根际pH值对杂交稻幼苗光能转化特性的影响  

Effect of pH in Rhizosphere on the Characteristic of Light Energy Transformation in Hybrid Rice Seedlings

作　　者：刘少华[1] 陈国祥[1] 吕川根[2] 杨艳华[1] 邵志广[3] 王娜[1] 

机构地区：[1]南京师范大学生命科学学院,江苏南京210097 [2]江苏省农业科学院粮食作物研究所,江苏南京210014 [3]江苏省丹阳师范学校,江苏丹阳212300

出　　处：《中国水稻科学》2003年第3期244-248,共5页Chinese Journal of Rice Science

基　　金：国家自然科学基金资助项目 (30 2 70 792 ) ;江苏省高校自然科学研究计划项目 (0 2KJB180 0 0 6 )

摘　　要：模拟土壤pH值对杂交稻两优培九幼苗叶片光合速率、类囊体膜的光合电子传递活性、室温吸收光谱、室温荧光发射光谱以及多肽组分影响的研究结果表明 ,当土壤pH值小于 5 .0或大于 7.0时 ,叶片光合速率、PSⅠ和PSⅡ的电子传递活性以及类囊体膜室温荧光发射峰值均有不同程度的降低 ,其中尤以pH 4.0试验组的降低幅度最为显著 ;pH 4.0与pH8.0两个试验组使类囊体膜的室温吸收光谱峰值得到增强 ,但未使多肽组分发生明显改变。研究证明 ,与酸性环境相比 ,水稻幼苗对碱性环境的耐受能力更强 ,其生长的最适土壤pH值为 6 .0。Effect of pH on photosynthetic rate of leaf, electron transfer activity of photosystem, absorption spectrum,fluorescence emission spectrum at room temperature, and polypeptide compositions of rice seedlings thylakiod membrane were observed. Results showed that under pH 4.0 and pH 8.0, the electron transfer activity of PSⅠand PSⅡ were inhibited and the inhibition to PSⅡwas stronger than that to PSⅠ. The fluorescence emission spectrum of thylakiod membrane was reduced, whereas the absorption spectrum was strengthened at room temperature. The polypeptide compositions were not changed. pH 6.0 is the fittest to rice seedlings growth.

关 键 词：根际PH值 杂交稻 幼苗 光能转化特性 光合特性 类囊体膜 

分 类 号：S511[农业科学—作物学]