盐胁迫对二色补血草光合作用的影响  

EFFECT OF SALT STRESS ON THE PHOTOSYNTHESIS OF LIMONIUM BICOLOR

作　　者：周俊山[1] 史功伟[1] 张艳[1] 范海[1] 张圣强[1] 

机构地区：[1]山东师范大学生命科学学院,济南250014

出　　处：《山东师范大学学报（自然科学版）》2007年第1期125-127,共3页Journal of Shandong Normal University(Natural Science)

基　　金：国家重点基础研究发展规划项目(G1999011700);山东省中青年科学家基金项目

摘　　要：采用沙培法,用不同浓度的NaCl处理泌盐盐生植物二色补血草(Limonium bicolor Bge.Kuntz),两周后测定叶片光合速率、荧光参数等生理指标.结果表明:100mmol/L NaCl处理下,各指标与对照差异不大.但在200、400mmol/L NaCl处理下,与对照相比,Pn、Gs、Ci、CE、Fv/Fm、ΦPSⅡ下降,而Ls上升.这些数据表明,在较高浓度(200、400mmol/L NaCl)处理下,光合速率的降低是由气孔因素与非气孔因素共同作用的结果.Seedlings of typical salt - secretion halophyte Limonium bicolor Bge were treated with different concentrations of NaC1. The photosynthetic rate and other physiological indexes were measured two weeks later. The resuits showed no significant difference between 100 mmol/L NaCl and control, while the treatments with 200 and 400 mmol/L NaCl significantly re.duced Pn, Gs, Ci, CE, Fv/Fm, ΦPSⅡ and increased the level of Ls. These results showed that under higher concentration of NaCl（200 and 400 mmol/L）, the reduced photosynthetic rate was resulted from both stomatal limitation and non - stomatal limitation factors.

关 键 词：光合作用 叶绿素荧光 二色补血草 盐胁迫 

分 类 号：Q945.78[生物学—植物学]