【摘要】 不抗冷水稻（"秋光"和"早锦"）幼芽经低温（4℃、48小时）处理后线粒体的超微结构有明显变化,呼吸控制、氧化磷酸化效率都有明显改变,抗氰氧化途径基本失活,而抗冷水稻("吉梗₄₄"和"吉梗₆₀")经同样低温处理后都没有发生明显的变化。不抗冷水稻幼芽线粒体的琥珀酸氧化活性Arrhenius图在18℃有一折点,而抗冷水稻线粒体琥珀酸氧化活性Arrhenius图在5—30℃范围内呈线性关系。更多还原

【Abstract】 After low temperature (4℃ 48 h) treatment oxidative phosphorylation efficiency (ADP/O) and respiratory control ratio (RCE) of mitochondria isolated from chillingsensitive rice (Qiu Guang,Zao Jin) shoots were lowered and ultrastructure of mitochondria in the rice shoots were obviously changed,but no similar changes were observed in the mitochondria from chilling-tolerant rice (Jin Geng 44,Jin Geng 60) shoots after chilling treatment.A "break" at 18℃ had been observed in the Arrhenius plot for succinic oxidase activity by seedling mitochondria of chilling-sensitive rice,while that of mitochondria from chilling-telerant rice shoots exhibited a continuous linear function with temperatures between 5—30℃.更多还原