NaCl处理对番茄幼苗光合作用和叶绿素荧光的影响  

Impact of NaCl treatment on photosynthesis and chlorophyll fluorescence of tomato seedlings

作　　者：高芸[1] 程智慧[1] 孟焕文[1] 

机构地区：[1]西北农林科技大学园艺学院,陕西杨凌712100

出　　处：《干旱地区农业研究》2008年第1期194-199,共6页Agricultural Research in the Arid Areas

基　　金：国家自然科学基金项目(30370977)

摘　　要：以6叶期幼苗为试材,通过水培试验研究了50,100,200,400 mg/L NaCl对番茄(Lycopersicon esculen-tumMill.)叶片光合色素含量、光合速率及叶绿素荧光参数的影响。结果表明:叶片光合色素含量随盐处理时间的延长而增加,气孔导度随盐浓度的增加而降低。各处理蒸腾速率在盐处理5 d后趋于稳定,但均低于对照,且盐浓度越大,蒸腾速率越低。盐处理初期(1 d),各处理的光合速率均低于对照,且盐浓度越大光合速率越低;盐处理3 d后光合速率开始恢复,并保持相对稳定;但处理11 d或13 d后又呈现下降趋势。NaCl处理期间,各处理的Fv/Fm值与Fv/Fo值和Fo与Fm分别有相似的变化趋势,在盐处理9 d后各处理趋向接近;qN值呈下降趋势,但随盐浓度的增加而增大。Impact of NaCl treatment on content of photosynthetic pigment, intensity of photosynthesis （Pn） and chlorophyll fluorescence parameters of tomato （cv. Zhongza No. 9） seedling at 6 - leaf stage were studied under hydroponic culture with 0, 50, 100, 200 or 400 mg/L of NaCl added, respectively. The results showed that the content of photosynthetic pigment was increased in the duration of salt treatment. Gs was decreased with the increase of salt concentration. After 5 - day salt treatment, although the higher salt treatment was found with lower Tr value and Tr value of all treatments was found lower than the control, they all tended to little difference. At the beginning （1 day） of salt treatment, Pn of all the treatments was lower than the control, and appeared lower with higher salt concentration. Pn was getting resuming after 3- day salt treatment and maintained a relative stable level until got dropping after 11 - or 13 - day treatment. The similar change trends were found between Fv/Frn and Fv/Fo, and between Fo and Fm during salt treatment, and each index among all the treatments was tend to close after 9 - day salt treatment, qN appeared a decreasing trend and increased with the increase of salinity concentration.

关 键 词：番茄 盐分 光合色素 光合速率 叶绿素荧光 

分 类 号：S641.2[农业科学—蔬菜学]