FLASH SPECTROSCOPY AND FLASH FLUORIMETRY IN PHOTOSYNTHETIC STUDIES
Abstract
A comparative study of the flash induced forma tion of a pigment, X, absorbing at 515 millimicron in different classes of algae was made. This material X, still unidentified, had pre viously been observed principally in the green algae. The X is formed during saturating flashes also in the blue-green Anacystis nidulans and in the red Porphyridium Cruentum. In Porphyri dium, the ratio of the maximum X formation to total chlorophyll was observed to be only 10% of the value of this ratio in the green alga Chlorella. Another measured difference is that the rate constant for disappearance of X in the dark following a flash is five times as great in Porphyridium as in Chlorella. Since the role of X has not yet been established the possibility that it occurs as a non-photosynthetic inter mediate, specifically as a consequence of damag ing photo-oxidation processes was examined. The latter possibility was rejected when found that X formation in Chlorella could not be prevented in an atmosphere containing less than 0.1% oxygen.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 02, 1963
- Accession Number
- AD0409594
Entities
People
- Jerome L. Rosenberg
Organizations
- University of Pittsburgh