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单词 xanthophyll
释义

Definition of xanthophyll in English:

xanthophyll

noun ˈzanθə(ʊ)fɪlˈzænθəˌfɪl
mass nounBiochemistry
  • A yellow or brown carotenoid plant pigment which causes the autumn colours of leaves.

    Example sentencesExamples
    • Concentrations of total carotenoids and total xanthophyll were greater for plants grown at low temperature.
    • These are chlorophyll's shy cousins, the yellow pigment xanthophyll and the red-orange carotene.
    • Retinal xanthophyll is a carotenoid, chemically related to vitamin A, whose absorption spectrum peaks at about 460 nm and ranges from 480 nm down to 390 nm.
    • Remove both chlorophyll and the yellow pigment xanthophyll and the variegation is white.
    • There is now an extensive literature based on in vivo and in vitro studies that deal with mechanistic aspects of xanthophyll pigment-dependent photoprotection.

Origin

Mid 19th century: from Greek xanthos 'yellow' + phullon 'leaf'.

 
 

Definition of xanthophyll in US English:

xanthophyll

nounˈzænθəˌfɪlˈzanTHəˌfil
Biochemistry
  • A yellow or brown carotenoid plant pigment which causes the autumn colors of leaves.

    Example sentencesExamples
    • These are chlorophyll's shy cousins, the yellow pigment xanthophyll and the red-orange carotene.
    • Retinal xanthophyll is a carotenoid, chemically related to vitamin A, whose absorption spectrum peaks at about 460 nm and ranges from 480 nm down to 390 nm.
    • Concentrations of total carotenoids and total xanthophyll were greater for plants grown at low temperature.
    • Remove both chlorophyll and the yellow pigment xanthophyll and the variegation is white.
    • There is now an extensive literature based on in vivo and in vitro studies that deal with mechanistic aspects of xanthophyll pigment-dependent photoprotection.

Origin

Mid 19th century: from Greek xanthos ‘yellow’ + phullon ‘leaf’.

 
 
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更新时间:2024/12/22 18:09:37