Photosystem II photoinhibition and altered kinetics of photosynthesis during nutrient-dependent high-light photoadaptation in Gonyaulax polyedra

1986 ◽  
Vol 93 (1) ◽  
pp. 1-12 ◽  
Author(s):  
B. B. Pr�zelin ◽  
G. Samuelsson ◽  
H. A. Matlick
Keyword(s):  
Photosystem Ii ◽  
High Light ◽  
Gonyaulax Polyedra ◽  
Kinetics Of

Changes in the Stoichiometry of Photosystem II Components as an Adaptive Response to High-Light and Low-Light Conditions during Growth

1986 ◽  
Vol 41 (5-6) ◽  
pp. 597-603 ◽  
Author(s):  
Aloysius Wild ◽  
Matthias Höpfner ◽  
Wolfgang Rühle ◽  
Michael Richter
Keyword(s):  
Photosystem Ii ◽  
Functional Organization ◽  
Photosynthetic Apparatus ◽  
High Light ◽  
Molar Ratio ◽  
Light Conditions ◽  
Low Light ◽  
Pigment System ◽  
Transport Chain ◽  
The One

The effect of different growth light intensities (60 W·m-2, 6 W·m-2) on the performance of the photosynthetic apparatus of mustard plants (Sinapis alba L.) was studied. A distinct decrease in photosystem II content per chlorophyll under low-light conditions compared to high-light conditions was found. For P-680 as well as for Oᴀ and Oв protein the molar ratio between high-light and low-light plants was 1.4 whereas the respective concentrations per chlorophyll showed some variations for P-680 and Oᴀ on the one and Oв protein on the other hand.In addition to the study of photosystem II components, the concentrations of PQ, Cyt f, and P-700 were measured. The light regime during growth had no effect on the amount of P-700 per chlorophyll but there were large differences with respect to PQ and Cyt f. The molar ratio for Cyt f and PQ between high- and low-light leaves was 2.2 and 1.9, respectively.Two models are proposed, showing the functional organization of the pigment system and the electron transport chain in thylakoids of high-light and low-light leaves of mustard plants.

Probing the kinetics of Photosystem I and Photosystem II fluorescence in pea chloroplasts on a picosecond pulse fluorometer

1975 ◽  
Vol 408 (2) ◽  
pp. 143-153 ◽  
Author(s):  
V.Z. Paschenko ◽  
S.P. Protasov ◽  
A.B. Rubin ◽  
K.N. Timofeev ◽  
L.M. Zamazova ◽  
...  
Keyword(s):  
Photosystem Ii ◽  
Photosystem I ◽  
Picosecond Pulse ◽  
Kinetics Of

scholarly journals On the role of exchangeable hydrogen bonds for the kinetics of P680+. QA−. formation and P680+. Pheo−. recombination in photosystem II

1996 ◽  
Vol 1276 (1) ◽  
pp. 35-44 ◽  
Author(s):  
S. Vasil'ev ◽  
A. Bergmann ◽  
H. Redlin ◽  
H.-J. Eichler ◽  
G. Renger
Keyword(s):  
Photosystem Ii ◽  
Hydrogen Bonds ◽  
Exchangeable Hydrogen ◽  
Kinetics Of

Psb30 is a photosystem II reaction center subunit and is required for optimal growth in high light in Chlamydomonas reinhardtii

2011 ◽  
Vol 104 (1-2) ◽  
pp. 220-228 ◽  
Author(s):  
Natsuko Inoue-Kashino ◽  
Yasuhiro Kashino ◽  
Yuichiro Takahashi
Keyword(s):  
Photosystem Ii ◽  
Chlamydomonas Reinhardtii ◽  
Reaction Center ◽  
Optimal Growth ◽  
High Light

Environmental change provokes rapid macromolecular reallocations within the photosynthetic system in a static population of photobionts in the lichen Lobaria pulmonaria

2004 ◽  
Vol 36 (6) ◽  
pp. 425-433 ◽  
Author(s):  
Tyler D. B. MACKENZIE ◽  
Jeanette JOHNSON ◽  
Douglas A. CAMPBELL
Keyword(s):  
Photosystem Ii ◽  
Environmental Change ◽  
Seasonal Changes ◽  
Core Protein ◽  
Temperature Shift ◽  
High Light ◽  
Eastern Canada ◽  
Epiphytic Lichen ◽  
Lobaria Pulmonaria ◽  
Photosynthetic System

Lobaria pulmonaria is an epiphytic lichen that, in south-eastern Canada, inhabits deciduous forests where it must acclimate to large seasonal changes in temperature and in light caused by closing and opening of the leaf canopy. On a seasonal timescale, this acclimation occurs via large shifts in the macromolecular complexes of the photosynthetic system, within a photobiont population that shows no seasonal change in cell numbers. In this study, samples of L. pulmonaria were harvested in February and in May from a natural population near Sackville, New Brunswick, and subjected to two simulated intense seasonal changes: (1) early spring warming, simulated by a shift from high light at 5°C to high light at 16°C (February shift), and (2) late spring canopy closure, simulated by a shift from high light at 16°C to low light at 16°C (May shift). Thallus samples were collected daily throughout each week-long shift. There were no significant changes in photobiont cell population size or in the fraction of cells dividing during either shift. During the first day of the February temperature shift, there were, however, large changes in the pools of chlorophyll, the major light capture molecule in the photobionts, the PsbA (D1) core protein of photosystem II whose turnover is highly responsive to changing light and temperature, and the RbcL major subunit of the carbon-fixing RUBISCO enzyme whose levels correlate strongly with achieved photosynthesis in lichens. A static population of photobionts was therefore able to perform large and rapid macromolecular reallocations to cope with rapid environmental change. No significant changes were seen in the chlorophyll, photosystem II or RUBISCO pools across the May light shift, although seasonal-scale macromolecular reallocation does occur in response to decreased light in the summer.

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