Parallel Changes in H2O2 and Catalase during Thermotolerance Induced by Salicylic Acid or Heat Acclimation in Mustard Seedlings1

Dat, James F.; López-Delgado, Humberto A.; Foyer, Christine H.; Scott, Ian M.

doi:10.1104/pp.116.4.1351

Cited by 544 publications

(286 citation statements)

References 60 publications

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“…The H 2 O 2 levels increased minimally during the 3 weeks of experimentation, and tissue levels of H 2 O 2 were not affected by salinity and B treatments. Similar results were reported by Anderson (2002) for hot pepper leaves under salinity stress, and by Dat et al (1998), who found that mustard and pepper leaves under heat stress had elevated. SOD activity, responsible for the elimination of superoxide radicals in cells, however, in our study the activity decreased at 6 dS/m and 30 mg B/kg, but remained higher than the control treatment, 0 dS/m and 30 mg B/kg (Figure 1c).…”

Section: Resultssupporting

confidence: 77%

Hot pepper response to interactive effects of salinity and boron

Supanjani¹,

Lee²

2006

Plant Soil Environ.

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An excess of salinity and boron (B) can limit production of hot pepper (Capsicum annuum L.), but little is known about the physiological responses, including antioxidant activities, in response to these excesses. We investigated the physiological responses and defense mechanisms of hot pepper grown under salinity (NaCl) stress at 3 and 6 dS/mand B stress at 15 and 30 mg/kg. Dry weight and the total chlorophyll content decreased with increasing salinity and B levels. The toxic effect of B was greater under saline conditions. Higher levels of salinity and B resulted in increased B concentrations in leaves. The stomatal resistance values increased as the combined levels of salinity and B increased. Furthermore, increasing salinity, B or both increased activities of H 2 O 2 , SOD, POX, APX and GR, which increased oxidative stress, compared to the control plants. Increases in combined salinity and B levels disrupted plant nutrient balance and water use, and induced production of secondary toxic substances leading to an increased plant tissue concentration of H 2 O 2 , and suppression of growth in hot pepper.

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Section: Resultssupporting

confidence: 77%

Hot pepper response to interactive effects of salinity and boron

Supanjani¹,

Lee²

2006

Plant Soil Environ.

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“…HS per se caused a gradual POX activation between 1-7 days in non-infected plants ( Figure 5). This is in accordance with previous reports, where antioxidative enzymes (Almeselmani et al 2006;Reddy et al 2009) and H 2 O 2 (ROS) (Dat et al 1998;Larkindale & Huang 2005;Kotak et al 2007) participated in the conferring of plant thermotolerance and thermoprotection. However, in the later phases after HS, the combined stress of HS and infection was needed for a more pronounced POX activity increase ( Figure 5).…”

Section: Discussionsupporting

confidence: 82%

Effect of heat-shock pre-treatment on tomato plants infected by powdery mildew fungus

Nožková¹,

Mieslerová²,

Luhová³

et al. 2019

Plant Prot. Sci.

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Citation: Nožková V., Mieslerová B., Luhová L., Piterková J., Novák O., Špundová M., Lebeda A. (2019): Effect of heat-shock pre-treatment on tomato plants infected by powdery mildew fungus. Plant Protect. Sci., 55: 31-42. Abstract:The effect of plant heat-shock (HS) pre-treatment (40.5°C, 2 h) on Pseudoidium neolycopersici development in the susceptible and moderately resistant Solanum spp. genotypes was studied together with biochemical responses (endogenous concentrations of salicylic (SA), jasmonic (JA), abscisic acid (ABA), and peroxidase (POX) activity). In HS pre-treated S. lycopersicum, an acceleration of pathogen, chlorosis and necrosis development, strong SA, JA accumulation, and increased POX activity were detected. In S. chmielewskii, HS pre-treatment caused a slight suppression of pathogen development, increase in JA, ABA concentrations, and POX activity. HS accelerated and strengthened the development of symptoms and biochemical responses to the infection in the susceptible genotype in contrast to moderately resistant genotype with a robust defence response to an infection per se.

