algae/notes/photoinhibition.html

for class Monday April 21, 2003 lecture in ESR473

Photoinhibition

1. Review of photosynthetic kinetics, P vs. E curves and photoacclimation

Macintyre_etal_2002

suggest two options

photoinhibition

protection from oxidative damage

add one more -

diminishing returns due to architectual constraints

explain

 

2. Mechanistic model for photoinhibition

marshall_etal_2000.html

 

3. Empirical model for inhibition of photosynthesis

Dyphora model

 

4. Potential impact on algae in the environment

mixing may increase productivity by decreasing photoinhibition

Franks_and_Marra_1994.html

 

5. Reactive oxygen species - production and protection

recent talk at NWAS on H2O2 production

 

6. MAH - there is no photoinhibition separate from photosynthesis

a. saturation of light

Ek as the hinge between light and enzymatic limitation

alternate view from Poisson distribution of light hitting targets - poisson model

b. photoinhibition as a consequence of multiple hits to a pigment target

if a photon hits a target when it is "closed" there is a probability that it will do some damage and this damage will take some time to repair - poisson_photoinhibition.html