Prolonged dark period modulates the oxidative burst and enzymatic antioxidant systems in the leaves of salicylic acid-treated tomato

Poór, Péter; Takács, Zoltan; Bela, Krisztina; Czékus, Zalán; Szalai, Gabriella; Tari, Irma

doi:10.1016/j.jplph.2017.03.013

Cited by 32 publications

(44 citation statements)

References 62 publications

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“…The direct effects of SA on photosynthetic apparatus and the indirect effects on photosynthesis through the limitation of CO2 supply by regulating stomatal movements take an integral part of the plant immune responses and reduce pathogen invasion by decreasing the availability of photosynthates and by inducing hypersensitive reaction (HR) in the leaves (Muthamilarasan and Prasad 2013, Cheng et al 2016). Effects of SA seem to be different in light or dark conditions (Takács et al 2016, Poór et al 2017. Moreover, the accumulation of SA is the highest in the dark period of the day [~0.1 µg(total SA) g -1 (FM) in tomato leaves].…”

Section: Discussionmentioning

confidence: 99%

“…However, it can be concluded that the effect of SA depends on the applied concentration, on the duration and the mode of the application, on plant species, on developmental stage or on environmental conditions, such as the presence or quality of light (Hayat et al 2010, Rivas-San Vicente andPlasencia 2011). Although, it was observed that accumulation of SA and the initiation of SA-mediated signalling pathways after pathogen infection are also lightdependent (Chandra-Shekara et al 2006, Griebel and Zeier 2008, Goodspeed et al 2012, Karpiński et al 2013, Poór et al 2017, the effects of SA on the photosynthetic apparatus and on the efficiency of photosynthesis after a prolonged dark period remained mostly unclear. At the same time, the SA-mediated changes in photosynthetic performance can markedly influence the defence responses of plants after pathogen infection in the dark (Cheng et al 2016).…”

Section: Introductionmentioning

confidence: 99%

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Effects of salicylic acid on photosynthetic activity and chloroplast morphology under light and prolonged darkness

Poór¹,

Borbély²,

Bódi³

et al. 2019

Photosynt.

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Salicylic acid (SA) is a key component of plant defence, which exerts a concentration-dependent effect on photosynthesis under multi-faceted influence of light. Photosynthetic activities and chloroplast morphology were studied in tomato plants after treatment with a sublethal, 0.1 mM, and a cell death-inducing, 1 mM concentrations of SA under normal photoperiod during light phase and after a prolonged dark phase. SA (1 mM) decreased the maximal (Fv/Fm) and effective quantum yields of PSII [Y(II)] and PSI [Y(I)] under both environmental conditions, however, the photoprotective processes were not significantly different between light and dark samples. Decrease in grana height, thylakoid dilation and deformation of lumen were also observed in the light. In contrast to illuminated samples, 0.1 mM SA decreased Y(II) and Y(I) after dark incubation, but nonphotochemical energy dissipation and cyclic electron flow increased, suggesting that the photoprotective mechanisms could be activated in plants exposed to prolonged darkness. fluorescence yield in dark-adapted state; FM -fresh mass; Fv/Fm -maximum quantum yield of PSII; HR -hypersensitive response; LEF -linear electron flow; PN -net photosynthetic rate; qL -estimates the fraction of open PSII centres; qP -photochemical quenching; RC -reaction centres; ROSreactive oxygen species; SA -salicylic acid; TEM -transmission electron micrograph; Y(I) -effective quantum yield of PSI; Y(II)effective quantum yield of PSII; Y(CEF) -yield of cyclic electron flow around PSI; Y(NA) -the quantum yield of nonphotochemical energy dissipation in PSI due to acceptor side limitation; Y(ND) -quantum yield of nonphotochemical energy dissipation in PSI due to donor side limitation; Y(NO) -quantum yield of nonregulated nonphotochemical energy dissipation; Y(NPQ) -quantum yield of regulated nonphotochemical energy dissipation.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of salicylic acid on photosynthetic activity and chloroplast morphology under light and prolonged darkness

Poór¹,

Borbély²,

Bódi³

et al. 2019

Photosynt.

