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Publication Type J
Authors Li, L. and X. M. Zhang
Title Germination strategies of two halophytes in Salt Desert of northwestern China
Source Science in China Series D-Earth Sciences
Author Keywords germination strategy halophytes salt desert Kalidium capsicum Suaeda physophora seed-germination haloxylon-ammodendron salinity temperature tolerance growth chenopodiaceae banks size responses
Abstract The effects of temperatures and salinities on germination of two halophytes, Kalidium capsicum and Suaeda physophora in northwestern China, were tested, and their seed size and seed production were compared. It was found that seed of Suaeda physophora germinate under 10 degrees C, even about 0(o)C, and at a wide temperature range of 10-301 degrees C. It showed about 50% germination in the concentration up to 0.7 mol/L NaCl; optimum germination temperature of Kalidium capsicum was between 20 degrees C and 30 degrees C. The concentration of less than 0.3 mol/L NaCl inhibited absolutely its germination. Germination recovery was observed when salinities were reduced and total germination percentage exceeded 90%. Seeds of Kalidium, capsicum showed no loss of viability while Suaeda physophora an annual loss of viability of 75% at room temperature. Mean weight of seeds of Suaeda physophora was about 8.5 times of Kalidium capsicum, whereas the number of seeds of the latter was more than 20 times of the former. Suaeda physophora was observed to be dependent on periodic precipitation in germination and seedling growth. It suggests the evident trace of the species with zonation pattern. On the other hand, the germination of Kalidium capsicum was affected by unpredictable rain and inundation. This species might be a type without zonation patterns in halophytes. It was concluded that both species are halophytes, but they are established successfully by different adaptation strategies in the early stage of life history.
Author Address Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Urumqi 830011, Peoples R China. Li, L (reprint author), Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Urumqi 830011, Peoples R China. hillwll@163.com
ISSN 1006-9313
ISBN 1006-9313
29-Character Source Abbreviation Sci. China Ser. D-Earth Sci.
Publication Date Jun
Year Published 2007
Volume 50
Beginning Page 115-121
Digital Object Identifier (DOI) 10.1007/s11430-007-5004-7
Unique Article Identifier WOS:000248375600014
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