Microscopic and submicroscopic observation of the effects of coumarin and colchicine during elongation of pine seedlings
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The effects of coumarin and colchicine were investigated on a microscopic and submicroscopic level. Both chemicals induced a high degree of cell swelling of intact pine seedlings in the concentration of 10^<-3> M^<-7> × 10^<-3> M coumarin and 6 × 10^<-3> M-10^<-2> M Colchicine. In seedlings radially enlarged due to coumarin treatment, primary phloem regions were characterized by cell crushing. Furthermore, protrusion of many large or small vesicle were found closely attached to the plasmalemma of parenchyma cells. The relationship of the latter evidence with the possibility of breakdown of the cell wall is discussed. Colchicine induced abnormal spiral thickenings, and the deposition of cell wall materials was somewhat disturbed when seedlings were treated with this chemical for a longer period (more than 10 days). Based on this evidence, it was suggested that colchicine did not completely destroy the organized pattern of spiral wall thickening.
- 日本植物生理学会の論文
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