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“…However, total SOD activity in Solanum lycopersicum leaves is the highest at the end of day and decreases during the night (Kerdnaimongkol et al 1997). In addition, relative transcriptions of FeSOD and MnSOD also decrease in the early hours of the dark period in tomato leaves (Poór et al 2017). These data suggest that total SOD activity is determined by the various SOD isoenzymes which are regulated differently during the day.…”

Section: Circadian and Diurnal Regulation Of The Key Antioxidant Enzymesmentioning

confidence: 76%

“…Namely, the transcription of cAPX1 decreases after 16 h in the dark but it increases in the light (Pignocchi et al 2003). Earlier it was observed that the cAPX1 mRNA abundance increases during the day and decreases during the night in Arabidopsis (Kubo et al 1995) and in tomato leaves (Poór et al 2017). Similarly, the activity of APX as well as the relative transcription of chloroplastic and cytosolic APX is decreased during the night in Nicotiana sylvestris leaves (Dutilleul et al 2003).…”

Section: Circadian and Diurnal Regulation Of The Key Antioxidant Enzymesmentioning

confidence: 92%

“…Paraquat (1,1'-dimethyl-4,4'-bipyridinium dichloride) is an important non-selective herbicide, which can interact with photosystem I in the light via induction of superoxide free radical formation, thus causing lethal oxidative stress in plants. However, it was found that 100 M Paraquat does not change SOD activity in the first 12 h of the dark treatment in Salvia officinalis (Radyukina et al 2008). In contrast, some chemicals, such as the auxin-type herbicide Quinclorac (3,7-dichloro-8-quinoline-carboxylic acid), are selective for different plant species.…”

Section: Plant Stress Responses In the Darkmentioning

confidence: 98%

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Regulation of the key antioxidant enzymes by developmental processes and environmental stresses in the dark

Poór¹,

Ördög²,

Czékus³

et al. 2018

Biologia plant.

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The presence of solar radiation is one of the most important environmental factors, which is required for the optimal growth and development of plants. The absence of it (e.g. in the night period or artificially prolonged darkness) can alter the light-dependent signalling and regulation pathways and may induce new defence responses. Antioxidant enzymes as components of the plant defence system play a crucial role in the detoxification of reactive oxygen species (ROS) induced by several stressors; however, their regulation can be different in the light or in the dark. In this review we summarize the current knowledge about the physiological and molecular aspects of dark-modulated key antioxidant enzymes (superoxide dismutase, catalase, and ascorbate peroxidase) in different plant species and discuss their roles in different developmental processes (seedling growth and development or senescence) and in responses to environmental stresses (cold, chilling, heat, and biotic stress). Moreover, the hormonal regulation of respective gene transcription and the changes in activity of various isoenzymes at subcellular level are also summarized. Based on this knowledge, modification of these antioxidant enzymes may be used to increase the yield and stress tolerance of cultivated plants in the changing environment.Additional key words: ascorbate peroxidase, catalase, reactive oxygen species, superoxide dismutase. 

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Fusaric acid-evoked oxidative stress affects plant defence system by inducing biochemical changes at subcellular level

Iqbal,

Czékus,

Ördög

et al. 2023

Plant Cell Rep

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Fusaric acid (FA) is one of the most harmful phytotoxins produced in various plant–pathogen interactions. Fusarium species produce FA as a secondary metabolite, which can infect many agronomic crops at all stages of development from seed to fruit, and FA production can further compromise plant survival because of its phytotoxic effects. FA exposure in plant species adversely affects plant growth, development and crop yield. FA exposure in plants leads to the generation of reactive oxygen species (ROS), which cause cellular damage and ultimately cell death. Therefore, FA-induced ROS accumulation in plants has been a topic of interest for many researchers to understand the plant–pathogen interactions and plant defence responses. In this study, we reviewed the FA-mediated oxidative stress and ROS-induced defence responses of antioxidants, as well as hormonal signalling in plants. The effects of FA phytotoxicity on lipid peroxidation, physiological changes and ultrastructural changes at cellular and subcellular levels were reported. Additionally, DNA damage, cell death and adverse effects on photosynthesis have been explained. Some possible approaches to overcome the harmful effects of FA in plants were also discussed. It is concluded that FA-induced ROS affect the enzymatic and non-enzymatic antioxidant system regulated by phytohormones. The effects of FA are also associated with other photosynthetic, ultrastructural and genotoxic modifications in plants. Graphical abstract

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Prolonged dark period modulates the oxidative burst and enzymatic antioxidant systems in the leaves of salicylic acid-treated tomato

Cited by 32 publications

References 62 publications

Effects of salicylic acid on photosynthetic activity and chloroplast morphology under light and prolonged darkness

Effects of salicylic acid on photosynthetic activity and chloroplast morphology under light and prolonged darkness

Regulation of the key antioxidant enzymes by developmental processes and environmental stresses in the dark

Fusaric acid-evoked oxidative stress affects plant defence system by inducing biochemical changes at subcellular level

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