The State of Photosystem I Complexes in the Central Regions of Pea Granal Thylakoids

The State of Photosystem I Complexes in the Central Regions of Pea Granal Thylakoids Grana-core and grana-margin fragments were obtained from pea (Pisum sativum L.) thylakoids, and both fractions contained photosystem I (PSI) complexes. The yield of these fractions exhibited variations for the plants grown during various periods of the summer season. Low-temperature fluorescence spectra, excitation spectra of long-wave fluorescence, and P700 kinetic characteristics were recorded for these fractions. PSI complexes in central granal regions were associated with PSII and the light-harvesting complexes of PSII, which followed from the excitation spectra of long-wave fluorescence and the kinetic characteristics of P700 light oxidation and dark reduction. The characteristics of the margin regions were changed depending on the fraction yield. If the yield was low, marginal fragments contained mainly PSI complexes. When the yield increased, PSI associates with PSII appeared. A spatial distribution and state of PSI complexes in granal thylakoids are discussed as related to the size and composition of the light-harvesting antenna. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Plant Physiology Springer Journals

The State of Photosystem I Complexes in the Central Regions of Pea Granal Thylakoids

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Publisher
Kluwer Academic Publishers-Plenum Publishers
Copyright
Copyright © 2003 by MAIK “Nauka/Interperiodica”
Subject
Life Sciences; Plant Sciences
ISSN
1021-4437
eISSN
1608-3407
D.O.I.
10.1023/A:1023849515467
Publisher site
See Article on Publisher Site

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