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Pak. J. Bot., 47(6): 2135-2141, 2015. |
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Updated: 02-01-16 | ||||
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VARIABILITY OF HALOXYLON AMMODENDRON (C.A. MEY) BUNGE POPULATIONS FROM DIFFERENT HABITATS
CHAOYAN LV1,2,3, XIMING ZHANG2,3* AND GUOJUN LIU2,3
1Department of Agriculture and Technology, Zunyi Normal College, Zunyi 563002, China 2Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China 3Cele National Station of Observation and Research for Desert-Grassland Ecosystem in Xinjiang, Cele 848300, Xinjiang, China *Corresponding author’s e-mail: zhxm@ms.xjb.ac.cn; Tel: +86-991-7885440; Fax: +86-991-7885320
Abstract: Haloxylon ammodendron (C.A. Mey) Bunge occupies a wide range of different habitats in north-west China. The aim of this study was to quantify variation in population growth characteristics of H. ammodendron from different sites and to relate this variation to different environmental conditions. To this end, 6 populations with visible differences were chosen and a range of morphological as well as seed-related characteristics like density, height, crown, basal diameter, seed mass, 1000 seed weight, seed number, seed diameter and germination rate were measured. The variations in the averages of overall traits were explained. The differences between-populations were 33%, whereas those within population were 67%. The largest variation was detected in morphological-related traits between-populations (38%). In particular, the density, height, 1000 seed weight and germination rate differed strongly between populations. The population growth characteristics were closely related to the soil property at the sites of origin. The soil property can explain most of the variations in the morphological-related traits. They were concluded that the diversity of population growth characteristics in different habitats provides the potential of population reproduction and the protection of original habitats is extremely important.
Key words: Density, Habitat, Haloxylon ammodendron, Morphology, Seed, Variance components.
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