不同氮素水平对菜用甘薯活性氧代谢的影响  

Effects of different nitrogen levels on active oxygen metabolism of vegetable sweet potato

作　　者：任丽花[1,2] 余华[1,2] 黄敏敏[1,2] 罗土炎[1,2] 蔡南通[3] 邱永祥[3] 

机构地区：[1]福建省农业科学院中心实验室,350003 [2]福建省精密仪器农业测试重点实验室 [3]福建省农业科学院作物研究所

出　　处：《福建农业科技》2011年第2期105-107,共3页Fujian Agricultural Science and Technology

基　　金：福建省青年人才项目(2008F3022);国家甘薯产业技术体系(nycytx-16-B-12)

摘　　要：以福薯7-6为材料研究不同氮肥用量对菜用甘薯叶片活性氧代谢的影响。试验结果表明,氮不足或氮过量的情况下,福薯7-6叶片由于SOD活性下降,而且POD活性的提高不能及时清除SOD催化产生的H2O2,O.2-的积累提高了生物膜的过氧化作用,导致质膜相对透性增加,离子大量外渗,相对电导率增加,这些均导致叶片细胞受到伤害。The active oxygen metabolism of vegetable sweet potato under different nitrogen levels were studied. The results showed that, under both nitrogen insufficient and excessive conditions, the leaves of ＂Fushu7 -6＂ couldn＇t remove H202 timely owing to the decrease of SOD activity and increase of POD activity. At the same time the accumulation of O 2^- aggravated peroxidation of biomembrane, leading to the increase of membrane permeability and extravasation of ion and increase of relative conductivity. These unheahh metabolisms caused the harm of cells.

关 键 词：氮 菜用甘薯 活性氧代谢 

分 类 号：S531[农业科学—作物学]