华北农学报2017，Vol.32Issue(2)：164-170,7.DOI:10.7668/hbnxb.2017.02.025
桑树幼苗叶片PSⅡ功能对不同氮素形态的响应
Responses of PS Ⅱ Function in Leaves of Morus alba Seedlings to Nitrogen Form
摘要
Abstract
In order to determine the photosynthetic capacity and requirement of mulberry for different nitrogen forms,one year old of mulberry seedlings as experimental materials,the chlorophyll fluorescence characteristics of mulberry leaves was studied under three nitrogen forms,in which nitrogen concentration was 7.5 mmol/L with nitrate nitrogen(NO-3-N),ammonium nitrogen(NH+4-N)and ammonium nitrate(NH4NO3).The results showed that the photochemical activity,electron transfer rate and light energy utilization of mulberry leaves in PSⅡ under NH+4-N were significantly lower than that of NH4NO3 and NO-3-N,while there was no significant differences between NH4NO3 and NO-3-N.The VJ and VI of mulberry leaves were significantly increased by NH+4-N treatment,that was,QA to QB electronic transmission rate of PSⅡ electronic receptor side were lower.while,the Sm and N were significantly higher than those of NH4NO3 and NO-3-N,which showed that the lower the electron transfer ability of PSⅡcould be related with capacity of receptor side of QB treated by NH+4-N.In addition,VK and VL of mulberry leaf under NH+4-N treatment was also lower than that of NO-3-N and NH4NO3,which suggested that the suppressed OEC activity and decreased thylakoid membrane structure stability were the important reasons for reducing photochemical activity in the leaves of PSⅡ reaction centers under the NH+4-N treatment.关键词
桑树/氮形态/叶绿素荧光/PSⅡKey words
Mulberry/Nitrogen form/Chlorophyll fluorescence characteristics/PSⅡ分类
农业科技引用本文复制引用
谷思玉,杨艳,蔡越桐,郭兴军,于雪薇,朱玉伟,张一鹤,李悦,张会慧..桑树幼苗叶片PSⅡ功能对不同氮素形态的响应[J].华北农学报,2017,32(2):164-170,7.基金项目
黑龙江省自然科学基金项目(C200917) （C200917）
