| 单词 |
protochlorophyll |
| 释义 |
protoˈchlorophyll Biochem.
[a. G. protochlorophyll (N. A. Monteverde 1893, in Acta Horti Petropolitana XIII. 210): see proto- and chlorophyll.]
A naturally occurring photoactive precursor of chlorophyll.
1894Jrnl. R. Microsc. Soc. 702 The same author [sc. Monteverde] finds, in etiolated leaves, besides xanthophyll and carotin, a pigment to which he gives the name protochlorophyll. It displays a distinct red fluorescence. 1928Science 7 Dec. 570/2 Protochlorophyll is not a decomposition product of some other organic substance, as leucophyll, but is a pigment which develops without the influence of light and changes photochemically into chlorophyll upon exposure to light. 1951Ann. Rev. Plant Physiol. II. 131 Protochlorophyll is a pale greenish pigment containing two hydrogen atoms less than chlorophyll. 1956E. I. Rabinowitch Photosynthesis II. xxxvii. 1759 Up to 90% of the protochlorophyll, accumulated in the dark, are quantitatively converted, within a minute or less of moderately strong illumination, into chlorophyll a. 1976Photochem. & Photobiol. XXIV. 555 We now extract cells with acetone... Protochlorophyll is obtained by extracting this solution with petroleum ether..and extracting this petroleum ether fraction with 80% acetone to remove substances which interfere with subsequent chromatography. |
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