没食子酸と2,3,6-TBAの作用機構の比較

概要

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With a view to identifying new herbicide models in natural sources and also to investigating allelopathy phenomena among higher plants, the mode of action and biological activity of allelochemicals and herbicides with a similar chemical structure were compared The combination of gallic acid (3, 4, 5-trihydroxybenzoic acid, an allelochemical from Eucalyptus camedulensis) and 2, 3, 6-TBA (2, 3, 6-trichlorobenzoic acid, a benzoic acid herbicide) was investigated. The auxin activity was higher in 2, 3, 6-TBA than in gallic acid (Table 4). This activity was different from that of a simple acid growth inhibitor (Table 5). The inhibitory activity of gallic acid on the growth of rice plant (Oryza sativa L.) and barnyardgrass (Echinochloa crus-galli P Beauv var oryzicola Ohwi) was 1/50~1/100 times as high as that of 2, 3, 6-TBA and this activity was proportional to the auxin activity (Fig. 2). The auxin activity of gallic acid was compared with that of 2, 3, 6-TBA by applying the elongation test of Avena coleoptile segments, elongation test of pea hypocotyl segments, curvature test of slit pea (pea test) and extension test on the lamina joint of rice plant. The results of these tests suggested that although the mechanism of growth inhibition of both substances could be ascribed to auxin activity, the activity of gallic acid was weaker than that of 2 3 6-TBA.
日本雑草学会の論文
1986-12-25