抗坏血酸对高氮条件下高羊茅草坪草耐热性的影响

Effects of ascorbic acid on the heat tolerance of Festuca arundinacea under high nitrogen levels

本试验以冷季型草坪草高羊茅"猎狗5号"为材料,研究了抗坏血酸对高氮条件下草坪草耐热性的影响。结果表明,抗坏血酸处理显著提高了高羊茅的叶绿素、类胡萝卜素和可溶性蛋白质含量,提高了超氧化物歧化酶(SOD)、过氧化氢酶(CAT)和过氧化物酶(POD)活性,显著降低了脯氨酸和丙二醛(MDA)含量,进而增加了植株含水量、单蘖干重、绿叶比和单株分蘖数,增强高羊茅耐热性和延缓植株衰老,有利于其安全越夏。

The effects of AsA on the heat tolerance of Festuca arundinacea under high nitrogen levels were studied and showed that compared with high nitrogen only, treatment with AsA significantly increased the contents of chlorophyll, carotenoid and soluble protein content, the activity of SOD, CAT and POD, but decreased the proline and MDA contents. AsA treatment also increased the water content, dry weight, green leaf ratio and tillers. This increase in heat tolerance postponed the senescence of F. arundinacea plants, which helped F. arundinacea to oversummer safely .