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Photosynthetic physio-response of Oligostachyum lubricum to atmospheric ozone stress
LI Ying1,2, CHEN Shuang-lin1, LI Ying-chun1, ZHUANG Ming-hao1, GUO Zi-wu1, GU Da-xing1
1. Research Institute of Subtropical Forestry, CAF, Fuyang Zhejiang, 311400, China; 2. Forestry College, Guizhou University, Guiyang Guizhou, 550025, China
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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 wordsOzone      Oligostachyum lubricum      photosynthetic pigments     
Received: 25 August 2012     
:  Q945.79  
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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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