Seed germination and seedling development ecology in world-wide populations of a circumboreal Tertiary relict

dc.contributor Middle Tennessee State University. Biology Department. en_US Walck, Jeffrey L. en_US Karlsson, Laila M. en_US Milberg, Per en_US Hidayati, Siti N. en_US Kondo, Tetsuya en_US 2014-06-24T15:32:02Z 2014-06-24T15:32:02Z 2012-03-04 en_US
dc.description.abstract Background and aims: Temperate forests are disjunct in the Northern Hemisphere, having become fragmented from the earlier widespread (Tertiary) boreotropical forest. We asked What are the contemporary patterns of population variation in ecological traits of a Tertiary relict in a macroecological context?. This issue underpins our understanding of variation in populations occurring in the same biome but on different continents. en_US
dc.description.abstract Methodology: We examined characters associated with root and shoot emergences among populations of Viburnum opulus in temperate forests of Asia, North America and Europe. This species has complex seedling emergence extending over several years and requiring various temperature cues. en_US
dc.description.abstract Principal results: Populations varied in germination responses and clustered into groups that were only partly related to varietal status. Whereas roots (at warm temperatures) and shoots (following a cold period) simultaneously emerged from seeds of all populations when simulated dispersal occurred in winter, they were delayed in some populations when dispersal occurred in summer. en_US
dc.description.abstract Conclusions: Viburnum opulus populations, some separated by 10 300 km, showed high similarity in seedling development and in germination phenology, and we suggest that stabilizing selection has played a key role in maintaining similar dormancy mechanisms. Nevertheless, there was some degree of variation in other germination characters, suggesting local adaptation. en_US
dc.identifier.citation AoB Plants. 2012 Mar 4;2012:pls007 en_US
dc.rights This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. en_US
dc.title Seed germination and seedling development ecology in world-wide populations of a circumboreal Tertiary relict en_US
dc.type Research Article en_US
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