Document Detail


Towards elucidation of dynamic structural changes of plant thylakoid architecture.
MedLine Citation:
PMID:  23148278     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Long-term acclimation of shade versus sun plants modulates the composition, function and structural organization of the architecture of the thylakoid membrane network. Significantly, these changes in the macroscopic structural organization of shade and sun plant chloroplasts during long-term acclimation are also mimicked following rapid transitions in irradiance: reversible ultrastructural changes in the entire thylakoid membrane network increase the number of grana per chloroplast, but decrease the number of stacked thylakoids per granum in seconds to minutes in leaves. It is proposed that these dynamic changes depend on reversible macro-reorganization of some light-harvesting complex IIb and photosystem II supracomplexes within the plant thylakoid network owing to differential phosphorylation cycles and other biochemical changes known to ensure flexibility in photosynthetic function in vivo. Some lingering grana enigmas remain: elucidation of the mechanisms involved in the dynamic architecture of the thylakoid membrane network under fluctuating irradiance and its implications for function merit extensive further studies.
Authors:
Jan M Anderson; Peter Horton; Eun-Ha Kim; Wah Soon Chow
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Publication Detail:
Type:  Journal Article; Review    
Journal Detail:
Title:  Philosophical transactions of the Royal Society of London. Series B, Biological sciences     Volume:  367     ISSN:  1471-2970     ISO Abbreviation:  Philos. Trans. R. Soc. Lond., B, Biol. Sci.     Publication Date:  2012 Dec 
Date Detail:
Created Date:  2012-11-13     Completed Date:  2013-04-22     Revised Date:  2014-01-10    
Medline Journal Info:
Nlm Unique ID:  7503623     Medline TA:  Philos Trans R Soc Lond B Biol Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  3515-24     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Acclimatization
Arabidopsis / metabolism,  physiology,  radiation effects
Darkness
Light
Light-Harvesting Protein Complexes / metabolism
Organelle Size*
Photochemical Processes
Photosynthesis
Photosystem II Protein Complex / metabolism
Plant Leaves / metabolism,  physiology,  radiation effects*
Spinacia oleracea / metabolism,  physiology,  radiation effects
Thylakoids / metabolism,  physiology*,  radiation effects
Time Factors
Chemical
Reg. No./Substance:
0/Light-Harvesting Protein Complexes; 0/Photosystem II Protein Complex
Comments/Corrections

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