The effect of membrane stabilizers on phytochrome-controlled anthocyanin biosynthesis in Brassica oleracea

Kinetin Effects on the Formation of Flavonoids in Buckwheat Cotyledons Depending on the Timing and Illumination Conditions of the Treatment

“…The results of the present study do not allow any direct conclusion about the immediate mechanisms of kinetin action underlying the improvement of conditions for intracellular transport. However, all observed effects fully agree with the idea that the mechanisms involve an increase in the permeability of cell membranes as a decisive factor facilitating movement of precursor molecules to the site of flavonoid biosynthesis (Pecket, Bassim, 1974;Bassim, Pecket, 1975;Nakamura et ah, 1980;Laa-nest, Margna, 1985;Марта et ah, 1985). In several recent works direct evidence for a high capacity of kinetin in increasing membrane permeability has been obtained (Stillwell, Hester, 1983;Szweykowska, Schneider, 1986).…”

Biosynthesis of Anthocyanins: A Process Not Specifically Controlled by Light

“…In this respect particular attention should be given to the data obtained in experiments with using kinetin, n-propanol, dimethylsulfoxide, and several other compounds which are known to increase the permeability of cell membranes. Resulting from treatments with such membrane-active compounds, considerable stimulation of anthocyanin formation was obtained in dark-grown red cabbage, sunflower, mung bean, and mustard seedlings (Pecket, Bassim, 1974a,b;Bassim, Pecket, 1975;Servettaz et al, 1975;Dumortier, Vendrig, 1978Whitelam, Johnson, 1981), and also in Spirodela fronds (Elliott, 1977). Exogenous shikimic and cinnamic acids introduced after a treatment with kinetin or n-propanol promoted an intense accumulation of anthocyanins in red cabbage seedlings, while both of them remained without effect when fed to untreated material (Pecket, Bassim, 1974a,b).…”

“…Convincing evidence is accumulating that stimulatory light effects on flavonoid accumulation are not due to a direct action of light on flavonoid enzymes but probably arise from the increased availability and production of initial substrates (Pecket, Bassim, 1974 a, b;Bassim,, Pecket, 1975;Amrhein, Hollander, 1981;Margna, Väinjärv, 1983;Тохвер, Ыннепалу, 1982;Марта et ai., 1983).…”