Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Journal of Northwest A & F University(Natural Science Edition)》 2012-05
Add to Favorite Get Latest Update

Changes in nitrate reductase activity of rice cultivars with different released years in Jilin province

CUI Jing-jinga,b,DI Yu-tingb,XU Ke-zhangb, ZHANG Zhi-anb,XIAO Jin-chuanb,LI Xinc(a College of Horticulture,b College of Agronomy,c College of Chinese Medicinal Materials, Jilin Agricultural University,Changchun,Jilin 130118,China)  
【Objective】 The study was conducted to understand the changes in nitrate reductase activity(NRA) and its relationship between yield and photosynthesis of rice varieties bred in different times,and to provide a theoretical basis for high-yield rice breeding and cultivation of Jilin province.【Method】 In this study,the samples of 18 rice varieties bred and extended for production in Jilin province from 1958 to 2005 were used to detect the levels of rice flag leaf NRA and its relationship with flag leaf net photosynthetic rate(Pn) and yield relation.【Result】 Rice leaf NRA was lower in booting stage,and highest in heading stage,then showed a decrease trend;NRA decreased in the course of the breeding years.The net Pn of different rice varieties was highest in heading stage,and then decreased;the net Pn increased in the course of the breeding year.NRA was negatively correlated with the net Pn(P0.05) and the rice yield(P0.05).【Conclusion】 Genetic improvement of rice varieties improved the photosynthesis and yield of the leaves,but NRA decreased in the course of the breeding year,which may lead to the decrease of rice nitrogen use efficiency.
【Fund】: 国家自然科学基金项目(31171478);; 吉林省科技厅重点支持项目(20080201)
【CateGory Index】: S511
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved