Properties of inactive Photosystem II centers

1993 ◽  
Vol 35 (3) ◽  
pp. 323-343 ◽  
Author(s):  
J�r�me Lavergne ◽  
Edlira Leci
Keyword(s):  
Photosystem Ii ◽  
Inactive Photosystem Ii

scholarly journals The role of inactive photosystem–II–mediated quenching in a last–ditch community defence against high light stress in vivo

2002 ◽  
Vol 357 (1426) ◽  
pp. 1441-1450 ◽  
Author(s):  
Wah Soon Chow ◽  
Hae–Youn Lee ◽  
Youn–Il Park ◽  
Yong–Mok Park ◽  
Yong–Nam Hong ◽  
...  
Keyword(s):  
Photosystem Ii ◽  
Light Stress ◽  
Extreme Environments ◽  
Photosynthetic Apparatus ◽  
Optimal Operation ◽  
Residual Fraction ◽  
Photosynthetic Membrane ◽  
Number Of Factors ◽  
Inactive Photosystem Ii

Photoinactivation of photosystem II (PSII), the light–induced loss of ability to evolve oxygen, is an inevitable event during normal photosynthesis, exacerbated by saturating light but counteracted by repair via new protein synthesis. The photoinactivation of PSII is dependent on the dosage of light: in the absence of repair, typically one PSII is photoinactivated per 10 7 photons, although the exact quantum yield of photoinactivation is modulated by a number of factors, and decreases as fewer active PSII targets are available. PSII complexes initially appear to be photoinactivated independently; however, when less than 30% functional PSII complexes remain, they seem to be protected by strongly dissipative PSII reaction centres in several plant species examined so far, a mechanism which we term ‘inactive PSII–mediated quenching‘. This mechanism appears to require a pH gradient across the photosynthetic membrane for its optimal operation. The residual fraction of functional PSII complexes may, in turn, aid in the recovery of photoinactivated PSII complexes when conditions become less severe. This mechanism may be important for the photosynthetic apparatus in extreme environments such as those experienced by over–wintering evergreen plants, desert plants exposed to drought and full sunlight and shade plants in sustained sunlight.

Inactive photosystem II centers: A resolution of discrepencies in photosystem II quantitation

1990 ◽  
Vol 23 (1) ◽  
pp. 101-104 ◽  
Author(s):  
Donald R. Ort ◽  
John Whitmarsh
Keyword(s):  
Photosystem Ii ◽  
Inactive Photosystem Ii

Light saturation curves show competence of the water splitting complex in inactive Photosystem II reaction centers

1991 ◽  
Vol 30 (2-3) ◽  
pp. 85-94 ◽  
Author(s):  
Ladislav Nedbal ◽  
Cynthia Gibas ◽  
John Whitmarsh
Keyword(s):  
Photosystem Ii ◽  
Water Splitting ◽  
Reaction Centers ◽  
Light Saturation ◽  
Inactive Photosystem Ii ◽  
Light Saturation Curves

Oxygen-Evolving System of Inactive Photosystem II Complexes in Chlorella

2004 ◽  
Vol 51 (5) ◽  
pp. 584-589
Author(s):  
Yu. K. Chemeris ◽  
N. S. Korolkov ◽  
N. Kh. Seifullina ◽  
A. B. Rubin
Keyword(s):  
Photosystem Ii ◽  
Evolving System ◽  
Oxygen Evolving System ◽  
Inactive Photosystem Ii ◽  
Oxygen Evolving

Light saturation response of inactive photosystem II reaction centers in spinach

1990 ◽  
Vol 25 (1) ◽  
pp. 39-48 ◽  
Author(s):  
Roger A. Chylla ◽  
John Whitmarsh
Keyword(s):  
Photosystem Ii ◽  
Reaction Centers ◽  
Light Saturation ◽  
Inactive Photosystem Ii

scholarly journals Inactive Photosystem II Complexes in Leaves

1989 ◽  
Vol 90 (2) ◽  
pp. 765-772 ◽  
Author(s):  
Roger A. Chylla ◽  
John Whitmarsh
Keyword(s):  
Photosystem Ii ◽  
Inactive Photosystem Ii

scholarly journals An AtypicalpsbAGene Encodes a Sentinel D1 Protein to Form a Physiologically Relevant Inactive Photosystem II Complex in Cyanobacteria

2014 ◽  
Vol 290 (6) ◽  
pp. 3764-3774 ◽  
Author(s):  
Kimberly M. Wegener ◽  
Aparna Nagarajan ◽  
Himadri B. Pakrasi
Keyword(s):  
Photosystem Ii ◽  
D1 Protein ◽  
Inactive Photosystem Ii
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