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

Margna, U; Vainjärv, T

doi:10.3176/biol.1989.3.08

Cited by 1 publication

(2 citation statements)

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“…Kinetin was shown to promote anthocyanin synthesis in petals of Impatiens balsamina (Klein & Hagen, 1961) and Rosa hybrida (Nakamura et al, 1980), and in seedlings of Brassica oleracea (Pecket & Bassim, 1974), Fagopyrum esculentum (Margna & Vainjirv, 1983), and Arabidopsis thaliana (Deikman & Hammer, 1995). An increase in the accumulation of other flavonoid compounds such as rutin and glycosylflavones in Fagopyrum esculentum cotyledons (Margna & Vainjdrv, 1983, 1989 and glycosylflavones in Hordeum vulgare leaves (Laanest & Margna, 1985) as a response to kinetin treatment has also been observed. However, there are examples where cytokinin inhibited anthocyanin formation, for example, in the cotyledons of Sinapis alba (Tong et al, 1983).…”

Section: Introductionmentioning

confidence: 99%

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Comparison of Light and Kinetin Effects on Anthocyanin Biosynthesis in Buckwheat Seedlings

Tohver¹,

Laanest²,

Palm³

1997

Proceedings of the Estonian Academy of Sciences. Biology. Ecolo

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The time courses of light-and kinetin-induced anthocyanin accumulation in buckwheat cotyledons were compared by two characteristic parameters: duration of the lag phase and the steady-state accumulation rate. Light and kinetin were applied either separately, simultaneously, or in succession with the second factor applied after the full development of the response to the first one. The lag phase of the response after onset of light was 4 h, and after kinetin application 7 h. Simultaneous treatment of cotyledons with light and kinetin did not alter the rapidity of their responses. Prolonged pretreatment of cotyledons with light or kinetin prior to the application of the other factor did not eliminate the lag phase in the appearance of the response to the factor applied later. The accumulation rate of anthocyanin in response to combined treatment after complete development of the response was in all treatment regimes greater than the sum of separate light and kinetin effects. Our results indicate that the action of light on anthocyanin accumulation is not related to kinetin, but kinetin action is favoured by light. It is suggested that the enhancement of lightand kinetin-induced anthocyanin accumulation in cotyledons pretreated with the other factor reflects an increase in the number of anthocyanin-producing cells.

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Section: Introductionmentioning

confidence: 99%

“…Earlier physiological and biochemical studies have pointed to phenylalanine supply and intracellular transport as a potential regulatory factor for flavonoid synthesis (Margna, 1977). This, in its turn, may be regulated by light and kinetin (Margna & Vainjérv, 1983, 1989Tohver, 1990;Tohver et al, 1996).…”

Section: Introductionmentioning

confidence: 99%