作 者：
蔡金桓;都成林;薛立;叶自慧;佘汉基;李子华
单 位：
广州普邦园林股份有限公司;华南农业大学林学与风景园林学院
关键词：
大红花;龙船花;鹅掌藤;朱蕉;光合指标;盐胁迫;幼苗
摘 要：
利用人工浇盐的方式模拟野外盐环境,测定了大红花、龙船花、鹅掌藤和朱蕉幼苗的光合指标,分析盐胁迫对4种植物幼苗叶片光合作用的影响。结果表明:随着盐胁迫时间的延长,在0.3%盐浓度情况下,4种幼苗的P_n呈下降的趋势;大红花的G_s不断下降,其他植物先降后升;大红花和鹅掌藤的C_i不断下降,龙船花先降后升,朱蕉持续上升;大红花的T_r不断下降,其他植物先降后升。在0.6%盐浓度情况下,4种幼苗的P_n不断下降;大红花、龙船花和鹅掌藤的G_s先降后升,朱蕉不断下降;大红花、龙船花以及鹅掌藤的C_i先降后升,朱蕉先升后降;4种幼苗的Tr先降后升。从4种植物的P_n、G_s、C_i和T_r综合判断,大红花和鹅掌藤抗盐胁迫能力强,龙船花的抗盐胁迫能力中等,朱蕉的抗盐胁迫能力最差。
译 名：
Effects of NaCl Stress on Photosynthetic Characteristic of Garden Seedlings of 4 Species
作 者：
Cai Jinhuan;Dou Chenglin;Xue Li;Ye Zihui;She Hanji;Li Zihua;College of Forestry and Landscape Architecture,South China Agricultural University;Pubang Landscape Architecture Co.Ltd.;
关键词：
Hibiscus rosa-sinensis;;Ixora chinensis;;Schefflera arboricola;;Cordyline fruticosa;;photosynthetic index;;salt stress;;seedling
摘 要：
The effects of Na Cl stress on photosynthesis of seedlings of 4 species were studied to provide a reference for garden plant selection of salt tolerant. Seedlings of Hibiscus rosa-sinensis,Ixora chinensis,Schefflera arboricola,Cordyline fruticosa were placed in simulating salt environment,and then their photosynthetic indexes were determined. Results showed that at 0. 3% salt concentration,with increasing salt stress time,Pnof the 4 species continuously decreased. Gsof H. rosa-sinensis continuously decreased,whereas the other species decreased followed by an increase. Ciof H. rosa-sinensis and S. arboricola continuously decreased,and I. chinensis decreased followed by an increase,C. fruticosa continuously increased. Trof H. rosa-sinensi continuously decreased,and the other species decreased followed by an increase. At 0. 6% salt concentration,Pnof seedlings of the 4 species continuously decreased. Gsof H. rosa-sinensis,I. chinensis and S. arboricola decreased followed by an increase,C. fruticosa continuously decreased. Ciof H. rosa-sinensis,I. chinensis and S. arboricola decreased followed by an increase,whereas C. fruticosa increased and then decreased. Trof seedlings of the 4 species decreased followed by an increase. The overall judgment from Pn,Gs,Ciand Trof the 4 plant species,H. rosa-sinensis and S. arboricola had stronger salt tolerance among 4 species and was more suitable for cultivation in salt land,and salt tolerance of I. chinensis was medium,whereas that of C. fruticosa was weaker.
