Interactive effects of elevated CO2 and temperature on the anatomical characteristics of leaves in eleven species |
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Authors: | Han Mei Ji Chengjun Zuo Wenyun He Jinsheng |
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Affiliation: | (1) Department of Ecology, College of Environmental Sciences and Key Laboratory for Earth Surface Process of the Ministry of Education, Peking University, Beijing, 100871, China |
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Abstract: | The anatomical features of leaves in 11 species of plants grown in a temperature gradient and a temperature + CO2 gradient were studied. The palisade parenchyma thickness, the spongy parenchyma thickness and the total leaf thickness were measured and analyzed to investigate the effects of elevated temperature and CO2 on the anatomical characteristics of the leaves. Our results show that with the increase of temperature, the leaf thickness of C4 species increased while the leaf thickness of C3 species showed no constant changes. With increased CO2, seven out of nine C3 species exhibited increased total leaf thickness. In C4 species, leaf thickness decreased. As for the trend on the multi-grades, the plants exhibited linear or non-linear changes. With the increase of temperature or both temperature and CO2 for the 11 species investigated, leaf thickness varied greatly in different plants (species) and even in different branches on the same plant. These results demonstrated that the effect of increasing CO2 and temperature on the anatomical features of the leaves were species-specific. Since plant structures are correlated with plant functions, the changes in leaf anatomical characteristics in elevated temperature and CO2 may lead to functional differences. Translated from Acta Ecologica Sinica, 2006, 26(2): 326–333 [译自: 生态学报] |
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Keywords: | CO2 concentration gradient temperature gradient leaf anatomical characteristics C3 species C4 species |
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