Nuclear DNA C-value of alien invasive and native plants and its relationship with invasiveness
外来入侵植物和本地植物核DNA C-值的比较及其与入侵性的关系

The nuclear DNA C-values of 13 alien invasive, 6 native and 1 alien non-invasive plant species from 10 genera of 8 families were measured with flow cytometer. The mean nuclear DNA C-value of the 13 alien invasive species was significantly lower than those of the native and alien non-invasive species, but no consistent regularity was found for the different species of same genus. In the four genera including both alien invasive and native species, all the alien invasive species in Eupatorium and Bidens and one of the two alien invasive species in Alternanthera had significantly lower nuclear DNA C-values than their native congeners, while the alien invasive species in Peperomia had significantly higher nuclear DNA C-values than the native species. There was no certain correlation between nuclear DNA C-value and alien plant invasiveness.