Journal ArticleDOI
Dissociation of supramolecular complexes in chloroplast membranes. A manifestation of heat damage to the photosynthetic apparatus.
Paul A Armond,Paul A Armond,Olle Björkman,Olle Björkman,L. Andrew Staehelin,L. Andrew Staehelin +5 more
TLDR
Results demonstrate that the heat-induced damage to the photosynthetic apparatus involves not only a functional dissociation of the chlorophyll a/b light-harvesting complex from the photosystem Ii complex, but a physical dissociation as well.About:
This article is published in Biochimica et Biophysica Acta.The article was published on 1980-01-01. It has received 181 citations till now. The article focuses on the topics: Light-harvesting complexes of green plants & Chloroplast thylakoid.read more
Citations
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Journal ArticleDOI
Effects of moderate heat stress on photosynthesis: importance of thylakoid reactions, rubisco deactivation, reactive oxygen species, and thermotolerance provided by isoprene
TL;DR: In this article, it was shown that moderate heat stress can stimulate dark reduction of plastoquinone and cyclic electron flow in the light and increase thylakoid leakiness.
Journal ArticleDOI
Adaptation and Acclimation of Photosynthetic Microorganisms to Permanently Cold Environments
Rachael M. Morgan-Kiss,John C. Priscu,Tessa Pocock,Loreta Gudynaite-Savitch,Norman P. A. Huner +4 more
TL;DR: Differential adaptive and acclimative mechanisms exist in phototrophic microorganisms residing in low-temperature environments that are exposed to constant low-light environments versus high-light- and high-UV-exposed phototroph assemblages.
Journal ArticleDOI
Donor side capacity of Photosystem II probed by chlorophyll a fluorescence transients
TL;DR: Guisse et al. as mentioned in this paper showed that under various conditions, the appearance of the K-step and the following dip, as well as the lowered maximum fluorescence level (FM) attainable, can be explained by an imbalance between the electron flow leaving the RC to the acceptor side and the electron flux coming to the RC from the donor side, which leads to a stable oxidation of the secondary electron donor, the tyrosine Z (YZ), and possibly to the accumulation of P680+.
Journal ArticleDOI
Regulation of antenna structure and electron transport in Photosystem II of Pisum sativum under elevated temperature probed by the fast polyphasic chlorophyll a fluorescence transient: OKJIP
TL;DR: In this article, the effect of high temperature (above 40°C) on Chlorophyll a fluorescence rise kinetics starting from 40 μs (to 1 s) in pea leaves (Pisum sativum) was examined.
Journal ArticleDOI
Evaluation of Chlorophyll Content and Fluorescence Parameters as Indicators of Drought Tolerance in Barley
TL;DR: It was concluded that chlorophyll content, F(subscript o), F (subscript v)/F(sub script o), and F( Subscript v/F( subscript m) could be considered as reliable indicators in screening barley germplasm for drought tolerance.
References
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Journal ArticleDOI
Freeze-etching nomenclature.
Daniel Branton,S. Bullivant,Norton B. Gilula,Morris J. Karnovsky,H. Moor,K. Mühlethaler,D. H. Northcote,Lester Packer,Birgit Satir,Peter Satir,Volker Speth,L. A. Staehlin,Russell L. Steere,Ronald S. Weinstein +13 more
TL;DR: Results indicate that the host-versus-graft reaction alone can enihance murine cvtomtiegalovirus in a chronicallY injected host atid maY help explain the high incidence of cvvtomegalov virus infection seen after renal and other allograft transplantation.
Journal ArticleDOI
Heat-induced changes of chlorophyll fluorescence in intact leaves correlated with damage of the photosynthetic apparatus.
Ulrich Schreiber,Joseph A. Berry +1 more
TL;DR: Quantum yield measurements of CO2 fixation confirm that hight-light conditions protect from heat-damage and it is suggested that chlorophyll acts as an intrinsic fluorescence probe of the thylakoid membrane and responds to the same changes which cause irreversible denaturation of photosynthetic enzymes.
Journal ArticleDOI
Photosynthetic Acclimation to Temperature in the Desert Shrub, Larrea divaricata: II. Light-harvesting Efficiency and Electron Transport
TL;DR: The process of acclimation to high temperatures involves an enhancement of the stability of the interactions between the light-harvesting pigments and the photosystem reaction centers, which results in a decrease in the quantum yield of electron transport at limiting light intensity, followed by a loss of electrons transported at rate-saturating light intensity.
Journal ArticleDOI
Heat-induced changes of chlorophyll fluorescence in isolated chloroplasts and related heat-damage at the pigment level.
Ulrich Schreiber,Paul A. Armond +1 more
TL;DR: It is concluded that the block of Photosystem II reaction centers precedes the loss of the light-harvesting pigment protein complex, and the approximately antiparallel heat-induced Fmax decrease and Fo increase suggest a common cause for the two events.
Journal ArticleDOI
Spatial relationship of photosystem I, photosystem II, and the light-harvesting complex in chloroplast membranes.
TL;DR: It is demonstrated that the incompletely developed plastids have a smaller photosynthetic unit size; this is primarily due to the absence of a major light-harvesting pigment-protein complex which is present in the mature membranes.
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Heat-induced changes of chlorophyll fluorescence in intact leaves correlated with damage of the photosynthetic apparatus.
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