Articles
CHANGES IN ANTHOCYANIN AND SELECTED PHENOLICS IN ‘KORCRISETT’ ROSE FLOWERS DUE TO SUBSTRATE PH AND FOLIAR APPLICATION OF SUCROSE
Article number
870_9
Pages
89 – 96
Language
English
Abstract
Phenolic compounds, especially anthocyanins, function as important secondary metabolites in rose flowers as they directly influence its visual attributes and thus the marketability of rose plants.
Their content levels depend both on internal and external factors and among the latter substrate pH and application of sucrose has been reported to alter their concentration.
The effect of substrate acidity (pH 3.3, 4.7 and 7.3) and foliar application of sucrose solution (0, 3 and 6%) on the number of flowers per plant and content levels of phenolics in petals of Rosa ×hybrida KORcrisett was studied and significant differences observed among pH and sucrose treatments.
Plants potted in a commercial substrate with pH 4.7 developed significantly more flowers compared to those planted in more acidic or alkaline substrate.
Moreover, sucrose treatments also had a significant positive effect on the number of flowers per plant; those sprayed with 3 and 6% sucrose developed more flowers than untreated plants.
The content levels of major anthocyanins (pelargonidin-3,5-di-O-glucoside and cyanidin-3,5-di-O-glucoside), quercetins (quercetin-3-O-rhamnoside and quercetin-3-O-glucoside), catechin and phenolic acids (caffeic acid, p-coumaric acid, gallic acid) were significantly affected by substrate acidity.
The flowers of plants potted in a commercial substrate with pH 4.7 contained significantly less anthocyanins and other phenolic compounds than those planted in pH 3.3 or 7.3, respectively.
In contrast, sucrose treatments had no significant effect on the content of phenolic compounds in rose petals.
Their content levels depend both on internal and external factors and among the latter substrate pH and application of sucrose has been reported to alter their concentration.
The effect of substrate acidity (pH 3.3, 4.7 and 7.3) and foliar application of sucrose solution (0, 3 and 6%) on the number of flowers per plant and content levels of phenolics in petals of Rosa ×hybrida KORcrisett was studied and significant differences observed among pH and sucrose treatments.
Plants potted in a commercial substrate with pH 4.7 developed significantly more flowers compared to those planted in more acidic or alkaline substrate.
Moreover, sucrose treatments also had a significant positive effect on the number of flowers per plant; those sprayed with 3 and 6% sucrose developed more flowers than untreated plants.
The content levels of major anthocyanins (pelargonidin-3,5-di-O-glucoside and cyanidin-3,5-di-O-glucoside), quercetins (quercetin-3-O-rhamnoside and quercetin-3-O-glucoside), catechin and phenolic acids (caffeic acid, p-coumaric acid, gallic acid) were significantly affected by substrate acidity.
The flowers of plants potted in a commercial substrate with pH 4.7 contained significantly less anthocyanins and other phenolic compounds than those planted in pH 3.3 or 7.3, respectively.
In contrast, sucrose treatments had no significant effect on the content of phenolic compounds in rose petals.
Authors
V. Schmitzer, F. Stampar
Keywords
Rosa ×hybrida, petals, pigments, quercetins, catechin, phenolic acids
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