氮素用量对春玉米穗位叶蔗糖合成关键酶活性的影响

Effect of Nitrogen Application on Activities of Key Enzymes of Sucrose Synthesis in the Leaf Located Near the Ear of Spring Maize

试验以高淀粉玉米四单19、普通玉米东农250、优质蛋白玉米丰禾10为材料,研究氮素用量对春玉米穗位叶蔗糖代谢的影响,揭示蔗糖合成过程中蔗糖合成酶(SS)和蔗糖磷酸合成酶(SPS)的调节作用。结果表明:氮素用量适当有利于提高玉米穗位叶蔗糖含量、蔗糖合成酶活性和蔗糖磷酸合成酶活性,证实了蔗糖合成酶和蔗糖磷酸合成酶能促进春玉米叶片蔗糖积累。

This experiment utilized high starch maize Sidanl9, common maize Dongnong 250, good quality protein maize Fenghe 10 as material, studied on the effect of nitrogen application on the sucrose metabolizing in the leaf located near the ear of spring maize. The research indicated that SS and SPS had controlled sucrose content in process of sucrose synthesis. The results showed that proper rate of nitrogen application could increase the content of sucrose and the activities of SS and SPS in the leaf located near the ear, the SS and SPS could increase the accumulation of sucrose in the leaf located near the ear of spring maize.