Effects of clonal integration on photosynthesis of the invasive clonal plant Alternanthera philoxeroides

被引:45
作者
Liu, J. [1 ]
He, W. M. [1 ]
Zhang, S. M. [1 ]
Liu, F. H. [1 ]
Dong, M. [1 ]
Wang, R. Q. [2 ]
机构
[1] Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
[2] Shandong Univ, Inst Environm Res, Jinan 250100, Peoples R China
基金
中国国家自然科学基金;
关键词
alligator weed; biological invasions; chlorophyll fluorescence; clonal plants; net photosynthetic rate; photosystem; 2; nutrient heterogeneity; stomatal conductance; sub-stomatal CO2 concentration; transpiration rate;
D O I
10.1007/s11099-008-0054-4
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
A greenhouse experiment examined whether clonal integration improves photosynthesis of ramets of alligator weed [Alternanthera philoxeroides (Mart.) Griseb.], a widespread invasive clonal plant in China, in heterogeneous (He) nutrient habitats. The connected pairs of ramets experienced different nutrient levels [high homogeneous (Ho) nutrient, low Ho nutrient, and two He nutrient treatments]. Clonal integration significantly improved the net photosynthetic rate, stomatal conductance, transpiration rate, and minimal and maximal chlorophyll fluorescence of ramets of alligator weed in low nutrient condition. These characteristics may contribute to the success of the ramets of alligator weed in invading contrasting habitats. The clonal integration of the invasive clonal plants may contribute significantly to their invasiveness.
引用
收藏
页码:299 / 302
页数:4
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