高温胁迫对早稻根系质膜ATPase活性及NH(上标 + 下标 4)吸收的影响

Cultivars of early rice with heat resistance (Nongda 228 and 082) and those with heat sensitivity (Molizhan and Xeiqingzao B) were used to study the ATPase activity of plasma membrane and NH(superscript +subscript 4) absorption rate in roots under high temperature stress. The results indicated that under high temperature stress, H(superscript +)-ATPase and Ca(superscript 2+)-ATPase activities of plasma membrane were increased in roots of Nongda 228 and 082, while declined in roots of Molizhan and Xieqingzao B, with significant differences between them by Duncan's method test. The protein content in all cultivars declined under high temperature stress. The NH(superscript + subscript 4) absorption rate had no change in the cultivars with heat resistance, but declined in the cultivars with heat sensitivity under high temperature.