Baskin, Carol C. , Baskin, Jerry M. , Zheng, Yuanrun , Huang, Zhenying .
A seed dormancy-class profile for the steppes of Inner Mongolia, P. R. China.
FOR the first time, information on the world biogeography of seed dormancy is used to generate a dormancy-class profile for a specific geographical area with a distinct vegetation type. We selected the steppes of Inner Mongolia, P. R. China, for study and generated a list of 1228 species from floristic inventories of the area. Using the Baskin and Baskin data base, a seed dormancy-class, including nondormancy, was assigned to each of the 1228 species: nondormancy (ND) or morphological (MD), morphophysiological (MPD), physiological (PD), physical (PY), or combinational (PY+PD) dormancy. If data were available, assignment of a species to a dormancy class was made on the basis of studies on the species in China (S-C). When data were not available from China, assignment to dormancy class was based on studies of the same species in another country (S), on members of the same genus (G) or on members of the same family (F). For the 1228 species, 3.5, 17.1, 68.9, and 10.5% of them were assigned to a dormancy class based on S-C, S, G, and F, respectively. Thus, 89.5% of the species were assigned a dormancy class based on information at the species or genus level, where dormancy class is highly consistent. The proportion of Chinese steppe species with ND, MD, MPD, PD, PY, and (PY+PD) was 4.2, 0.2, 11.2, 75.8, 8.4, and 0.2%, respectively, compared to 7.3, 1.3, 5.3, 68.5, 17.3, and 0.3%, respectively, for a sample of 428 species (including 43 S-C) from the temperate grasslands/steppes of the world. -DU
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1 - University of Kentucky, Department of Biological Sciences, 101 Morgan Bld, Lexington, Kentucky, 40506-0225, USA
2 - Chinese Academy of Sciences, Institute of Botany, State Key Laboratory of Systematic and Evolutionary Botany, Haidian District, 20 Nanxincun, Xiangshan, Beijing, 100093, China
Presentation Type: Oral Paper:Papers for Sections
Date: Monday, July 31st, 2006
Time: 10:15 AM