Adaptability traits of four plants in the water-level-fluctuation-zone of reservoir to submergence
LIU Song-ping, LI Qiu-hua*, ZHI Chong-yuan, LI Xiao-feng, CHEN Feng-feng, JIANG Yao, JIAO Shu-lin
1. School of Life Science, Guizhou Normal University, Guiyang 550001, China; 2. Key Laboratory for Information System of Mountainous Area and Protection of Ecological Environment of Guizhou Province, Guizhou Normal University, Guiyang 550001, China; 3. School of Chemistry and Material Science, Guizhou Normal University, Guiyang 550001, China; 4. School of Chemistry and Material Science, Guizhou Normal University, Guiyang 550001, China
A submergence simulation experiment was conducted using four particular plants including Paspalum distichum, Alternanthera philoxeroides, Hemarthria altissima and Cynodon dactylon collected from the water-level-fluctuation-zone of Baihua Reservoir from July to October in 2011. To understand their adaptability traits, growth and chlorophyll contents were investigated under controlled condition. The results are as follows. Firstly, P. distichum, A. philoxeroides and H. altissima had significantly higher growth rate, whereas C. dactylon had significantly lower growth rate in submergence condition. Meanwhile, the shoots and leaves of four specieswhich were not adapted to the submergence condition were reduced. Secondly, the growth strategies of P. distichum, H. altissima and C. dactylon were primarily the developments of caudex, while those of A. philoxeroides were primarily growth of caudex and shoot. When the top of plant protruded water, submergence significantly enhanced the leaves growth rates of P. distichum, A. philoxeroides and H. altissima. Thirdly, complete submergence condition significantly reduced contents of both chlorophyll a and chlorophyll b of the four species, but the reduction was more prominent in chlorophyll b than in chlorophyll a. Chlorophyll a/chlorophyll b ratio increased significantly in four species. When the top of plant protruded water, the contents of both chlorophyll a and chlorophyll b of P. distichum, A. philoxeroides and H. altissima increased, but chlorophyll a/chlorophyll b ratio of them reduced significantly. At last, we concluded that the four species were adaptable to submergence or complete submergence.
刘送平, 李秋华*, 支崇远, 李小峰, 陈峰峰, 蒋瑶, 焦树林. 四种水库消落带植物对水淹环境的适应性研究[J]. , 2013, 32(4): 462-468.
LIU Song-ping, LI Qiu-hua*, ZHI Chong-yuan, LI Xiao-feng, CHEN Feng-feng, JIANG Yao, JIAO Shu-lin. Adaptability traits of four plants in the water-level-fluctuation-zone of reservoir to submergence. , 2013, 32(4): 462-468.
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