氮营养对干旱逆境下水稻体内可溶性渗透调节物质的影响  

Effects of nitrogen nutrition on soluble osmotica in rice plants in response to drought stress

作　　者：朱维琴[1] 吴良欢[1] 陶勤南[1] 

机构地区：[1]浙江大学资源科学系

出　　处：《浙江大学学报（农业与生命科学版）》2003年第5期479-484,共6页Journal of Zhejiang University:Agriculture and Life Sciences

基　　金：国家重点基础研究发展规划项目(G1999011707);国家自然科学基金项目(39970146);浙江省科技厅重点资助项目(011102187).

摘　　要：采用聚乙二醇(PEG6000)模拟水稻短期干旱胁迫研究表明,适度氮素营养有利于旱稻品种“巴西陆稻”叶片中游离脯氨酸(Pro)和游离氨基酸总量(TFA)的积累,对常规水稻品种“中香1号”效应不明显,但是施氮均使两品种水稻叶片中可溶性糖(SS)含量下降.干旱逆境下水稻无机渗透调节物质以K+为主,且氮营养可促进水稻茎叶K+的积累.The effect of nitrogen nutrition on soluble osmotica in rice plants grown under polyethylene glycol(PEG)-induced drought stress was studied. The results showed that moderate nitrogen nutrition could promote the accumulation of free proline and total free amino acid in leaves of Brazilian upland rice which belongs to drought resistant varieties, although it had no significant effect on conventional rice variety Zhongxiang 1. Adequate nitrogen supply led to decrease in soluble sugar content of leaves in both varieties. As changes of inorganic osmotica content in rice plants stressed by drought was concerned, potassium ion was the main osmoticum, moreover, moderate nitrogen nutrition could promote the accumulation of potassium ion in both rice shoots.

关 键 词：氮营养 干旱胁迫 水稻 可溶性渗透调节物质 作用机理 

分 类 号：S511[农业科学—作物学] Q945.78[生物学—植物学]