四种水库消落带植物对水淹环境的适应性研究

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Abstract

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 species which 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.

Key words： water-level-fluctuation-zone plant submergence adaptability

Received: 25 August 2013

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	Articles by authors
	LIU Song-ping
	LI Qiu-hua
	ZHI Chong-yuan
	LI Xiao-feng
	CHEN Feng-feng
	JIANG Yao
	JIAO Shu-lin

Cite this article:

LIU Song-ping,LI Qiu-hua,ZHI Chong-yuan, et al. Adaptability traits of four plants in the water-level-fluctuation-zone of reservoir to submergence[J]. , 2013, 32(4): 462-468.

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http://www.ecolsci.com/EN/ OR http://www.ecolsci.com/EN/Y2013/V32/I4/462

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