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Food plants rich in anthocyanins include the blueberry, raspberry, black rice, and black soybean, among many others that are red, blue, purple, or black. Some of the colors of autumn leaves are derived from anthocyanins. [1] [2] Anthocyanins belong to a parent class of molecules called flavonoids synthesized via the phenylpropanoid pathway.
In bryophytes, anthocyanins are usually based on 3-desoxyanthocyanidins located in the cell wall. A new anthocyanidin, riccionidin A, has been isolated from the liverwort Ricciocarpos natans . It could be derived from 6,7,2′,4′,6′-pentahydroxyflavylium, having undergone ring closure of the 6’ -hydroxyl at the 3-position.
Anthocyanins are most visible in the petals of flowers of many species. [5] Plants, in general, contain six ubiquitous carotenoids: neoxanthin, violaxanthin, antheraxanthin, zeaxanthin, lutein and β-carotene. [7] Lutein is a yellow pigment found in fruits and vegetables and is the most abundant carotenoid in plants.
Representative chemical structure of one of many plant ... flavanones, isoflavones, proanthocyanidins, and anthocyanins. ... Other examples of compounds ...
Ideain is the main anthocyanin in red-skinned [1] or red-fleshed (for example Weirouge) [2] apple varieties. It is also found in Chinese hawthorn fruits (Crataegus spp.). [3]It is also the pigment in the copper beech (cultivar of Fagus sylvatica), that was identified in 1932.
Both betalains and anthocyanins are water-soluble pigments found in the vacuoles of plant cells. However, betalains are structurally and chemically unlike anthocyanins and the two have never been found in the same plant together. [7] [8] For example, betalains contain nitrogen whereas anthocyanins do not. [2]
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Blue color inflorescences of Hydrangea macrophylla. A metalloanthocyanin is a chemical complex giving color to petals of certain plants.. These complexes are self-assembled, supramolecular metal complex pigment composed of stoichiometric amounts of anthocyanins, flavones, and metal ions.