scholarly journals The importance of chloroplast movement, nonphotochemical quenching, and electron transport rates in light acclimation and tolerance to high light in Arabidopsis thaliana

2019 ◽  
Vol 106 (11) ◽  
pp. 1444-1453 ◽  
Author(s):  
Mia M. Howard ◽  
Andrea Bae ◽  
Martina Königer
Keyword(s):  
Arabidopsis Thaliana ◽  
Electron Transport ◽  
Nonphotochemical Quenching ◽  
High Light ◽  
Light Acclimation ◽  
Chloroplast Movement ◽  
Electron Transport Rates

scholarly journals Dissecting and modeling zeaxanthin- and lutein-dependent nonphotochemical quenching in Arabidopsis thaliana

2017 ◽  
Vol 114 (33) ◽  
pp. E7009-E7017 ◽  
Author(s):  
Michelle Leuenberger ◽  
Jonathan M. Morris ◽  
Arnold M. Chan ◽  
Lauriebeth Leonelli ◽  
Krishna K. Niyogi ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Light Intensity ◽  
Vascular Plants ◽  
Single Photon ◽  
Photon Counting ◽  
Nonphotochemical Quenching ◽  
Light Acclimation ◽  
Single Photon Counting ◽  
Photosynthetic Organisms ◽  
Psbs Protein

Photosynthetic organisms use various photoprotective mechanisms to dissipate excess photoexcitation as heat in a process called nonphotochemical quenching (NPQ). Regulation of NPQ allows for a rapid response to changes in light intensity and in vascular plants, is primarily triggered by a pH gradient across the thylakoid membrane (∆pH). The response is mediated by the PsbS protein and various xanthophylls. Time-correlated single-photon counting (TCSPC) measurements were performed on Arabidopsis thaliana to quantify the dependence of the response of NPQ to changes in light intensity on the presence and accumulation of zeaxanthin and lutein. Measurements were performed on WT and mutant plants deficient in one or both of the xanthophylls as well as a transgenic line that accumulates lutein via an engineered lutein epoxide cycle. Changes in the response of NPQ to light acclimation in WT and mutant plants were observed between two successive light acclimation cycles, suggesting that the character of the rapid and reversible response of NPQ in fully dark-acclimated plants is substantially different from in conditions plants are likely to experience caused by changes in light intensity during daylight. Mathematical models of the response of zeaxanthin- and lutein-dependent reversible NPQ were constructed that accurately describe the observed differences between the light acclimation periods. Finally, the WT response of NPQ was reconstructed from isolated components present in mutant plants with a single common scaling factor, which enabled deconvolution of the relative contributions of zeaxanthin- and lutein-dependent NPQ.

scholarly journals The link between transcript regulation and de novo protein synthesis in the retrograde high light acclimation response of Arabidopsis thaliana

BMC Genomics ◽  
2014 ◽  
Vol 15 (1) ◽  
pp. 320 ◽  
Author(s):  
Marie-Luise Oelze ◽  
Meenakumari Muthuramalingam ◽  
Marc Vogel ◽  
Karl-Josef Dietz
Keyword(s):  
Arabidopsis Thaliana ◽  
Protein Synthesis ◽  
De Novo ◽  
High Light ◽  
Light Acclimation ◽  
Transcript Regulation ◽  
Acclimation Response ◽  
De Novo Protein Synthesis

scholarly journals Arabidopsis thaliana leaves with altered chloroplast numbers and chloroplast movement exhibit impaired adjustments to both low and high light

2008 ◽  
Vol 59 (9) ◽  
pp. 2285-2297 ◽  
Author(s):  
M. Koniger ◽  
J. A. Delamaide ◽  
E. D. Marlow ◽  
G. C. Harris
Keyword(s):  
Arabidopsis Thaliana ◽  
High Light ◽  
Chloroplast Movement

scholarly journals The influence of ascorbate on anthocyanin accumulation during high light acclimation in Arabidopsis thaliana: further evidence for redox control of anthocyanin synthesis

2011 ◽  
Vol 35 (2) ◽  
pp. 388-404 ◽  
Author(s):  
MIKE PAGE ◽  
NIGHAT SULTANA ◽  
KONRAD PASZKIEWICZ ◽  
HANNAH FLORANCE ◽  
NICHOLAS SMIRNOFF
Keyword(s):  
Arabidopsis Thaliana ◽  
High Light ◽  
Light Acclimation ◽  
Anthocyanin Synthesis ◽  
Anthocyanin Accumulation ◽  
Redox Control

scholarly journals High-light vs. low-light: Effect of light acclimation on photosystem II composition and organization in Arabidopsis thaliana

2013 ◽  
Vol 1827 (3) ◽  
pp. 411-419 ◽  
Author(s):  
Roman Kouřil ◽  
Emilie Wientjes ◽  
Jelle B. Bultema ◽  
Roberta Croce ◽  
Egbert J. Boekema
Keyword(s):  
Arabidopsis Thaliana ◽  
Photosystem Ii ◽  
High Light ◽  
Light Acclimation ◽  
Light Effect ◽  
Low Light ◽  
Effect Of Light

scholarly journals The Mitochondrial Respiratory Chain Maintains the Photosynthetic Electron Flow in Arabidopsis thaliana Leaves under High-Light Stress

