Kinetics of light-intensity adaptation in a marine planktonic diatom

✍ Scribed by A. F. Post; Z. Dubinsky; K. Wyman; P. G. Falkowski

• Book ID: 104756240
• Publisher: Springer-Verlag
• Year: 1984
• Tongue: English
• Weight: 684 KB
• Volume: 83
• Category: Article
• ISSN: 0025-3162
• DOI: 10.1007/bf00397454

✦ Synopsis

The marine planktonic diatom Thalassiosira weisflogii was grown in turbidostat culture under both continuous and 12 hL:12 hD illumination regimes in order to study the kinetics of adaptation to growth-irradiance levels. In both illumination regimes adaptation to a higher growthirradiance level was accompanied by an increase in cell division rates and a decrease in chlorophyll a cell -1. The rates of adaptation for both processes, derived from first order kinetic analysis, equaled each other in each experiment. The results suggest that during the transition from low-to-high growth-irradiance levels chlorophyll a is diluted by cell division and is not actively degraded.