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- Title
Effects of environmental stress (island vs. inland habitats) on allelopathic potential of tree species in South China.
- Authors
Chang, L. X.; Chen, B. M.; Liao, H. X.; Zhang, F. Y.; Zhang, H. J.; Zhou, T.; Chen, C. L.; Zhang, Z. K.
- Abstract
The environmental stress strongly affects the allelopathic potentials of plants. Compared with the inland environment, islands have strong environmental stresses (i.e., high soil salinity/air, thin soil layers strong wind). We studied the 7-Donor tree species (Eucalyptus urophylla Blake., Melastoma malabathricum L., Toxicodendron succedaneum (L.) Ktze., Litsea rotundifolia Hemsl. Var. oblongifolia (Nees) Allen., Rhodomyrtus tomentosa (Ait.) Hassk., Schefflera heptaphylla (L.) Frodin. and Acacia auriculiformis A. Cunn. ex Benth.) allelopathic potential from island and inland habitats on two recipient test plants: (i). Cabbage (Brassica oleracea var. capitata L.), (ii). Radish (Raphanus sativus L.). Furthermore, to better understand the altered allelopathic potentials due to environmental stresses, we determined the concentrations of flavonoids and phenols in plants from island and inland habitats. We found that lower concentrations of extracts of all 7-Donor trees had weaker allelopathic effects on recipient spp. However, higher concentrations of extracts of E. urophylla, M. malabathricum and T. succedaneum showed stronger allelopathic potentials, when growing on island than from inland plants. Whereas, L. rotundifolia, R. tomentosa and S. heptaphylla showed weaker allelopathic potentials, when growing on island than from inland plants. The allelopathic potential of A. auriculiformis did not differ between the island and inland populations. Except A. auriculiformis and S. heptaphylla, the total phenols concentrations of all 5-species caused the allelopathic potentials. However, total flavonoids were found only in L. rotundifolia, R. tomentosa and S. heptaphylla. This study showed that environmental stresses changed the allelopathic potentials of plants and various plant species and their phytochemicals depended on the environmental stresses.
- Subjects
CHINA; EUCALYPTUS; CABBAGE; PLANT phenols; SOIL salinity; ISLAND plants; BARRIER islands; HABITATS; SPECIES; ISLANDS
- Publication
Allelopathy Journal, 2020, Vol 50, Issue 1, p93
- ISSN
0971-4693
- Publication type
Article
- DOI
10.26651/allelo.j/2020-50-1-1277