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Understanding the wide geographic range of a clonal perennial grass : plasticity versus local adaptation

Understanding the wide geographic range of a clonal perennial grass : plasticity versus local adaptation

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Prüfsumme: MD5:900015d5ff558be899a0cc2be877274f

LIU, Yanjie, Lirong ZHANG, Xingliang XU, Haishan NIU, 2016. Understanding the wide geographic range of a clonal perennial grass : plasticity versus local adaptation. In: AoB Plants. 8, plv141. eISSN 2041-2851

@article{Liu2016Under-33629, title={Understanding the wide geographic range of a clonal perennial grass : plasticity versus local adaptation}, year={2016}, doi={10.1093/aobpla/plv141}, volume={8}, journal={AoB Plants}, author={Liu, Yanjie and Zhang, Lirong and Xu, Xingliang and Niu, Haishan}, note={Article Number: plv141} }

Xu, Xingliang 2016-04-20T07:39:17Z Zhang, Lirong Liu, Yanjie Xu, Xingliang Understanding the wide geographic range of a clonal perennial grass : plasticity versus local adaptation 2016-04-20T07:39:17Z eng Niu, Haishan 2016 Liu, Yanjie Zhang, Lirong Both phenotypic plasticity and local adaptation may allow widely distributed plant species to either acclimate or adapt to environmental heterogeneity. Given the typically low genetic variation of clonal plants across their habitats, phenotypic plasticity may be the primary adaptive strategy allowing them to thrive across a wide range of habitats. In this study, the mechanism supporting the widespread distribution of the clonal plant Leymus chinensis was determined, i.e. phenotypic plasticity or local specialization in water use efficiency (WUE; reflected by foliar δ<sup>13</sup>C). To test whether plasticity is required for the species to thrive in different habitats, samples were collected across its distribution in the Mongolian steppe, and a controlled watering experiment was conducted with two populations at two different sites. Five populations were also transplanted from different sites into a control environment, and the foliar δ<sup>13</sup>C was compared between the control and original habitats, to test for local specialization in WUE. Results demonstrated decreased foliar δ<sup>13</sup>C with increasing precipitation during controlled watering experiments, with divergent responses between the two populations assessed. Change in foliar δ<sup>13</sup>C (-3.69 ‰) due to water addition was comparable to fluctuations of foliar δ<sup>13</sup>C observed in situ (-4.83 ‰). Foliar δ<sup>13</sup>C differed by -0.91 ‰ between two transplanted populations; however, this difference was not apparent between the two populations when growing in their original habitats. Findings provide evidence that local adaptation affects foliar δ<sup>13</sup>C much less than phenotypic plasticity. Thus, plasticity in WUE is more important than local adaptation in allowing the clonal plant L. chinensis to occupy a wide range of habitats in the Mongolian steppe. Niu, Haishan

Dateiabrufe seit 20.04.2016 (Informationen über die Zugriffsstatistik)

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