Towards elucidation of dynamic structural changes of plant thylakoid architecture

Date

2012

Authors

Anderson, Jan
Horton, Peter
Kim, Eun-Ha
Chow, Wah S (Fred)

Journal Title

Journal ISSN

Volume Title

Publisher

Royal Society of London

Abstract

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.

Description

Keywords

Keywords: acclimation; adaptation; chloroplast; heterogeneity; irradiance; photosynthesis; phytochemistry; shade tolerance; ultrastructure; acclimatization; Arabidopsis; darkness; light; light harvesting system; metabolism; organelle size; photochemistry; photosynt Dynamic structure; Fluctuating irradiance; Grana; Lateral heterogeneity; Plant thylakoid architecture; Thylakoid protein complexes

Citation

Source

Philosophical Transactions of the Royal Society of London Series B

Type

Journal article

Book Title

Entity type

Access Statement

License Rights

DOI

10.1098/rstb.2012.0373

Restricted until

2037-12-31