PJB-2019-376
Phytotoxicity of root exudates of invasive Solidago canadensis on co-occurring native and invasive plant species
Beifen Yang and Junmin Li
Abstract
The mechanisms underlying the dominance of Solidago canadensis in invaded communities are unclear. We conducted a multi-species experiment to test whether the root exudates of S. canadensis inhibited both the native species and the invasive species in the invaded communities. The results showed that the root exudates from S. canadensis had significant phytotoxic effects on the root length, plant height, basal diameter, and the root, stem, leaf, and total biomass of seven plant species. The inhibition rate of root exudates on the plant height, basal diameter, root length, and total biomass was dose-dependent and species dependent. Species origin (native vs. invasive) had no significant effect on response to root exudates. Root exudates from S. canadensis had similar inhibition effects on the growth of native plants and invasive plants in the low concentration treatment, while the effects on the growth of native plants were greater than those on invasive plants in the high concentration treatment. These results indicated that the phytotoxic root exudates of S. canadensis might play an important role in the allelopathic capacities of this species.
To Cite this article:
Yang, B. and J. Li. 2022. Phytotoxicity of root exudates of invasive Solidago canadensis on co-occurring native and invasive plant species. Pak. J. Bot., 54(3): DOI: http://dx.doi.org/10.30848/PJB2022-3(26)
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