Full-Text Search:
Home|About CNKI|User Service|中文
Add to Favorite Get Latest Update

Changes in components of pigments and proteins in rice photosynthetic membrane during chilling stress

ZENG Nai yan 1,HE Jun xian 1,ZHAO Wen 1,LIANG Hou guo 2 (1.Department of Biology,Sichuan Union University,Chengdu 610064,China) (2.Department of Biology,Lanzhou University,Lanzhou 730000,China)  
A comparative study on changes in components of pigments and proteins in rice thylakoid membranes during 4℃ and 11℃ chilling stress was conducted.The results showed that low temperature at 4℃ not only decreased the contents of photosynthetic pigments (chlorophylls and carotenoids) but caused a profound variation in contents of the proteins in thylakoid membranes:most membrane proteins decreased progressively as the stress developed,and a new protein with a molecular mass of about 32.5 kD appeared on the third day of stress.Compared with 4℃,stress at 11℃ only caused decrease in contents of photosynthetic pigments,but had little effect on components and levels of thylakoid proteins.It was also found that treatments at both temperatures caused evident variation in the chl a/b ratio.The chl a/b ratio decreased at first during the early period of chilling stress (4℃,1 d and 11℃,2 d) but increased thereafter,suggesting that the reaction centres of the photosynthetic apparatus in plants are probably more sensitive to low temperature than the antenna components.
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©CNKI All Rights Reserved