Department, Faculty of Agriculture, University of Kurdistan, Sanandaj, Iran.
出版信息
Physiol Mol Biol Plants. 2013 Apr;19(2):189-98. doi: 10.1007/s12298-013-0165-7.
The response of photosynthesis parameters, catalase, superoxide dismutase and peroxidase activity, malondialdehyde, proline, chlorophyll, yield and yield components to foliar application of calcium and simulated acid rain in wheat were investigated. Foliar treatment of calcium led to significant increases in the photosynthesis rate, transpiration rate, stomatal conductance, proline, chlorophyll, yield and yield components in plants subjected to acid rain. Antioxidant enzyme activity and lipid peroxidation in the wheat leaves decreased because of calcium foliar application. Calcium hindered degradation of the rubisco subunits under acid rain treatment compared with water-treated plants. Results suggest that acid rain induces the production of free radicals resulting in lipid peroxidation of the cell membrane so that significant increase in antioxidant enzyme activity was observed. In addition, photosynthetic parameters i.e. photosynthesis rate, transpiration rate and stomatal conductance were drastically suppressed by acid rain. The cellular damage caused by free radicals might be reduced or prevented by a protective metabolism including antioxidative enzymes and calcium. We report that foliar application of calcium before acid rain may ameliorate the adverse effects of acid rain in wheat plants.
研究了叶面喷施钙和模拟酸雨对小麦光合作用参数、过氧化氢酶、超氧化物歧化酶和过氧化物酶活性、丙二醛、脯氨酸、叶绿素、产量和产量构成的影响。叶面喷施钙可显著提高酸雨胁迫下小麦的光合作用速率、蒸腾速率、气孔导度、脯氨酸、叶绿素、产量和产量构成。叶面喷施钙可降低小麦叶片中抗氧化酶活性和脂质过氧化。与水培植物相比，钙处理抑制了酸雨处理下 rubisco 亚基的降解。结果表明，酸雨诱导自由基的产生，导致细胞膜脂质过氧化，因此观察到抗氧化酶活性显著增加。此外，酸雨严重抑制了光合作用参数，如光合作用速率、蒸腾速率和气孔导度。自由基引起的细胞损伤可能通过包括抗氧化酶和钙在内的保护代谢来减少或预防。我们报告说，在酸雨前叶面喷施钙可以减轻酸雨对小麦的不利影响。
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