Plant Soil Environ., 2010, 56(12):551-556 | DOI: 10.17221/41/2009-PSE

Physiological response of Monimopetalum chinense to light stress under habitat fragmentation

C.Y. Hao1,2, R. Fan1, H.S. Wu1, X.P. Zhang2,3, L. Wang2,3, W.L. Chen2,3, Z.L. Chen4
1 Spice and Beverage Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wanning, P.R. China
2 Provincial Key Laboratory of Conservation and Employment of Biological Resources, Anhui Normal University, Wuhu, P.R. China
3 Environment and Ecological Safety of Colleges in Anhui Province, Anhui Normal University, Wuhu, P.R. China
4 The Administration Bureau of Dapanshan National Natural Reserve, Pan'an,

To determine the effect of light stress under fragmental habitat on the physiology, this paper investigated the physiological responses of Monimopetalum chinense with different light intensities in the Xianyu Mountains (Anhui, China). The study showed that both weak and intense light brought about by habitat fragmentation could improve antioxidant enzymes activities, and promote electrical conductivity and malondialdehyde content of M. chinense leaves. However, too strong light could inhibit photosynthesis rates, superoxide dismutase, catalase, and ascorbate peroxidase activities. In addition, the characteristics of leaves were affected by light intensity at the fragmental habitat. Specifically, intense light was disadvantageous to photosynthesis and antioxidant enzymes of the species. Our results suggest that the biodiversity conservation of M. chinense is necessary, and that light intensity should be considered carefully when implementing conservation efforts.

Keywords: endangered; photosynthesis rate; antioxidant enzymes; electrical conductivity; lipid peroxidation

Published: December 31, 2010  Show citation

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Hao CY, Fan R, Wu HS, Zhang XP, Wang L, Chen WL, Chen ZL. Physiological response of Monimopetalum chinense to light stress under habitat fragmentation. Plant Soil Environ. 2010;56(12):551-556. doi: 10.17221/41/2009-PSE.
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