Physiological effects of 2, 4-dichloro-6-(orthochloroanilino)-1, 3, 5-s-triazine (Triazine, Dyrene) on the chlorophyll in the leaf of rice plant-1

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The writers studied on the change of chlorophyll content of rice plants spayed with 2, 4-dichloro-6-(orthochloroanilino)-1, 3, 5-s-triazine (Triazine, Dyrene). The rice plants were cultivated in soil without supplying fertilizers, and the chlorophyll content of the first, second, and third leaves from the top was measured 2, 4, and 8 days after spraying Triazine. In this experiment, there was no marked difference in the chlorophyll content between Triazine sprayed and control leaves. In the leaves of rice plants, cultivated with fertilizers, chlorophyll content was measured serially according to the leaf order from the top and days after spraying. Four days after the spraying chlorophyll-a increased in the descending order of sprayed plots: water, Triazine 2500ppm (high concentration) and 1250ppm (low concentration). Chlorophyll-b and the total amount of chlorophyll, however, rather showed a decreasing tendency in the sprayed plot of 2500ppm Triazine. Eight days after spraying, however, chlorophyll-a, -b, and total amount of chlorophyll increased in the leaves sprayed with Triazine.Summarizing these results, spraying Triazine upon leaves of rice plants seems to increase the content of chlorophyll-a and -b, but decrease chlorophyll-b when sprayed with high concentration of Triazine. The latter tendency, however, seems to diminish with the lapse of time.
日本植物病理学会の論文