光呼吸与硝酸还原关系研究——光呼吸抑制剂与代谢物对黄化小麦硝酸还原酶光诱导的影响

 用黄化小麦为材料研究了多种光呼吸抑制剂与光呼吸代谢物对硝酸还原酶光诱导及叶片亚硝酸盐含量的影响。结果表明,光呼吸抑制剂NaHSO3、INH、HPMS与光呼吸代谢物乙醇酸、乙醛酸对硝酸还原酶光诱导有显著的抑制作用,而乙醇酸和乙醛酸处理可以提高叶片的亚硝酸盐含量,说明光呼吸与氮代谢有密切的关系,光呼吸的正常进行有利于硝态氮的还原。乙醇酸和乙醛酸对硝酸还原酶的抑制可能与亚硝酸盐在叶片中的积累有关。

Study on the Relationship Between Photorespiration and Nitrogen Metabolism

The effects of inhibitors and metabolisms of photorespiration on the light induction of nitrate reductase in the etiolated seedlings were investigated. The results showed that the inhibitors and metabolisms of photorespiration strongly inhibited the light induction of nitrate reductase, metabolisms of photorespiration increased the content of nitrite in the treated leaves. According to the above results,it was confirmed that there are close relationship between the nitrogen metabolism and photorespiration. The inhibition of photorespiration metabolism on the light induction of nitrate reductase may be due to the accumulation of nitrite in the leaves.