violaxanthinn.

Brit.

/ˌvʌɪələˈzanθɪn/, U.S.

/ˌvaɪələˈzænθən/

Origin: Formed within English, by compounding; modelled on a German lexical item. Etymons: viola n.¹, xanthin n.

Etymology: < viola n.¹ + xanthin n., after German Viola-xanthin (R. Kuhn & A. Winterstein 1931, in Berichte der Deutsch. Chem. Ges. 64 327; now Violaxanthin).

Biochemistry.

A xanthophyll pigment widely distributed in plant chloroplasts, where it is involved in biochemical responses to excessive light levels, and present as a yellow colouring in flowers such as daffodils and yellow pansies.Chemical formula: C₄₀H₅₆O₄.

ΘΚΠ

the world > life > biology > substance > pigment > [noun] > plant pigments > yellow

quercitrin1833

anthoxanthin1836

xanthein1857

xanthin1857

phycoxanthin1873

phytochrome1893

zeaxanthin1929

violaxanthin1931

xanthophyll1931

1931 Chem. Abstr. 25 3351 The petals of the yellow pansy contain..a pigment wax which can be ext[racte]d with petroleum ether and on sapon[ification] yields a well-cryst[allize]d xanthophyll, viola-xanthin.

1965 P. Bell & D. Coombe tr. Strasburger's Textbk. Bot. (new ed.) 43 Over seventy different carotinoids are known. Of these we need refer here only to the carotin of the carrot.., to the lycopin of the tomato and other red fruits, and to the yellow violaxanthin.

1978 Nature 13 July 160/2 The photosynthetic pigments found in [the green alga] C[odium] fragile (β-carotene, zeaxanthin,..violaxanthin,..and chlorophyll b).

2008 L. O. Björn Photobiol. xxiv. 630 One way for the plant to regulate the dissipation of excess energy absorbed by the photosynthetic system is by adjusting the amount of violaxanthin and zeaxanthin through the reactions of the xanthophyll cycle.

This entry has been updated (OED Third Edition, June 2014; most recently modified version published online December 2021).

单词	violaxanthin
释义	violaxanthinn. Brit. /ˌvʌɪələˈzanθɪn/, U.S. /ˌvaɪələˈzænθən/ Origin: Formed within English, by compounding; modelled on a German lexical item. Etymons: viola n.¹, xanthin n. Etymology: < viola n.¹ + xanthin n., after German Viola-xanthin (R. Kuhn & A. Winterstein 1931, in Berichte der Deutsch. Chem. Ges. 64 327; now Violaxanthin). Biochemistry. A xanthophyll pigment widely distributed in plant chloroplasts, where it is involved in biochemical responses to excessive light levels, and present as a yellow colouring in flowers such as daffodils and yellow pansies.Chemical formula: C₄₀H₅₆O₄. ΘΚΠ the world > life > biology > substance > pigment > [noun] > plant pigments > yellow quercitrin1833 anthoxanthin1836 xanthein1857 xanthin1857 phycoxanthin1873 phytochrome1893 zeaxanthin1929 violaxanthin1931 xanthophyll1931 1931 Chem. Abstr. 25 3351 The petals of the yellow pansy contain..a pigment wax which can be ext[racte]d with petroleum ether and on sapon[ification] yields a well-cryst[allize]d xanthophyll, viola-xanthin. 1965 P. Bell & D. Coombe tr. Strasburger's Textbk. Bot. (new ed.) 43 Over seventy different carotinoids are known. Of these we need refer here only to the carotin of the carrot.., to the lycopin of the tomato and other red fruits, and to the yellow violaxanthin. 1978 Nature 13 July 160/2 The photosynthetic pigments found in [the green alga] C[odium] fragile (β-carotene, zeaxanthin,..violaxanthin,..and chlorophyll b). 2008 L. O. Björn Photobiol. xxiv. 630 One way for the plant to regulate the dissipation of excess energy absorbed by the photosynthetic system is by adjusting the amount of violaxanthin and zeaxanthin through the reactions of the xanthophyll cycle. This entry has been updated (OED Third Edition, June 2014; most recently modified version published online December 2021). < n.1931
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