标题：Competition and soil fungi affect the physiological and growth traits of an alien and a native tree species
作者：Chen, H.;Wang, R. Q.;Ge, X. L.;Zhang, J.;Du, N.;Wang, W.;Liu, J.
作者机构：[Chen, H] Institute of Environment Research, Shandong University, No.27 Shandanan Road, Jinan 250100, China;[ Wang, R.Q] Institute of Environment Rese 更多
通讯作者地址：[Liu, J]Shandong Univ, Inst Environm Res, 27 Shandanan Rd, Jinan 250100, Peoples R China.
来源：Photosynthetica: International Journal for Photosynthesis Research
关键词：chlorophyll;competition;photosynthesis;Quercus acutissima;Robinia pseudoacacia;root nodule
摘要：Competition plays an important role in the replacement of native species by alien plants. A greenhouse experiment was conducted to investigate whether the competition pattern of alien Robinia pseudoacacia L. and native Quercus acutissima Carr. is affected by soil sterilization. Physiological traits, such as gas-exchange parameters and chlorophyll (Chl) content, and growth traits, such as the biomass accumulation of the two species, were examined in natural soil or in soil sterilized with benomyl. The results show that native Q. acutissima inhibits the growth of R. pseudoacacia in natural soil. When the two plants coexisted and competed under sterilization treatment, R. pseudoacacia was less inhibited by Q. acutissima and the competition of R. pseudoacacia decreased the growth of Q. acutissima in terms of biomass, Chl a, Chl b, total Chl, and Chl a/b. These results suggest that soil sterilization benefits the growth of R. pseudoacacia and changes the competition pattern by the changed soil biota. Soil sterilization increased the biomass of root nodules, which ultimately benefits the growth of R. pseudoacacia and root nodule bacteria may be important in the dispersal and invasion process of nitrogen-fixing alien plants such as R. pseudoacacia.