title: Light-mediated Activation of Nitrate Reductase in Synchronous Chlorella.
abstract: The mechanism underlying the sharp increase in activity of nitrate reductase (EC 1.6.6.1) in Chlorella vulgaris forma tertia (strain 211 8k) during the first hour of the 7 hours/5 hours light/dark cycle was investigated. Using the method of density labeling and isopycnic centrifugation, it could be demonstrated that this rapid increase in activity is based on light-mediated activation rather than de novo synthesis of the enzyme. The problematic nature of cycloheximide specificity and models of nitrate reductase activation are discussed.
authors: Pflanzenphysiologisches Institut der Universität Göttingen, Germany.
authors: R
authors: R
authors: Tischner