论文部分内容阅读
以2个常规杂交稻品种秋优桂99、秋优1025为对照,对2个耐旱杂交稻品种旱优3号、培杂桂旱1号进行盆栽试验,在孕穗期后停止水分供应,进行干旱胁迫,探讨干旱胁迫对不同水稻品种保护酶系、电导率的影响。试验结果表明,干旱胁迫下,不同水稻品种的超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)活性、丙二醛(M DA)含量和电导率随着干旱的发生、发展,均呈一致上升趋势,在后期更加明显;随着干旱胁迫程度的加剧,耐旱品种叶片中不同保护酶系均显著高于常规品种,而电导率却低于对照。说明耐旱水稻品种具有较强的酶促抗氧化能力和渗透调节能力,在干旱胁迫下较常规品种具有更强的适应能力。
Two conventional hybrid rice varieties Qianyougui 99 and Qiuyou 1025 were used as control. Two drought-tolerant hybrid rice cultivars, Haoyu 3 and Pei Guilian 1, were potted and the water supply was stopped after booting stage Drought Stress, to explore the effects of drought stress on the protective enzyme system and conductivity of different rice varieties. The results showed that under drought stress, the activities of superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), malondialdehyde (MDA) and conductivity of different rice cultivars The occurrence and development of drought showed a consistent upward trend, which was more obvious later. With the aggravation of drought stress, the different protective enzymes in drought-tolerant leaves were significantly higher than those in conventional varieties, while the conductivity was lower than the control. The results showed that drought-tolerant rice cultivars had strong antioxidant and osmotic adjustment ability, and had stronger adaptability than conventional varieties under drought stress.