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Title: Allelopathic activity of dehulled rice and its allelochemicals on weed germination
Authors: Đỗ, Tấn Khang
La, Hoang Anh
Tran, Dang Khanh
Tran, Dang Xuan
Khuat, Huu Trung
Nguyen, Thanh Quan
Truong, Ngoc Minh
Phung, Thi Tuyen
Pham, Thi Thu Ha
Luong, The Minh
Nguyễn, Văn Quân
Keywords: Allelochemicals
Dehulled rice
Root exudates
Issue Date: 2016
Series/Report no.: International Letters of Natural Sciences;58 .- p.1-10
Abstract: In this study, the allelopathic potential of dehulled rice, rice, and hulls of rice on germination of weeds was evaluated in laboratory. Phenolic acids in growth media of these plants were also identified and quantified using HPLC. Identified allelochemicals were reversely tested for phytotoxic effects on germination and seedling growth of barnyardgrass, lettuce, radish and rice. The results showed that the inhibitory effects of dehulled rice were stronger than those of hulls and rice. Dehulled rice caused 66.7% and 50.6% reduction in radish root length and lettuce shoot height, respectively. Dehulled rice showed strong inhibitory effects on root length of lettuce and shoot height of radish while hulls and rice exhibited stimulation. Regarding phenolic identification, vanillin and vanillic acid were detected as allelochemicals in root exudates of rice and tested plants. The results revealed that most of the vanillin and vanillic acid treatments showed high inhibitory effects on germination rates and seedling growth of lettuce and radish, high stimulatory activity on root elongation of rice. Vanillic acid (100 ppm and 200 ppm), vanillin (100 ppm) and their mixture (200 ppm) completely inhibited survival of lettuce. The findings indicate the allelopathic potential of dehulled rice which can be used for identification of more phytotoxins to produce bioherbicides in agricultural practices.
ISSN: 2300-9675
Appears in Collections:Tạp chí quốc tế

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