桂花叶片水分含量及光合生理特性的研究  

Daily Change of Photosynthesis and Chlorophyll Fluorescence of Three Osmanthus fragrans Lour.Cultivars Leaf

作　　者：陈洪国[1] 姜军权[1] 孙全[1] 

机构地区：[1]咸宁学院化学与生命科学系,湖北咸宁437000

出　　处：《安徽农业科学》2006年第3期417-418,共2页Journal of Anhui Agricultural Sciences

基　　金：湖北省教育厅重点项目(2003A009)

摘　　要：以柳叶桂、山桂和四季桂3个桂花品种为试材,研究了其水分、光合色素的含量以及净光合速率(Pn)、蒸腾速率和叶绿素荧光(Fv/Fm)的日变化。结果表明:山桂和柳叶桂的各种水分和光合色素的含量差异不显著,但与四季桂差异显著,其Pn日变化和蒸腾速率日变化都呈现先上升后下降的单峰曲线;Pn峰值出现在10:00左右,而蒸腾速率的峰值出现在12:00左右,最大光化学效率日变化呈单峰曲线,但呈现先下降后上升趋势。Three cultivars of sweet Osmanthus, Liuyegui, Shangui and Sijigui were used as materials to investigate the content of water, photosynthetic pigment and the diurnal changes of photosynthesis（l%）, transpiration rate, chlorophyll fluorescence（ Fv/Fm）. The results showed that： the content of the water mid photosynthetic pigment in Liuyegui mid Shangui had no significant difference but more obvious difference thin1 Sijigui. The changes of 1% mid transpiration rate appeared singular peak that increased at first mid then decreased. The peak of 1% appeared at about 10 o＇clock am, while the peak of the transpiration rate appeared at about 12 o＇clock. The daily changes of maximal photochemistry efficiency appeared a tendency of falling firstly and then rising.

关 键 词：桂花 水分 光合色素 光合作用 蒸腾作用 叶绿素荧光 

分 类 号：S685.13[农业科学—观赏园艺]