Abstract
The photosynthetic oxygen evolution rate of the unicellular green algae Ankistrodesmus braunii slowly decreased in the course of time when the algae were illuminated only by interrupted or continuous red light. Illumination with blue-green light (493 nm and 2 min duration) instead of one red light exposure induced oxygen uptake and produced a higher efficiency of oxygen evolution in the following illuminations with red light.This effect has been observed with red light absorbed by chlorophyll a1 (wave-length longer than 680 nm) as well as with light of 647 nm which is mainly absorbed by chlorophyll b. For this reason and because of the long-lasting enhancement of the O2-evolution after a short blue-green illumination and the absence of the effect under anaerobic conditions, it is not possible to interpret this phenomenon as an Emerson-enhancement-effect.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
