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
Scaling sun and shade photosynthetic acclimation of Alocasia macrorrhiza to whole‐plant performance – II. Simulation of carbon balance and growth at different photon flux densities
TL;DR: Overall, RGR was most sensitive to LAR and showed relatively little sensitivity to variation in Amax or maintenance respiration, and was relatively insensitive to increases in leaf life-span beyond those observed.
Journal ArticleDOI
Integrated physiologic, proteomic, and metabolomic analyses of Malus halliana adaptation to saline–alkali stress
Xu-mei Jia,Yan-fang Zhu,Ya Hu,Rui Zhang,Li Cheng,Zu-lei Zhu,Tong Zhao,Xiayi Zhang,Yanxiu Wang +8 more
TL;DR: This study provides an important starting point for improving saline–alkali tolerance in M. halliana via genetic engineering by analyzing the plant pathways involved in the stress response of the plant and its regulatory mechanisms.
Journal ArticleDOI
Shedding some light on cold acclimation, cold adaptation, and phenotypic plasticity
Norman P. A. Huner,Rainer Bode,Keshav Dahal,Florian A. Busch,Marc Possmayer,Beth Szyszka,Dominic Rosso,Ingo Ensminger,Marianna Krol,Alexander G. Ivanov,Denis P. Maxwell +10 more
TL;DR: Research is summarized illustrating that photoautrophs as diverse as cyanobacteria, green algae, crop plants, and conifers tailor the structure and function of the photosynthetic apparatus to changes in temperature and irradiance to maintain cellular energy balance called photostasis.
Journal ArticleDOI
Role of the Reversible Xanthophyll Cycle in the Photosystem II Damage and Repair Cycle in Dunaliella salina
TL;DR: A role for Z is suggested in the protection of photodamaged and disassembled PSII reaction centers, apparently needed while PSII is in the process of degradation and replacement of the D1/32-kD reaction center protein.
Journal ArticleDOI
De-epoxidation of Violaxanthin after Reconstitution into Different Carotenoid Binding Sites of Light-harvesting Complex II
TL;DR: The in vitro de-epoxidation reaction was investigated in an in vitro system using reconstituted light-harvesting complex II (LHCII) and a thylakoid raw extract enriched in the enzyme Vx de-Epoxidase, indicating that LHCII and VxDe-ep oxidase stayed in close contact during the de-EPoxidation reactions and that no release of carotenoids occurred.
References
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Journal ArticleDOI
The relationship between the quantum yield of photosynthetic electron transport and quenching of chlorophyll fluorescence
TL;DR: In this article, the quantum yield of non-cyclic electron transport was found to be directly proportional to the product of the photochemical fluorescence quenching (qQ) and the efficiency of excitation capture by open Photosystem II (PS II) reaction centres (Fv/Fm).
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Photon yield of O2 evolution and chlorophyll fluorescence characteristics at 77 K among vascular plants of diverse origins.
Olle Björkman,Barbara Demmig +1 more
TL;DR: Determinations of the photon yield of O2 evolution and the Fv/FM, 692 ratio can serve as excellent quantitative measures of photoinhibition of overall photosynthetic energy-conversion system and of photochemistry of photosystem II, respectively.
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Plant Responses to Multiple Environmental FactorsPhysiological ecology provides tools for studying how interacting environmental resources control plant growth
TL;DR: Plant growth in diverse environments requires a similar balance of resources-energy, water, and mineral nutrients-to maintain optimal growth, but these resources differ by at least two orders of magnitude in the availability.
Journal ArticleDOI
Comparison of the effect of excessive light on chlorophyll fluorescence (77K) and photon yield of O2 evolution in leaves of higher plants.
Barbara Demmig,Olle Björkman +1 more
TL;DR: It is proposed that high-light treatments can have at least two different, concurrent effects on 77K fluorescence in leaves, one results from damage to the photosystem II (PSII) reaction-center complex and leads to a rise in FO, 692; the other results from an increased non-radiative energy dissipation in the pigment bed.
Photoinhibition and zeaxanthin formation in intact leaves. A possible role of the xanthophyll cycle in the dissipation of excess light energy. [Populus balsamifera; Hedera; helix; Monstrosa deliciosa]
TL;DR: Comparative studies of chlorophyll a fluorescence and of the pigment composition of leaves suggest a specific role of zeaxanthin, a carotenoid formed in the xanthophyll cycle, in protecting the photosynthetic apparatus against the adverse effects of excessive light.