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“…Reported total foliar concentrations of H # O # (100-300 µM) (Rao et al, 1997 ;Dat et al, 1998) often exceed those required to inhibit photosynthesis in isolated chloroplasts through oxidation of the thiol-regulated enzymes (Kaiser, 1979 ;Charles & Halliwell, 1980). The chloroplastic H # O # concentration is maintained much lower than these total tissue levels (Polle, 1997), principally by chloroplastic APX.…”

Section: The Thioredoxin Systemmentioning

confidence: 99%

“…There is controversy over whether catalase has an important role in the hypersensitive response and systemic acquired resistance that can follow pathogen attack (Chen et al, 1993 ;Rao et al, 1997 ;Dat et al, 1998). In maize seedlings, which have higher photorespiratory rates than mature plants ( De Veau & Burris, 1989), enhanced catalase transcripts, protein and activities were associated with decreased chilling-induced oxidative damage (Prasad, 1996).…”

Section: Catalase and Non-photorespiratory H # O # Generationmentioning

confidence: 99%

Tansley Review No. 112

2000

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I. INTRODUCTION 360 II. PHOTOINHIBITION AND ACTIVE OXYGEN 360 III. OXYGEN AS AN ELECTRON ACCEPTOR 362 1. Oxygen‘poises’electron transport and carbon assimilation 362 2. The role of oxygen in ATP synthesis 364 3. How fast is O2reduction at PSI? 364 4. Chloroplastic processing of H2O2 366 IV. REDOX REGULATION OF PHOTOSYNTHETIC METABOLISM 368 1. The thioredoxin system 368 2. Manipulating the expression of thiol‐regulated enzymes 369 3. Modifying sensitivity to thiol regulation 369 V. PHOTORESPIRATION 369 1. The pathway and its genetic manipulation 369 2. Engineering plants that photorespire less? 371 3. Is photorespiration important in energy dissipation? 372 4. Production and processing of photorespiratory H2O2 373 5. Catalase and foliar H2O2levels 374 6. Catalase and non‐photorespiratory H2O2generation 375 VI. RESPIRATION 376 1. ‘Photosynthetic’respiration 376 2. AOS in the mitochondrion 376 3. AOX: regulation and significance to photosynthesis 377 VII. PHOTOSYNTHESIS AND REDOX SIGNAL TRANSDUCTION 378 1. The need for sensors, signals and transducers 378 2. Signal transduction at the local level 378 3. Remote signalling and responses leading to acclimation of photosynthesis? 379 4. Interactions between AOS, NO., and antioxidants 380 VIII. CONCLUSIONS 380 Acknowledgements 381 References 381 The gradual but huge increase in atmospheric O2 concentration that followed the evolution of oxygenic photosynthesis is one consequence that marks this event as one of the most significant in the earth's history. The high redox potential of the O2/water couple makes it an extremely powerful electron sink that enables energy to be transduced in respiration. In addition to the tetravalent interconversion of O2 and water, there exist a plethora of reactions that involve the partial reduction of O2 or photodynamic energy transfer to produce active oxygen species (AOS). All these redox reactions have become integrated during evolution into the aerobic photosynthetic cell. This review considers photosynthesis as a whole‐cell process, in which O2 and AOS are involved in reactions at both photosystems, enzyme regulation in the chloroplast stroma, photorespiration, and mitochondrial electron transport in the light. In addition, oxidants and antioxidants are discussed as metabolic indicators of redox status, acting as sensors and signal molecules leading to acclimatory responses. Our aim throughout is to assess the insights gained from the application of mutagenesis and transformation techniques to studies of the role of O2 and related redox components in the integrated regulation of photosynthesis.

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Parallel Changes in H2O2 and Catalase during Thermotolerance Induced by Salicylic Acid or Heat Acclimation in Mustard Seedlings1

Cited by 544 publications

References 60 publications

Hot pepper response to interactive effects of salinity and boron

Hot pepper response to interactive effects of salinity and boron

Effect of heat-shock pre-treatment on tomato plants infected by powdery mildew fungus

Tansley Review No. 112

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