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פותח על ידי קלירמאש פתרונות בע"מ -
Irreversible disassembly of chiral macrodomains in thylakoids due to photoinhibition
Year:
1997
Source of publication :
Photosynthesis Research
Authors :
גוסקובסקי, יוג'ין
;
.
שחק, יוספה
;
.
Volume :
51
Co-Authors:

Barzda, V., Institute of Plant Biology, Hungarian Academy of Sciences, P.O.Box 521, H-6701 Szeged, Hungary

Garab, G., Institute of Plant Biology, Hungarian Academy of Sciences, P.O.Box 521, H-6701 Szeged, Hungary

Facilitators :
From page:
119
To page:
126
(
Total pages:
8
)
Abstract:
We investigated the effect of photoinhibitory illumination on the chiral macroorganization of the chromophores in spinach thylakoid membranes. By measuring circular dichroism (CD), we found that prolonged (15 min) illumination of membranes with intense white light led to irreversible diminishment of the main CD bands originating from the chiral macroorganization of the chromophores. The irreversible decrease of the main CD bands showed a nearly linear correlation with the extent of photoinhibition which was determined by chlorophyll fluorescence induction. CD measurements also revealed that the excitonic CD bands, which are given rise by short-range interactions between the chromophores inside the complexes or particles, were largely insensitive to the photoinhibitory illumination of the membranes. These data show that, whereas photoinhibitory treatment has no perceptible effect on the molecular architecture of the bulk of the pigment-protein complexes, it leads to a disorganization of their macroarray, and an irreversible disassembly of the chirally organized macrodomains.
Note:
Related Files :
Chiral macroorganization of chromophores
Chlorophyll fluorescence induction
circular dichroism
Photoinhibition of photosynthesis
Spinach thylakoids
עוד תגיות
תוכן קשור
More details
DOI :
10.1023/A:1005775720376
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
27487
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:31
You may also be interested in
Scientific Publication
Irreversible disassembly of chiral macrodomains in thylakoids due to photoinhibition
51

Barzda, V., Institute of Plant Biology, Hungarian Academy of Sciences, P.O.Box 521, H-6701 Szeged, Hungary

Garab, G., Institute of Plant Biology, Hungarian Academy of Sciences, P.O.Box 521, H-6701 Szeged, Hungary

Irreversible disassembly of chiral macrodomains in thylakoids due to photoinhibition
We investigated the effect of photoinhibitory illumination on the chiral macroorganization of the chromophores in spinach thylakoid membranes. By measuring circular dichroism (CD), we found that prolonged (15 min) illumination of membranes with intense white light led to irreversible diminishment of the main CD bands originating from the chiral macroorganization of the chromophores. The irreversible decrease of the main CD bands showed a nearly linear correlation with the extent of photoinhibition which was determined by chlorophyll fluorescence induction. CD measurements also revealed that the excitonic CD bands, which are given rise by short-range interactions between the chromophores inside the complexes or particles, were largely insensitive to the photoinhibitory illumination of the membranes. These data show that, whereas photoinhibitory treatment has no perceptible effect on the molecular architecture of the bulk of the pigment-protein complexes, it leads to a disorganization of their macroarray, and an irreversible disassembly of the chirally organized macrodomains.
Scientific Publication
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