Effect of enhanced ultraviolet-B on allelopathic potential of Zanthoxylum bungeanum |
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| Authors: | Hong-yi Li Kai-wen PanQing Liu Jin-chuang Wang |
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| Institution: | Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China |
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| Abstract: | The effect of enhanced ultraviolet-B on allelopathic potential of Zanthoxylum bungeanum was investigated. A significant inhibitory effect on germination rate of crop seeds under bioassay was observed at 25 g l−1 and 50 g l−1 by extracts from Zanthoxylum leaf both treated with enhanced ultraviolet-B radiation and untreated control. Medicago sativa and lettuce were more sensitive than radish to the extract from Zanthoxylum leaf treated with enhanced UV-B radiation, as the germination rates of M. sativa and lettuce were significantly reduced compared to control at 25 g l−1 and 50 g l−1, and so did alfalfa at 12.5 g l−1. However, as for radish (Raphanus sativus) there was no significant reduction in germination rate at any concentration under bioassay compared to control. Content of UV-B absorbing compounds and total phenols in Zanthoxylum seedlings responded positively to enhanced UV-B radiation. The results suggest that the allelopathic potential of Z. bungeanum was generally improved under enhanced UV-B radiation. |
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| Keywords: | Zanthoxylum bungeanum Allelopathic potential Alfalfa Lettuce Radish Enhanced ultraviolet-B Germination UV-B absorbing compounds |
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