Abstract
We compared seedling growth of four Artemisia species dominated at different habitats to determine whether interspecific seedling growth variation of a same genus in tolerance to burial can be used to explain plant distribution in the sand dune field. Interdune lowland species, Artemisia gmelinii, stabilized dune species, A. frigida, semi-stabilized dune species, A. halodendron, and active dune species, A. wudanica were selected. Seedlings grown for 3 weeks were treated at five burial depths for three burial times in pot experiments. Species from the habitats with little burial had smaller survival rate, dry weight and stem elongation speed than those from the habitats with intensive burial when buried. Furthermore, when buried, the former tended to adjust biomass allocation between shoot and root and produce adventitious buds, while the latter tended to maintain a constant root:shoot ratio and produce adventitious roots. We conclude that (1) seedlings of species with a long evolutionary history of exposure to sand burial (from the active sand dune), show quicker stem growth when buried than do seedlings of species from the habitats with little or no sand burial; (2) seedlings of species which do not change root:shoot ratio might be more tolerant of sand burial than those do; (3) seedlings of species from the habitats with intensive sand burial is prone to produce adventitious roots and seedlings of species from the habitats with little or no sand burial tend to produce adventitious buds when buried.
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Acknowledgements
We thank Qiaoling Yan, Hongmei Wang, Zhengning Wang and Junling Ma for assistance in the investigation and experiments. This work was financially supported by the project “effects of scale and spatial pattern on vegetation restoration in semi-arid dune fields”, funded by Shenyang Institute of Applied Ecology, Chinese Academy of Sciences.
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Communicated by H.G. Jones.
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Liu, B., Liu, Z. & Guan, D. Seedling growth variation in response to sand burial in four Artemisia species from different habitats in the semi-arid dune field. Trees 22, 41–47 (2008). https://doi.org/10.1007/s00468-007-0167-6
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DOI: https://doi.org/10.1007/s00468-007-0167-6