title: Kinetics of photoaccumulation of β-carotene in Phycomyces blakesleeanus.
abstract: Upon carbon starvation the β-carotene content of Phycomyces mycelium grown on minimal agar medium disappears with a time lag of about 90 min and a T1/2 of 68-75 min. If continuous light is given 2 h after starvation, there is an increase in β-carotene content with respect to the dark control. This increase has a time lag of 20-25 min. The fluence rate-response curve of wt is biphasic and two mutants in the gene madA (madA7, madA35) and in the gene madB (madB101, madB104) have higher thresholds than wt; madB mutants are blinder than madA mutants. Only blue light is effective and we suggest that it has an effect solely on the catabolism of β-carotene.
authors.affiliation: Abteilung Trautner, Max-Planck-Institut für molekulare Genetik, Ihnestrasse 63/73, D-1000, Berlin 33, Germany.
authors.forename: G
authors.initials: G
authors.lastname: Raugei
authors.forename: U
authors.initials: U
authors.lastname: Dohrmann
authors.forename: U
authors.initials: U
authors.lastname: Pohl
authors.forename: V E
authors.initials: VE
authors.lastname: Russo