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
Reads0
Chats0
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
More filters
Journal ArticleDOI
Contributions of diffusional limitation, photoinhibition and photorespiration to midday depression of photosynthesis in Arisaema heterophyllum in natural high light
TL;DR: The increased Rubisco content in sun leaves, which has been recognized as raising photosynthetic assimilation capacity, also contributes to increase in the capacity for photorespiration.
Journal ArticleDOI
Photosynthesis, chlorophyll fluorescence, inorganic ion and organic acid accumulations of sunflower in responses to salt and salt-alkaline mixed stress.
Jushan Liu,D. C. Shi +1 more
TL;DR: Sunflowers were treated with mixing proportions of NaCl, Na2SO4, NaHCO3, and Na2CO3. as discussed by the authors showed that the growth of sunflower decreased with increasing salinity.
Journal ArticleDOI
Morpho‐anatomical, physiological and biochemical adjustments in response to root zone salinity stress and high solar radiation in two Mediterranean evergreen shrubs, Myrtus communis and Pistacia lentiscus
Massimiliano Tattini,Damiano Remorini,Patrizia Pinelli,Giovanni Agati,Erica Saracini,Maria Laura Traversi,Rossano Massai +6 more
TL;DR: Salt- and light-induced changes in morpho-anatomical, physiological and biochemical traits were analysed in Myrtus communis and Pistacia lentiscus to explain their ecological distribution in the Mediterranean basin, and suggest a key antioxidant function of flavonoids in response to different stressful conditions.
Journal ArticleDOI
Adenine nucleotides and the xanthophyll cycle in leaves
Adam M. Gilmore,Olle Björkman +1 more
TL;DR: Coupled electron transport during inhibited CO2 fixation was not driven by a dithiothreitol-sensitive Mehler ascorbate-peroxidase reaction, which implies that, in nature, photophosphorylation may provide energy needed for ion-pumping and biosynthetic and repair processes, even under stress conditions that severely restrict or prevent photosynthetic gas exchange.
Journal ArticleDOI
Factors Associated with Depression of Photosynthetic Quantum Efficiency in Maize at Low Growth Temperature
TL;DR: It is indicated that zeaxanthin-related quenching of absorbed excitation energy at PSII is, quantitatively, the most important factor determining the depressed photosynthetic efficiency in 14[deg]C-grown plants.
References
More filters
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).
Journal ArticleDOI
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.