Photosynthetica 2007, 45(2):167-171 | DOI: 10.1007/s11099-007-0028-y

C4 plants in the deserts of China: occurrence of C4 photosynthesis and its morphological functional types

R. Z. Wang1
1 Laboratory of Quantitative Vegetation Ecology, Institute of Botany, the Chinese Academy of Sciences, Xiangshan, Beijing, China

C4 photosynthetic pathway and morphological functional types were determined for 104 species in 45 genera and 10 families from the deserts of China. 67 C4 species (64.4 %) were found in Dicotyledoneae (e.g. Chenopodiaceae, Polygonaceae, and Amaranthaceae), the other 37 species were in Monocotyledoneae (e.g. Gramineae, Cyperaceae, and Commelinaceae). 36.5 % of the Chenopodiaceae species (predominantly members of the genera Anabasis, Atriplex, Kochia, Salsola, and Suaeda) identified in the desert regions were found with C4 photosynthesis, which was about 48 % of the total C4 species. Many C4 species (58.7 %) were annuals (e.g. Amaranthus, Atriplex, Digitaria, Eragrostis, Kochia, and Salsola) and experienced long-term droughts, high temperature, and high irradiance. Relatively more shrub C4 species (28 species of 104) were found in Chenopodiaceae (e.g. Anabasis, Camphorosma, Haloxylon, and Salsola) and Polygonaceae (e.g. Calligonum) in the desert regions. Most of shrub C4 species with small leaf area were no more than 1 m in height and distributed in sandy soils. Composition of relatively more annual species, shrubs, and Chenopodiaceae C4 species was the primary characteristic for the C4 species occurrence in deserts, and this was remarkably related with the arid environmental conditions.

Additional key words: annual plants; Chenopodiaceae; forbs; grasses; shrubs

Received: April 20, 2006; Accepted: August 31, 2006; Published: June 1, 2007  Show citation

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Wang, R.Z. (2007). C4 plants in the deserts of China: occurrence of C4 photosynthesis and its morphological functional types. Photosynthetica, 45(2), 167-171. doi: 10.1007/s11099-007-0028-y
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