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
Systemic Regulation of Leaf Anatomical Structure, Photosynthetic Performance and High-light Tolerance in Sorghum
TL;DR: It is suggested that leaf anatomical structure, photosynthetic capacity, and high-light tolerance in newly developed sorghum leaves were regulated by a systemic irradiance signal from mature leaves; and chloroplast ultrastructure only weakly influenced the development of photosynthetics capacity and high -light tolerance.
Journal ArticleDOI
Differential light responses of Mediterranean tree saplings: linking ecophysiology with regeneration niche in four co-occurring species
TL;DR: It is concluded that light availability is an important environmental factor defining the regeneration niche of Mediterranean woody species, with shade-tolerant plants benefiting the most from associations with nurse plants.
Journal ArticleDOI
Arabidopsis Plants Grown in the Field and Climate Chambers Significantly Differ in Leaf Morphology and Photosystem Components
Yogesh Mishra,Hanna Johansson Jänkänpää,Anett Z. Kiss,Christiane Funk,Wolfgang P. Schröder,Stefan Jansson +5 more
TL;DR: Compared to plants grown under field conditions, the "indoor plants" had larger leaves, modified leaf shapes and longer petioles, and their pigment composition significantly differed; indoor plants had reduced levels of xanthophyll pigments.
Journal ArticleDOI
Gradients in stomatal conductance, xylem sap ABA and bulk leaf ABA along canes of Vitis vinifera cv. Shiraz: molecular and physiological studies investigating their source
Christopher J. Soar,Christopher J. Soar,Jim Speirs,Jim Speirs,Suzanne M. Maffei,Brian Loveys,Brian Loveys +6 more
TL;DR: Gradients were observed in xylem sap ABA and in stomatal conductance along canes of Vitis vinifera L. cv.
Journal ArticleDOI
Effects of iron and light stress on the biochemical composition of Antarctic Phaeocystis sp. (Prymnesiophyceae). II. Pigment composition
TL;DR: A hypothesis is presented to explain the transformation of fucoxanthin into 19′‐hexanoyloxyfu Coxanthin and 19′-butanoy LH pigments, referring to their roles as a light‐harvesting pigment.
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.
Journal ArticleDOI
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.