Eco-physhilogical basis of the alternative respiration in crops

通过建立基于O187判别法的交替呼吸途径反应速率测定系统，结合交替氧化酶基因表达，研究了交替呼吸途径在作物生产中的作用，结果表明，交替呼吸途径的反应速率随生育期的延长而增加，在作物生长后期对作物生产具有重要作用。虽然替代途径对作物灌浆期碳经济的贡献并不局限于生长活跃的幼龄生长期，但它对作物灌浆期碳经济的贡献是显著的。阐明了交替氧化酶（AOX）基因表达的调控机制。通过对AOX蛋白质合成的比较.为了了解替代途径在作物生产中的重要作用，必须对AOX的O18判别法和基因表达进行仔细的检测。

The role of alteranative respiration pathway in crop production was studies by establishing the system to measure the reaction rate based on the O187 discrimination method as well as the gene expression of alternative oxidase.The reaction rate of alternative pathway increased with growth stage indicating the significant role in crop production toward the end of growth. The significant contribution of alternative pathway on carbon economy during grain filling period in grain crops was suggeted although it is not limiting to the growth in the actively growing younger growth stages. The regulation mechanism of alternative oxidase (AOX) gene expression was elucidated. Through the compariso and protein synthesis of AOX. To know the critical role of alternative pathway on crop production, the careful examination based on O18 discrimination methd and gene expression of AOX is indispensable.