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中国农学通报

中国农学通报 ›› 2009, Vol. 25 ›› Issue (10): 143-147.

所属专题： 生物技术； 园艺

• 农学 农业基础科学 • 上一篇    下一篇

光皮树不同无性系开花期光合生理特性日变化规律研究

宋庆安,,,李志辉,李昌珠,   

  • 收稿日期:2009-02-12 修回日期:2009-03-23 出版日期:2009-05-20 发布日期:2009-05-20

Study on diurnal variation of photosynthetic physiological characteristics of Cornus wilsoniana clones during the flowering stage

Song Qing’an,,, Li Zhihui, Li Changzhu,   

  • Received:2009-02-12 Revised:2009-03-23 Online:2009-05-20 Published:2009-05-20

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摘要： 为研究光皮树不同无性系光合特性的日变化规律，利用LI－6400光合测定系统对开花期的不同光皮树无性系的光合生理特性日变化进行了研究。结果表明：(1)G-2、G-3、G-8、G-9的Pn日变化为“双峰”曲线，G-5、G-6、G-7、G-10、G-11、G-13、G-14、G-15的Pn日变化为“单峰”曲线。12个无性系的Pn日均值可分为3类，第一类为G-6、G-7、G-8，日平均光合速率值最高，第二类为G-2、G-3、G-9、G-10、G-11、G-13、G-14、G-15，日平均光合速率中等，第三类为G-5，日平均光合速率最低。(2) G-5、G-14、G-15为低耗水型无性系，G-13为中等耗水型无性系，G-2、G-3、G-6、G-7、G-8、G-9、G-10、G-11为高耗水型无性系。(3) G-8、G-14、G-15为高水分利用效率型，G-6、G-7、G-11、G-13为中等水分利用效率型，G-2、G-3、G-5、G-9、G-10为低水分利用效率型。水分利用效率具有一定的波动性，G-5、G-6、G-7、G-8、G-15为波动型无性系；G-9、G-10、G-11、G-13、G-14为稳定型无性系；G-2、G-3为超稳定型无性系。

Abstract: In order to explore the diurnal variation of photosynthetic physiological characteristics, the diurnal variation of photosynthesis of different Cornus wilsoniana clones were conducted using the Li-6400 portable photosynthetic system during the flowering stage. The results showed as following: (1) The diurnal variation of net photosynthetic rate (Pn) of G-2、G-3、G-8、G-9 showed double-peak curve, while G-4、G-5、G-6、G-7、G-10、G-11、G-13、G-14、G-15 revealed single-peak one. The daily average of Pn of 12 clones could be divided into 3 categories. It is, G-6、G-7、G-8 for the first category with the maximum daily average of Pn, G-2、G-3、G-4、G-9、G-10、G-11、G-13、G-14、G-15 for the second category with the medium one, and G-5 for the third category with the minimum. (2) Similarly, based on the daily average of Tr, all the 12 clones could be diveded into 3 types too, namely, G-5、G-14、G-15 for low water consumption types, G-13 for medium one, and G-2、G-3、G-6、G-7、G-8、G-9、G-10、G-11 for the highest one. (3) G-8、G-14、G-15 belonged to high water use efficiency types, G-6、G-7、G-11、G-13 to medium one, and G-2、G-3、G-5、G-9、G-10 to low one. The WUE showed a fluctuating tendency, G-5、G-6、G-7、G-8、G-15 belonged to fluctuating clones, while G-9、G-10、G-11、G-13、G-14 showed more stable, and G-2、G-3 were the most stable ones.