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几种银莲花光合特性的初步分析
梁雪妮;刘飞虎
1.云南大学成人教育学院;2.云南大学生命科学学院 云南昆明650091;3.云南昆明650091
摘要:
采用LI6400便携式光合仪分析昆明室外栽培的几种野生银莲花光合作用特性。净光合速率(Pn)和蒸腾速率(Tr)日变化均呈单峰曲线,前者的峰值出现在10~11点,后者的峰值出现在13点前后。在光强0~2000μmol·m2·s1条件下,Pn呈S曲线,光合补偿点为60~80μmol·m2·s1,饱和点为800μmol·m2·s1左右,但光强继续增加到1800μmol·m2·s1,Pn仍有少许提高;Tr随PAR的增加而缓慢地增加。在环境CO2浓度为0~350μmol·mol1条件下,Pn直线上升,草玉梅、秋牡丹和野棉花的光合CO2补偿点均为50μmol·mol1左右;Tr在环境CO2浓度25~350...
关键词:  银莲花    光补偿点    光饱和点    CO2补偿点    光合日变化
DOI:
分类号:
Fund project:云南省科技攻关项目“几种主要外销高档花卉的新品种选育及栽培示范”(编号:2001NG13)的部分内容
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