Changes of Chloroplast-Mediated Electron Transport Activity and Chlorophyll-Protein Complexes in Barley Seedlings by Decursinol

Decursinol 처리에 따른 보리 유식물의 전자전달 활성과 엽록소-단백질 복합체의 변화에 대하여

The effects of decursinol and decursin on chloroplast-mediated electron transport and phosphorylation in barley seedlings were investigated in comparison with coumarin in the dark or light. The changes of CP-complexes were also studied. Decursinol, decursin and coumarin caused marked inhibitory effects on germination of seed and electron transport and phosphorylation activity of seedlings. The following order of inhibitory effectiveness was exhibited; decursinol>coumarin>decursin. Loss of chlorophyll and decrease of electron transport activity were retarded in the dark, but were reversely accelerated in the light by these three chemicals. The changes of CP-complex patterns were also similar to effects on chlorophyll content and the electron transport activity. These opposite effect in the dark and light suggest that these three chemicals act as natural growth retardants rather than cytokinins or growth inhibitors.