Abstract
Fragmentation and vegetative regeneration from small fragments may contribute to population expansion, dispersal and establishment of new populations of introduced plants. However, no study has systematically tested whether a high capacity of vegetative regeneration is associated with a high degree of invasiveness. For small single-node fragments, the presence of internodes may increase regeneration capacity because internodes may store carbohydrates and proteins that can be used for regeneration. We conducted an experiment with 39 stoloniferous plant species to examine the regeneration capacity of small, single-node fragments with or without attached stolon internodes. We asked (1) whether the presence of stolon internodes increases regeneration from single-node fragments, (2) whether regeneration capacity differs between native and introduced species in China, and (3) whether regeneration capacity is positively associated with plant invasiveness at a regional scale (within China) and at a global scale. Most species could regenerate from single-node fragments, and the presence of internodes increased regeneration rate and subsequent growth and/or asexual reproduction. Regeneration capacity varied greatly among species, but showed no relationship to invasiveness, either in China or globally. High regeneration capacity from small fragments may contribute to performance of clonal plants in general, but it does not appear to explain differences in invasiveness among stoloniferous clonal species.
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Acknowledgments
We thank Wei Guo for assistance with the experiment, Wayne Dawson for compiling the GCW data, Peter Alpert for valuable comments on the early version of the manuscript. This research was supported by the External Cooperation Program of the Chinese Academy of Sciences (Grant GJHZ0904 to FHY) and NSFC (Grant 31070371 to FHY; 39825106 to MD), and the Sino-Swiss Science and Technology Cooperation (Grant JRP IZLC3 123973 to MvK).
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Song, YB., Yu, FH., Li, JM. et al. Plant invasiveness is not linked to the capacity of regeneration from small fragments: an experimental test with 39 stoloniferous species. Biol Invasions 15, 1367–1376 (2013). https://doi.org/10.1007/s10530-012-0374-y
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DOI: https://doi.org/10.1007/s10530-012-0374-y