华南农业大学学报Issue(2)：6-12,7.
不同供氮水平下盐胁迫对水稻光合特性和某些生理特性的影响
Effects of salt stress on photosynthetic characteristics and some physiological traits of rice varieties at different nitrogen levels
摘要
Abstract
Objective]To understand the response to salt stress on rice varieties cultured at different nitro-gen levels.[Method]Two north japonica rice varieties were cultured at five nitrogen levels of nutrient so-lution until booting stage , the changes of biomass , photosynthetic characteristics and some physiological characteristics of two rice varieties were measured in three salt concentrations .[Result and conclusion]The biomass of rice varieties which were cultured at different nitrogen levels of nutrient solution decreased under salt stress;there were significant decrease in net photosynthetic rate ( Pn) , stomatal conductance (Gs), transpiration rate ( Tr) and apparent mesophyll conductance ( AMC) of rice leaves under salt stress.The Pn reduction was due to non-stomatal restriction factors in low-nitrogen-level nutrient solu-tion, however, the stomatal and non-stomatal limitation factors resulted in the Pn reduction in high-nitro-gen-level nutrient solution .Under salt stress , the activity of antioxidant enzymes such as SOD , POD and CAT, the contents of proline and soluble sugar of leaves in 1/2N-level nutrient solution were significantly higher than those at other nitrogen-levels, the membrane permeability and the content of MDA in 1/2N-level were lower than those at other nitrogen-levels.The results show that rice varieties cultured in 1/2N-level nutrient solution can improve the capacity of osmotic regulation , enhancing the salt-tolerance ability of rice varieties at booting stage .The capacity of salt-tolerance of Jiudao 13 is higher than that of Jijing 88 .关键词
水稻/盐胁迫/氮肥/光合作用/抗氧化酶活性Key words
rice/salt stress/nitrogen fertilizer/photosynthesis/antioxidant enzyme activity分类
农业科技引用本文复制引用
刘晓龙,徐晨,徐克章,崔菁菁,张治安,凌凤楼,安久海,武志海..不同供氮水平下盐胁迫对水稻光合特性和某些生理特性的影响[J].华南农业大学学报,2015,(2):6-12,7.基金项目
国家自然科学基金（31171478）；吉林省自然科学基金（201215183）；吉林省科技厅重点资助项目（20080201）；吉林省教育厅重点项目 （）
