《植物生理学报》 2012, 48(5): 499-504

吉林省47年育成的水稻品种根系伤流液重量变化及其与剑叶光合速率的关系

肖金川, 武志海, 徐克章*, 凌凤楼, 崔菁菁, 李鑫

吉林农业大学农学院, 长春130118

通信作者：徐克章；E-mail: kzx0708@yahoo.com.cn；Tel: 0431-84532893

摘　要：

为了解不同年代水稻品种根系活力的变化及其与叶片光合的关系, 以根系伤流液重量作为根系活力指标, 研究了吉 林省1958~2005年间育成的33个水稻品种抽穗后根系伤流液重量变化及其与剑叶净光合速率的关系。2年的研究结果表明,47年的遗传改良导致了水稻品种根系伤流液重量增加, 根系伤流液重量与品种的育成年份呈显著正相关, 与剑叶光合速率 也呈显著正相关。抽穗后根系伤流液重量可以作为剑叶光合能力和高产的参考指标。

关键词：水稻; 根系; 伤流液; 净光合速率

收稿：2012-01-16   修定：2012-02-13

资助：国家自然科学基金(31171478)和吉林省科技厅重点支持项 目(20080201)。

Changes of Root Bleeding Sap Weight and Its Correlation with Flag Leaf Net Photosynthetic Rate in Rice Cultivars Released 47 Years in Jilin Province of China

XIAO Jin-Chuan, WU Zhi-Hai, XU Ke-Zhang*, LING Feng-Lou, CUI Jing-Jing, LI Xin

College of Agronomy, Jilin Agricultural University, Changchun 130118, China

Corresponding author: XU Ke-Zhang; E-mail: kzx0708@yahoo.com.cn; Tel: 0431-84532893

Abstract:

In order to understand the changes of root activity and its correlation with leaf photosynthesis during the genetic improvement, root bleeding sap weight (BSW) was used as an index of root activity. Root BSW and leaf net photosynthetic rate (Pn) were measured after heading with 33 rice varieties bred in Jilin province during 1958-2005. The results with two years were showed: The genetic improvement of rice cultivars led to the increase of root BSW in 47 years, which showed a significant positive correlation level with year of release after heading. The correlation of BSW with flag Pn reached significant level. It suggested that root BSW after heading could be as an index of flag leaf Pn.

Key words: rice; root; bleeding sap; net photosynthetic rate (Pn)