Spedtral properties of a pigmented body in Hymenomonas sp.: An extra-chloroplast organelle containing chlorophyll
✍ Scribed by Rodney A. Olson; William H. Jennings; Mary Belle Allen
- Book ID
- 102878781
- Publisher
- John Wiley and Sons
- Year
- 1967
- Tongue
- English
- Weight
- 704 KB
- Volume
- 70
- Category
- Article
- ISSN
- 0021-9541
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✦ Synopsis
In the chrysomonad Hymenomonas, a lamellar organelle of undefined function described previously in electron micrographs, is shown to be highly pigmented by absorption and fluorescence light microscopy. Absorption spectra of the lamellar organelle and the chloroplasts of Hymenomonas are presented. In comparison with the chloroplast the lamellar body appears to have an equal concentration of chlorophyll a and nearly three times the concentration of the 490 nm absorbing carotenoid. Fluorescence in the organelle is initially red as in the chloroplast; this is quickly replaced by an intense yellow emission. The rate at which the red fluorescence is replaced by the yellow is oxidation dependent and is quite rapid in the high intensity of the exciting light required for fluorescence micrographs. Possible roles of the organelle in cell metabolism or photochemistry which are considered and evaluated include: photosynthetic organelle, coccolithogenic organelle, symbiont and lysosome.