【摘要】 [目的]以枇杷2年生实生苗为研究材料,对其进行良好水分处理(100%田间持水量)、中度干旱处理(70%田间持水量)和重度干旱处理(50%田间持水量),比较枇杷幼苗的抗氧化酶活性及可溶性渗透调节物质等生理生化特性对不同程度土壤干旱的响应。[结果]干旱处理尤其是50%田间持水量使得植株叶片膜质过氧化产物MDA含量在0.05水平显著增加,同时增加脯氨酸含量、抗氧化酶活性。[结论]枇杷可以通过激活抗氧化酶系统及累积渗透调节物质等生理特性来积极应对干旱。更多还原

【Abstract】 [Objective]The two-years old seedlings of Eriobotrya japonica were used as experiment materials, the physiological metabolism of seedlings including antioxidative enzyme activities and osmotic adjustment substances were investigated under three treatments, such as well-watered 100% field capacity (FC), moderate soil drought stress (70%FC), severe soil drought stress (50%FC). [Result] MDA were significantly increased under the two drought conditions. At the same time, the antioxidative enzyme activities and osmotic adjustment substances were increased by drought stress, especially by severe drought. [Conclusion] Eriobotrya japonica was drought-resistant by adjusting its physiological metabolism, including the improvement of antioxidative enzyme activities and accumulation of osmotic adjustment substances when exposed to drought.更多还原