INTERACTIONS AMONG PHOSPHATE UPTAKE, PHOTOSYNTHESIS, AND CHLOROPHYLL FLUORESCENCE IN NUTRIENT-LIMITED CULTURES OF THE CHLOROPHYTE MICROALGA DUNALIELLA TERTIOLECTA(1).

Phosphate-limited and phosphate-sufficient continuous cultures of the marine chlorophyte microalga Dunaliella tertiolecta Butcher were examined for their responses to the addition of phosphate. Phosphate-limited cultures showed a marked quenching of chl fluorescence following a pulse of phosphate. This response was absent from cells growing under phosphate-sufficient conditions.