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phytochrome
[ fahy-tuh-krohm ]
noun
, Botany.
- a plant pigment that is associated with the absorption of light in the photoperiodic response and that may regulate various types of growth and development.
phytochrome
/ ˈfaɪtəʊˌkrəʊm /
noun
- botany a blue-green pigment existing in two interchangeable forms, present in most plants, that mediates many light-dependent processes, including photoperiodism and the greening of leaves
phytochrome
/ fī′tə-krōm′ /
- Any of a group of cytoplasmic pigments found in green plants and some green algae that absorb red light and regulate dormancy, seed germination, and flowering. Phytochromes consist of a bile pigment attached to a protein, and occur in an active and inactive form, each of which can be converted into the other depending on the wavelength of red light that is absorbed.
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Word History and Origins
Origin of phytochrome1
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