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| The Responses of Morphological Trait, Leaf Ultrastructure, Photosynthetic and Biochemical Performance of Tomato to Differential Light Availabilities |
| FU Qiu-shi, ZHAO Bing, WANG Xue-wen, WANG Yu-jue, REN Shu-xin , GUO Yang-dong |
1. College of Agriculture & Biotechnology, China Agricultural University, Beijing 100193, P.R.China
2. School of Agriculture, Virginia State University, Petersburg, VA23806, USA
3. Department of Horticulture, Cornell University, Ithaca, NY14853, USA |
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摘要 The whole-plant morphology, leaf ultrastructure, photosynthesis as well as enzyme activities of two tomato cultivars (Meifen-2 and Hongsheng) to differential light availabilities (450-500 μmol m-2 s-1, 75-100 μmol m-2 s-1) were examined in controlled environment. The results showed that the plant biomass and root/shoot ratio decreased and the specific leaf area increased significantly under the low light condition. There was a significant increase in malondialdehyde (MDA) concentration, superoxide dismutase (SOD) and peroxidase (POD) activities and decrease in soluble sugar and protein contents in LL-grown plants. For both cultivars, downregulation of photosynthesis and electron transport components were observed in LL-grown plants, the inhibition of the photosynthesis under the LL condition could be partially explained by the decrease of stomata density and by the changes of chloroplast.
Abstract The whole-plant morphology, leaf ultrastructure, photosynthesis as well as enzyme activities of two tomato cultivars (Meifen-2 and Hongsheng) to differential light availabilities (450-500 μmol m-2 s-1, 75-100 μmol m-2 s-1) were examined in controlled environment. The results showed that the plant biomass and root/shoot ratio decreased and the specific leaf area increased significantly under the low light condition. There was a significant increase in malondialdehyde (MDA) concentration, superoxide dismutase (SOD) and peroxidase (POD) activities and decrease in soluble sugar and protein contents in LL-grown plants. For both cultivars, downregulation of photosynthesis and electron transport components were observed in LL-grown plants, the inhibition of the photosynthesis under the LL condition could be partially explained by the decrease of stomata density and by the changes of chloroplast.
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Received: 14 August 2010
Accepted:
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| Fund: This work was partly supported by the grants to Prof. Guo Yangdong (2009CB119000) and the Chinese Universities Scientific Fund (2009-2-06). |
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Corresponding Authors:
Correspondence GUO Yang-dong, Tel: +86-10-62734845, E-mail: yaguo@cau.edu.cn, Tel: +86-10-62734845; REN Shu-xin, Tel: +1-804-5243094, Fax: +1-804-
5245186, E-mail: sren@vsu.edu
E-mail: yaguo@cau.edu.cn
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Cite this article:
FU Qiu-shi, ZHAO Bing, WANG Xue-wen, WANG Yu-jue, REN Shu-xin , GUO Yang-dong.
2011.
The Responses of Morphological Trait, Leaf Ultrastructure, Photosynthetic and Biochemical Performance of Tomato to Differential Light Availabilities. Journal of Integrative Agriculture, 10(12): 1887-1897.
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