2019 ◽  
Vol 61 (2) ◽  
pp. 283-295 ◽  
Author(s):  
Shoya Yamada ◽  
Hiroshi Ozaki ◽  
Ko Noguchi
Keyword(s):  
Arabidopsis Thaliana ◽  
Electron Transport ◽  
Respiratory Chain ◽  
Rate Constants ◽  
Electron Flow ◽  
Light Stress ◽  
Photosynthetic Electron Transport ◽  
Mitochondrial Respiratory Chain ◽  
High Light ◽  
Complex Iii

Abstract The plant respiratory chain includes the ATP-coupling cytochrome pathway (CP) and ATP-uncoupling alternative oxidase (AOX). Under high-light (HL) conditions, plants experience photoinhibition, leading to a damaged photosystem II (PSII). The respiratory chain is considered to affect PSII maintenance and photosynthetic electron transport under HL conditions. However, the underlying details remain unclear. In this study, we investigated the respiratory chain functions related to PSII maintenance and photosynthetic electron transport in plants exposed to HL stress. We measured the HL-induced decrease in the maximum quantum yield of PSII in the leaves of wild-type and AOX1a-knockout (aox1a) Arabidopsis thaliana plants in which CP was partially inhibited by a complex-III inhibitor. We also calculated PSII photodamage and repair rate constants. Both rate constants changed when CP was partially inhibited in aox1a plants, suggesting that the respiratory chain is related to both processes. Before HL stress, photosynthetic linear electron flow (LEF) decreased when CP was partially inhibited. After HL stress, aox1a in the presence of the CP inhibitor showed significantly decreased rates of LEF. The electron flow downstream from PSII and on the donor side of photosystem I may have been suppressed. The function of respiratory chain is required to maintain the optimal LEF as well as PSII maintenance especially under the HL stress.

scholarly journals Suppression of NDA-Type Alternative Mitochondrial NAD(P)H Dehydrogenases in Arabidopsis thaliana Modifies Growth and Metabolism, but not High Light Stimulation of Mitochondrial Electron Transport

2014 ◽  
Vol 55 (5) ◽  
pp. 881-896 ◽  
Author(s):  
Sabá V. Wallström ◽  
Igor Florez-Sarasa ◽  
Wagner L. Araújo ◽  
Matthew A. Escobar ◽  
Daniela A. Geisler ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Electron Transport ◽  
High Light ◽  
Light Stimulation ◽  
Stimulation Of

scholarly journals Loss of chloroplast protease SPPA function alters high light acclimation processes in Arabidopsis thaliana L. (Heynh.)

2009 ◽  
Vol 60 (6) ◽  
pp. 1715-1727 ◽  
Author(s):  
Carolyn M. Wetzel ◽  
Laura D. Harmacek ◽  
Lee H. Yuan ◽  
Judith L. M. Wopereis ◽  
Rhiannon Chubb ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
High Light ◽  
Light Acclimation

scholarly journals Mitochondrial AOX Supports Redox Balance of Photosynthetic Electron Transport, Primary Metabolite Balance, and Growth in Arabidopsis thaliana under High Light

2019 ◽  
Vol 20 (12) ◽  
pp. 3067 ◽  
Author(s):  
Zhenxiang Jiang ◽  
Chihiro K. A. Watanabe ◽  
Atsuko Miyagi ◽  
Maki Kawai-Yamada ◽  
Ichiro Terashima ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Electron Transport ◽  
Calvin Cycle ◽  
Photosynthetic Electron Transport ◽  
Tca Cycle ◽  
Mitochondrial Respiratory Chain ◽  
Redox Balance ◽  
High Light ◽  
Primary Metabolite ◽  
Physiological Importance

When leaves receive excess light energy, excess reductants accumulate in chloroplasts. It is suggested that some of the reductants are oxidized by the mitochondrial respiratory chain. Alternative oxidase (AOX), a non-energy conserving terminal oxidase, was upregulated in the photosynthetic mutant of Arabidopsis thaliana, pgr5, which accumulated reductants in chloroplast stroma. AOX is suggested to have an important role in dissipating reductants under high light (HL) conditions, but its physiological importance and underlying mechanisms are not yet known. Here, we compared wild-type (WT), pgr5, and a double mutant of AOX1a-knockout plant (aox1a) and pgr5 (aox1a/pgr5) grown under high- and low-light conditions, and conducted physiological analyses. The net assimilation rate (NAR) was lower in aox1a/pgr5 than that in the other genotypes at the early growth stage, while the leaf area ratio was higher in aox1a/pgr5. We assessed detailed mechanisms in relation to NAR. In aox1a/pgr5, photosystem II parameters decreased under HL, whereas respiratory O2 uptake rates increased. Some intermediates in the tricarboxylic acid (TCA) cycle and Calvin cycle decreased in aox1a/pgr5, whereas γ-aminobutyric acid (GABA) and N-rich amino acids increased in aox1a/pgr5. Under HL, AOX may have an important role in dissipating excess reductants to prevent the reduction of photosynthetic electron transport and imbalance in primary metabolite levels.

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