Response of germinaton of different Flaveria bidentis populations to drought stress
The drought resistance of Flaveria bidentis seeds collected from 4 different habitats was tested under different osmotic potentials induced by PEG-6000 in order to provide evidence for evaluating the climate suitability and potential distribution of this invasive species. The result indicated that seed germination rate was prohibited under drought stress, and that the germination-related parameters, including germination rate, germination index, vigor index and germination stress index, decreased with in PEG concentrations. To be specific, the shoot length was stimulated at lower concentrations, while decreased at higher ones. However, the root length under stress varied significantly between populations. Based on the comprehensive evaluation index, the drought resistance of populations from 4 habitats decreased in the following order:orchard>roadside>river side>aban-doned land.
NETL
NSTL
万方数据
维普
