采用光呼吸抑制剂NaHSO_3对水稻、小麦的处理,获得如下结果: (1)一定浓度的NaHSO_3处理叶片有提高净光合的效果,在100—300ppm范围内净光合可提高5—20％左右。 (2)用低氧(2％O_2)控制可证明,净光合提高是由于光呼吸被抑制的结果,同时乙醇酸氧化酶活性降低与乙醇酸含量的积累同光呼吸有关的各项参数表现一致。 (3)在排除个体差异和其他条件干扰下,从未发现被处理的叶片的净光合有低于对照者,说明抑制光呼吸对正常光合并未产生不利地影响,再者从施用光呼吸抑制剂有提高经济产量的趋势,问接证明抑制光呼吸并未妨碍生理过程的正常进行。 (4)由于NaHSO_3是一种廉价的普通试剂,又易于被叶片吸收运转,因此作为一种提高光合效率的手段,至少作短期内施用,是很值得注意的。诚然,由于光呼吸的生理意义尚未澄清,上述观点仍须继续研究证明。 The treatment of rice and wheat with NaHSO_3, a photorespiratory inhibitor, showed the following results: (1) NaHSO_3 treatment increased the net photosynthesis of leaves at a certain concentration, and net photosynthesis increased by 5-20% in the range of 100-300ppm. (2) The control of hypoxia (2% O 2) showed that the increase of net photosynthesis was attributed to the inhibition of photorespiration, while the decrease of glycolate oxidase activity was in agreement with that of glycolate accumulation . (3) Under the interference of individual differences and other conditions, the net photosynthesis of the treated leaves was never found to be lower than that of the control, indicating that inhibition of photorespiration did not adversely affect normal photosynthesis, and from the application of photorespiration inhibition Agents have the tendency to increase economic output, asked to prove that inhibition of photorespiration did not prevent the normal physiological processes. (4) Since NaHSO 3 is an inexpensive common reagent easily absorbed by the leaves, it is worth noting that as a means of increasing photosynthetic efficiency, at least for a short period of time, it is worth noticing. It is true that, as the physiological significance of photorespiration has not yet been clarified, the above point of view still needs further study.