Antagonistic Effects of Hydrogen Peroxide and Glutathione on Acclimation to Excess Excitation Energy in Arabidopsis

Karpińska, Barbara; Wingsle, Gunnar; Karpiński, Stanisław

doi:10.1080/15216540050176548

Cited by 65 publications

(3 citation statements)

References 31 publications

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“…APXa1 is located in the chloroplast thylakoid membrane in the leaves and APXa2 is located in the plastid matrix of various organs ( Figure 5 , Table 1 ); these are responsible for the removal of H 2 O 2 produced by the electron transport of the photosynthetic chain in the chloroplast and by other metabolic pathways in the plastid respectively. However, it has recently been suggested that the chloroplast is not as sensitive to ROS damage as previously thought [ 57 ]. We speculate that due to the special metabolic mechanism and structure in maize leaves, chloroplasts may not produce a large amount of ROS under stress.…”

Section: Discussionmentioning

confidence: 99%

Molecular Evolution of Maize Ascorbate Peroxidase Genes and Their Functional Divergence

Wang

Zhao

et al. 2020

Genes

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Ascorbate peroxidase (APX) is an important antioxidant enzyme. APXs in maize are encoded by multiple genes and exist as isoenzymes. The evolutionary history and functional divergence of the maize APX gene family were analyzed through comparative genomic and experimental data on the Internet in this paper. APX genes in higher plants were divided into classes A, B, and C. Each type of APX gene in angiosperms only had one ancestral gene that was duplicated along with the genome duplication or local (or tandem) duplication of the angiosperm. A total of eight genes were retained in maize and named APXa1, APXa2, APXa3, APXb1, APXb2, APXc1.1, APXc1.2, and APXc2. The APX genes of class A were located in the chloroplasts or mitochondria, and the class B and C genes were localized in the peroxisomes and cytoplasm, respectively. The expression patterns of eight APXs were different in vegetative and reproductive organs at different growth and development stages. APXa1 and APXb1 of maize may participate in the antioxidant metabolism of vegetative organs under normal conditions. APXa2, APXb2, APXc1.1, and APXc1.2 may be involved in the stress response, and APXb2 and APXc2 may participate in the senescence response. These results provide a basis for cultivating high-yield and resistant maize varieties.

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Section: Discussionmentioning

confidence: 99%

Molecular Evolution of Maize Ascorbate Peroxidase Genes and Their Functional Divergence

Wang

Zhao

et al. 2020

Genes

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“…Therefore, lowered GR activity could be explained by an increased NADPH consumption by the CEF (Munekage and Shikanai, 2005), which in turn may cause increased reduction of the PQ pool (Karpinska et al ., 2000). …”

Section: Discussionmentioning

confidence: 99%

Isochorismate synthase 1 is required for thylakoid organization, optimal plastoquinone redox status, and state transitions in Arabidopsis thaliana

Gawroński

Górecka

Bederska

et al. 2013

Journal of Experimental Botany

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Isochorismate synthase 1 (ICS1) is a crucial enzyme in the salicylic acid (SA) synthesis pathway, and thus it is important for immune defences. The ics1 mutant is used in experiments on plant–pathogen interactions, and ICS1 is required for the appropriate hypersensitive disease defence response. However, ICS1 also takes part in the synthesis of phylloquinone, which is incorporated into photosystem I and is an important component of photosynthetic electron transport in plants. Therefore, photosynthetic and molecular analysis of the ics1 mutant in comparison with wild-type and SA-degrading transgenic NahG Arabidopsis thaliana plants was performed. Photosynthetic parameters in the ics1 mutant, when compared with the wild type, were changed in a manner observed previously for state transition-impaired plants (STN7 kinase recessive mutant, stn7). In contrast to stn7, deregulation of the redox status of the plastoquinone pool (measured as 1–q p) in ics1 showed significant variation depending on the leaf age. SA-degrading transgenic NahG plants targeted to the cytoplasm or chloroplasts displayed normal (wild-type-like) state transition. However, ics1 plants treated with a phylloquinone precursor displayed symptoms of phenotypic reversion towards the wild type. ics1 also showed altered thylakoid structure with an increased number of stacked thylakoids per granum which indicates the role of ICS1 in regulation of state transition. The results presented here suggest the role of ICS1 in integration of the chloroplast ultrastructure, the redox status of the plastoquinone pool, and organization of the photosystems, which all are important for optimal immune defence and light acclimatory responses.

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“…However, those processes seem to converge and may result from hydropassive mechanisms (direct evaporation of water without metabolic involvement) [ 41 ] as well as morphological, physiological, and molecular metabolic-dependent mechanisms [ 42 ]. The latter comprises regulation of K + transport, expression and activity of aquaporins [ 43 ], the signaling of ROS [ 44 ], guard cell calcium status, membrane fluidity, and phototropin activation [ 45 ]. Most of these processes are under the control of hormones [ 46 ].…”

Section: Introductionmentioning

confidence: 99%

Thermal Analysis of Stomatal Response under Salinity and High Light

Orzechowska

Trtílek

Tokarz

et al. 2021

IJMS

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A non-destructive thermal imaging method was used to study the stomatal response of salt-treated Arabidopsis thaliana plants to excessive light. The plants were exposed to different levels of salt concentrations (0, 75, 150, and 220 mM NaCl). Time-dependent thermograms showed the changes in the temperature distribution over the lamina and provided new insights into the acute light-induced temporary response of Arabidopsis under short-term salinity. The initial response of plants, which was associated with stomatal aperture, revealed an exponential growth in temperature kinetics. Using a single-exponential function, we estimated the time constants of thermal courses of plants exposed to acute high light. The saline-induced impairment in stomatal movement caused the reduced stomatal conductance and transpiration rate. Limited transpiration of NaCl-treated plants resulted in an increased rosette temperature and decreased thermal time constants as compared to the controls. The net CO2 assimilation rate decreased for plants exposed to 220 mM NaCl; in the case of 75 mM NaCl treatment, an increase was observed. A significant decline in the maximal quantum yield of photosystem II under excessive light was noticeable for the control and NaCl-treated plants. This study provides evidence that thermal imaging as a highly sensitive technique may be useful for analyzing the stomatal aperture and movement under dynamic environmental conditions.

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Antagonistic Effects of Hydrogen Peroxide and Glutathione on Acclimation to Excess Excitation Energy in Arabidopsis

Cited by 65 publications

References 31 publications

Molecular Evolution of Maize Ascorbate Peroxidase Genes and Their Functional Divergence

Molecular Evolution of Maize Ascorbate Peroxidase Genes and Their Functional Divergence

Isochorismate synthase 1 is required for thylakoid organization, optimal plastoquinone redox status, and state transitions in Arabidopsis thaliana

Thermal Analysis of Stomatal Response under Salinity and High Light

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