摘要
采用OS-1P型调制荧光仪测定自然生长的龙船花、希茉莉和三角梅3种园林花卉植物的叶绿素荧光参数日变化。结果表明:3种花卉植物的即时最大荧光产量(Fm')和实际光化学量子产量(Yield)随着光照强度的增加先降后升,在午间(12:00—14:00)达到最低值;表观光合电子传递速率(ETR)和非光化学淬灭(NPQ)随着光照强度的增加先升后降。3种花卉植物在强光下均表现出可逆的光抑制,均能通过增加热耗散来保护光系统。3种植物比较,以三角梅更能适应强光环境。
Diurnal changes of chlorophyll fluorescence parameters of lxora chinensis, Hamelia patens and Bougainvillea glabra under natural condition were studied using OS-1P-type modulation fluorescence analyzer. The results showed that, instant maximum fluores- cence yield （Fro＇） and actual photochemical quantum yield （Yield） of the three ornamental and floral plants decreased firstly and then increased with increasing light intensity, and their lowest values occurred between 12：00 to 14： 00. Their diurnal changes of appar- ent photosynthetic electron transport rate （ETR） and non-photochemical quenching （NPQ） increased firstly and then decreased with increasing light intensity. The three floral plants were subject to reversible photoinhibition under strong light, and protected the photo- system by increasing heat dissipation. The comparison of the diurnal changes of fluorescence parameters among the three plants showed that B. glabra was the most adaptable species to strong light environment.
出处
《湖南林业科技》
2013年第1期32-35,72,共5页
Hunan Forestry Science & Technology
基金
广东省林业局资助项目(F09054)
关键词
龙船花
希茉莉
三角梅
叶绿素荧光
日变化
lxora chinensis
Hamelia patens
Bougainvillea glabra
chlorophyll fluorescence
diurnal changes
