光照和不同氮素对水葫芦谷氨酰胺合成酶活性的影响  

Effect of Light and Different Forms of Nitrogen on the Activity of Glutamine Synthetase in Water Hyacinth(Echhornia crassipes)

作　　者：傅明辉[1] 陈肖丽[1] 严国花 

机构地区：[1]广东工业大学,轻工化工学院,广州510006

出　　处：《基因组学与应用生物学》2015年第3期635-639,共5页Genomics and Applied Biology

基　　金：国家自然科学基金(21177029)资助

摘　　要：谷氨酰胺合成酶(GS)是水葫芦氮代谢过程中一个关键酶,其活性受外界条件的影响。本研究探讨了光照和不同氮素对水葫芦根和叶GS活性的影响。研究发现,铵态氮和硝态氮抑制水葫芦根部GS活性,但却促进叶部GS活性。光照强度增加抑制根部GS活性,但对叶部GS活性影响不大。研究结果为揭示外来植物水葫芦快速入侵的机理,进一步开发和利用水葫芦进行水体修复提供理论基础。Glutamine synthetase(GS) plays a key role in nitrogen metabolism in water hyacinth(Echhornia crassipes). Its activity is influenced by environmental factors. This study investigated the effect of light intensity and different forms of nitrogen on the activity of GS in water hyacinth. It was found that ammonium and nitrate nitrogen inhibited the activity of GS in root, but promoted that of shoot. Light intensity could inhibit the activity of GS in root, but had no influence on that of shoot. The results can provide the theory foundation for explanation the mechanism of quick invasion from alien plants and further development and utilization of water hyacinth(Echhornia crassipes) in phytoremediation of polluted water.

关 键 词：水葫芦 谷氨酰胺合成酶 光照 氮素 

分 类 号：S45[农业科学—植物保护]