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THE DIFFERENTIATION OF PIGMENTATION IN FLOWER PARTS. I. THE FLAVONOID PIGMENTS OF IMPATIENS BALSAMINA, GENOTYPE IIHHP r P r , AND THEIR DISTRIBUTION WITHIN THE PLANT
Author(s) -
Hagen Charles W.
Publication year - 1966
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1966.tb07296.x
Subject(s) - sepal , petal , pelargonidin , impatiens , kaempferol , biology , botany , flavonoid , cyanidin , anthocyanin , pigment , delphinidin , quercetin , biochemistry , stamen , chemistry , pollen , organic chemistry , cultivar , antioxidant
Chromatographic analysis of stems, sepals and petals of inbred Impatiens balsamina of the red‐flowered genotype llHHP r P r has revealed a characteristic assemblage of flavonoid pigments in each organ. The more conspicuous compounds have been identified or partially characterized. The stems possess 3‐monoglucosides of kaempferol, quercetin, pelargonidin, cyanidin and, presumably, delphinidin. The variety of pigments is less in flower parts than in stems, and less in petals than in sepals, but the flower parts exhibit a greater elaboration of substituents on the aromatic nuclei. The paired petals of mature flowers are pigmented by p‐coumaroyl and feruloyl esters of pelargonidin‐3, 5‐diglucoside supplemented by more highly substituted derivatives of pelargonidin and by large amounts of kaempferol as the aglycone and two glucosides. The distribution of pigments has significance in the biology of the plant as well as providing an approach to studies of factors which control flower differentiation.