Journal ArticleDOI
Photoprotection and Other Responses of Plants to High Light Stress
Barbara Demmig-Adams,William W. Adams +1 more
- Vol. 43, Iss: 1, pp 599-626
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TLDR
The Xanthophyll cycle and thermal energy dissipation were investigated in this paper. But the results of these experiments were limited to the case of light-capturing systems, where active oxygen was not formed in the Photochemical Apparatus.Abstract:
PHOTO PROTECTION 604 Prevention oj Excessive Light Absorption... 604 Removal of Excess Excitation Energy Directly within the Light-Capturing System ......... ...... . . ..... ..... . .... . ..... ...... .... . .. . .. . . ..... . . . ... ... . 604 Removal oj Active Oxygen Formed in the Photochemical Apparatus ........ . . .. . . . . . . 605 INACTIV A TIONiTURNOVER OF PS II 606 THE XANTHOPHYLL CYCLE AND THERMAL ENERGY DISSIPATION: A PHOTOPROTECTIVE RESPONSE 608 Characteristics oj the Xanthophyll Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . 608 Association Among the De-epoxidized State oj the Xanthophyll Cycle, Thermal Energy Dissipation. and Photoprotection .. .. . . . .. . . ...... .. .. ... ... 609 Operation of the Xanthophyll Cycle in the Field . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . .... . . . .. . . . . 611 CONCLUSIONS 618read more
Citations
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Journal ArticleDOI
Chlorophyll fluorescence—a practical guide
Kate Maxwell,Giles N. Johnson +1 more
TL;DR: An introduction for the novice into the methodology and applications of chlorophyll fluorescence is provided and a selection of examples are used to illustrate the types of information that fluorescence can provide.
Journal ArticleDOI
Photoinhibition of photosystem II : inactivation, protein damage and turnover
TL;DR: Various protective mechanisms and an efficient repair cycle of Photosystem II allow plants to survive light stress and probably allows for coordinated biodegradation and biosynthesis of the D1 protein.
Journal ArticleDOI
The role of active oxygen in the response of plants to water deficit and desiccation.
TL;DR: During normally-encountered degrees of water deficit the capacity of the antioxidant systems and their ability to respond to increased active oxygen generation may be sufficient to prevent overt expression of damage.
Journal ArticleDOI
PHOTOPROTECTION REVISITED: Genetic and Molecular Approaches
TL;DR: Several photoprotective mechanisms operating within chloroplasts of plants and green algae are summarized, especially with respect to thermal dissipation of excess absorbed light energy, alternative electron transport pathways, chloroplast antioxidant systems, and repair of photosystem II.
Book
The Ecology of Phytoplankton
TL;DR: Reynolds as discussed by the authors provides basic information on composition, morphology and physiology of the main phyletic groups represented in marine and freshwater systems and reviews recent advances in community ecology, developing an appreciation of assembly processes, co-existence and competition, disturbance and diversity.
References
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Journal ArticleDOI
Carotenoid enhancement and its role in maintaining blue-green algal (Microcystis aeruginosa) surface blooms1
TL;DR: It is concluded that enhanced cellular carotenoid synthesis increases light utilization in the low and middle regions of the photosynthetically active radiation (PAR) spectrum and provides protection from UV damage.
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Two components of onset and recovery during photoinhibition of Ulva rotundata.
TL;DR: Short-term transfers of shade-adapted clonal tissue of the marine macroalga Ulva rotundata Blid to higher irradiances led to photoinhibition of room-temperature chlorophyll fluorescence and O2 evolution, and the ratio of variable to maximum (Fv/Fm) and variable (FV) fluorescence, and quantum yield declined with increasing irradiance and duration of exposure.
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Light-dependent D1 protein synthesis and translocation is regulated by reaction center II. Reaction center II serves as an acceptor for the D1 precursor.
TL;DR: The light intensity-dependent synthesis of D1 protein is related to the availability of modified RCII which serves as an acceptor for pD1, and the shuttling of RCII between the two membrane domains may represent a control mechanism of thylakoid membrane protein synthesis.
Journal ArticleDOI
Effect of high light on the efficiency of photochemical energy conversion in a variety of lichen species with green and blue-green phycobionts.
TL;DR: Green algalLichens were able to recover from exposure to excessive PFDs when thalli were in either the hydrated or desiccated state during such an exposure, whereas in blue-green algal lichens the decrease in photochemical efficiency was reversible in thalli illuminated in the desiccate state but rather sustained subsequent to illumination of thalli in the Hydrated state.
Journal ArticleDOI
Chloroplast superoxide and hydrogen peroxide scavenging systems from pea leaves: seasonal variations.
David J. Gillham,Alan D. Dodge +1 more
TL;DR: Levels of chloroplast antioxidants and enzymes that scavenge oxygen racidals were followed in the leaves of pea plants grown under glasshouse conditions between April 1984 and May 1985, suggesting that light intensity may have an important influence on the level and activity of chloroplasts and oxygen radical scavenger enzymes.