Effect of back reactions in the S-cycle on photosynthesis in very weak light
Björn, Lars Olof LU
(1995)
In Photosynthesis Research
46(1-2).
p.203-206
- Abstract
- Photosynthesis in light which is so weak that excitation rates are comparable to the decay rates of S-states is modelled. It is found that oxygen evolution rate varies in a non-linear way with Photosystem II excitation rate in this region, but asymptotically approaches a linear relationship (with a slope of one oxygen molecule per four excitations) as excitation rate increases. The asymptote gives an intercept (zero oxygen evolution rate) on the excitation rate axis. The question is raised, whether this model is compatible with photoautotrophy in a red alga found at 268 m depth and able to carry out photosynthesis in extremely weak light. It is found that no unorthodox mechanisms for the S-cycle in this alga have to be assumed to explain... (More)
- Photosynthesis in light which is so weak that excitation rates are comparable to the decay rates of S-states is modelled. It is found that oxygen evolution rate varies in a non-linear way with Photosystem II excitation rate in this region, but asymptotically approaches a linear relationship (with a slope of one oxygen molecule per four excitations) as excitation rate increases. The asymptote gives an intercept (zero oxygen evolution rate) on the excitation rate axis. The question is raised, whether this model is compatible with photoautotrophy in a red alga found at 268 m depth and able to carry out photosynthesis in extremely weak light. It is found that no unorthodox mechanisms for the S-cycle in this alga have to be assumed to explain its performance. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/134489
- author
- Björn, Lars Olof
LU
- organization
- publishing date
- 1995
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Photosynthesis Research
- volume
- 46
- issue
- 1-2
- pages
- 203 - 206
- publisher
- Springer
- external identifiers
-
- scopus:34249755198
- ISSN
- 0166-8595
- language
- English
- LU publication?
- yes
- id
- 41c922d8-1462-4c1c-b910-aa2e95f915b2 (old id 134489)
- date added to LUP
- 2016-04-01 15:41:40
- date last changed
- 2021-01-03 03:23:04
@article{41c922d8-1462-4c1c-b910-aa2e95f915b2,
abstract = {{Photosynthesis in light which is so weak that excitation rates are comparable to the decay rates of S-states is modelled. It is found that oxygen evolution rate varies in a non-linear way with Photosystem II excitation rate in this region, but asymptotically approaches a linear relationship (with a slope of one oxygen molecule per four excitations) as excitation rate increases. The asymptote gives an intercept (zero oxygen evolution rate) on the excitation rate axis. The question is raised, whether this model is compatible with photoautotrophy in a red alga found at 268 m depth and able to carry out photosynthesis in extremely weak light. It is found that no unorthodox mechanisms for the S-cycle in this alga have to be assumed to explain its performance.}},
author = {{Björn, Lars Olof}},
issn = {{0166-8595}},
language = {{eng}},
number = {{1-2}},
pages = {{203--206}},
publisher = {{Springer}},
series = {{Photosynthesis Research}},
title = {{Effect of back reactions in the S-cycle on photosynthesis in very weak light}},
volume = {{46}},
year = {{1995}},
}