四季竹对大气臭氧胁迫的光合生理响应

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Abstract

In order to provide a theoretical basis for bamboo forest management coping strategies in the context of climate change,we used open-top assimilation box(OTCs)to simulate four atmospheric O₃ concentrations,which were the background atmosphere(40-45 nl·L^-1),the reducing 1/2(22-25 nl·L^-1),the multiplying 1 times(92-106 nl·L^-1)and multiplying 2 times(142-160 nl·L^-1).We researched on the photosynthetic physio-response of Oligostachyum lubricum to atmospheric O₃ stress.The results showed that with the increasing of atmospheric O₃ concentration,the photosynthetic pigment content of O.lubricum leaves decreased gradually,and the atmospheric O₃ concentration of multiplying 1 times was a significant change node;the change of O₃ concentration had a complex effect on the diurnal variations of Pn of O.lubricum.The background atmosphere and the multiplying 2 times were "single peak" curves,while the reducing 1/2 and the multiplying 1 times were"Twin Peaks"curves.To the diurnal variations of Tr,four treatments of Tr showed"single peak" curves;whether the atmospheric O₃ concentration became higher or lower than the current environment,the photosynthetic physiology of O.lubricum would have a negative effect.When the O₃ concentration was doubled or above of the current environment background atmosphere,it would cause severe damage to O.lubricum,with the symptoms of degradation,or blocked synthesis of leaves' photosynthetic pigment,and decreased water using efficiency and capacity of photosynthetic.The influence of atmospheric O₃ concentration on the photosynthesis of O.lubricum performed for the stomatal limitation.

Key words： Ozone Oligostachyum lubricum photosynthetic pigments

Received: 25 August 2012

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	Articles by authors
	LI Ying
	CHEN Shuang-lin
	LI Ying-chun
	ZHUANG Ming-hao
	GUO Zi-wu
	GU Da-xing

Cite this article:

LI Ying,CHEN Shuang-lin,LI Ying-chun, et al. Photosynthetic physio-response of Oligostachyum lubricum to atmospheric ozone stress[J]. , 2012, 31(4): 390-395.

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http://www.ecolsci.com/EN/ OR http://www.ecolsci.com/EN/Y2012/V31/I4/390

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