Abstract
Inhibition of the activity of photosystem II (PSII) under strong light is referred to as photoinhibition. This phenomenon is due to an imbalance between the rate of photodamage to PSII and the rate of the repair of damaged PSII. In the "classical" scheme for the mechanism of photoinhibition, strong light induces the production of reactive oxygen species (ROS), which directly inactivate the photochemical reaction center of PSII. By contrast, in a new scheme, we propose that photodamage is initiated by the direct effect of light on the oxygen-evolving complex and that ROS inhibit the repair of photodamaged PSII by suppressing primarily the synthesis of proteins de novo. The activity of PSII is restricted by a variety of environmental stresses. The effects of environmental stress on damage to and repair of PSII can be examined separately and it appears that environmental stresses, with the exception of strong light, act primarily by inhibiting the repair of PSII. Studies have demonstrated that repair-inhibitory stresses include CO2 limitation, moderate heat, high concentrations of NaCl, and low temperature, each of which suppresses the synthesis of proteins de novo, which is required for the repair of PSII. We postulate that most types of environmental stress inhibit the fixation of CO2 with the resultant generation of ROS, which, in turn, inhibit protein synthesis.
| Original language | English |
|---|---|
| Pages (from-to) | 414-421 |
| Number of pages | 8 |
| Journal | Biochimica et Biophysica Acta - Bioenergetics |
| Volume | 1767 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Jun 1 2007 |
| Externally published | Yes |
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Keywords
- Environmental stress
- Photodamage
- Photoinhibition
- Photosystem II
- Protein synthesis
- Repair
ASJC Scopus subject areas
- Biophysics
- Biochemistry
- Cell Biology
Cite this
Photoinhibition of photosystem II under environmental stress. / Murata, Norio; Takahashi, Shunichi; Nishiyama, Yoshitaka; Allakhverdiev, Suleyman.
In: Biochimica et Biophysica Acta - Bioenergetics, Vol. 1767, No. 6, 01.06.2007, p. 414-421.Research output: Contribution to journal › Review article
}
TY - JOUR
T1 - Photoinhibition of photosystem II under environmental stress
AU - Murata, Norio
AU - Takahashi, Shunichi
AU - Nishiyama, Yoshitaka
AU - Allakhverdiev, Suleyman
PY - 2007/6/1
Y1 - 2007/6/1
N2 - Inhibition of the activity of photosystem II (PSII) under strong light is referred to as photoinhibition. This phenomenon is due to an imbalance between the rate of photodamage to PSII and the rate of the repair of damaged PSII. In the "classical" scheme for the mechanism of photoinhibition, strong light induces the production of reactive oxygen species (ROS), which directly inactivate the photochemical reaction center of PSII. By contrast, in a new scheme, we propose that photodamage is initiated by the direct effect of light on the oxygen-evolving complex and that ROS inhibit the repair of photodamaged PSII by suppressing primarily the synthesis of proteins de novo. The activity of PSII is restricted by a variety of environmental stresses. The effects of environmental stress on damage to and repair of PSII can be examined separately and it appears that environmental stresses, with the exception of strong light, act primarily by inhibiting the repair of PSII. Studies have demonstrated that repair-inhibitory stresses include CO2 limitation, moderate heat, high concentrations of NaCl, and low temperature, each of which suppresses the synthesis of proteins de novo, which is required for the repair of PSII. We postulate that most types of environmental stress inhibit the fixation of CO2 with the resultant generation of ROS, which, in turn, inhibit protein synthesis.
AB - Inhibition of the activity of photosystem II (PSII) under strong light is referred to as photoinhibition. This phenomenon is due to an imbalance between the rate of photodamage to PSII and the rate of the repair of damaged PSII. In the "classical" scheme for the mechanism of photoinhibition, strong light induces the production of reactive oxygen species (ROS), which directly inactivate the photochemical reaction center of PSII. By contrast, in a new scheme, we propose that photodamage is initiated by the direct effect of light on the oxygen-evolving complex and that ROS inhibit the repair of photodamaged PSII by suppressing primarily the synthesis of proteins de novo. The activity of PSII is restricted by a variety of environmental stresses. The effects of environmental stress on damage to and repair of PSII can be examined separately and it appears that environmental stresses, with the exception of strong light, act primarily by inhibiting the repair of PSII. Studies have demonstrated that repair-inhibitory stresses include CO2 limitation, moderate heat, high concentrations of NaCl, and low temperature, each of which suppresses the synthesis of proteins de novo, which is required for the repair of PSII. We postulate that most types of environmental stress inhibit the fixation of CO2 with the resultant generation of ROS, which, in turn, inhibit protein synthesis.
KW - Environmental stress
KW - Photodamage
KW - Photoinhibition
KW - Photosystem II
KW - Protein synthesis
KW - Repair
UR - http://www.scopus.com/inward/record.url?scp=34249787332&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34249787332&partnerID=8YFLogxK
U2 - 10.1016/j.bbabio.2006.11.019
DO - 10.1016/j.bbabio.2006.11.019
M3 - Review article
VL - 1767
SP - 414
EP - 421
JO - Biochimica et Biophysica Acta - Bioenergetics
JF - Biochimica et Biophysica Acta - Bioenergetics
SN - 0005-2728
IS - 6
ER -