Coordination Between ROS Regulatory Systems and Other Pathways Under Heat Stress and Pathogen Attack

Suzuki, Nobuhiro; Katano, Kazuma

doi:10.3389/fpls.2018.00490

Cited by 108 publications

(76 citation statements)

References 65 publications

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“…Reactive oxygen species (ROS) are redox molecules mainly produced in aerobic organisms, with some of the most important being photosynthetic cells, in which ROS production needs to be continually regulated to prevent undesirable functional collateral damage. ROS, which are involved in signaling processes in subcellular compartments and cells, as well as in mechanisms of defense against biotic and abiotic stresses, are also essential for cell survival [1,2].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Subcellular ROS and NO Metabolism in Higher Plants: Multifunctional Signaling Molecules

et al. 2019

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Reactive oxygen species (ROS) and nitric oxide (NO) are produced in all aerobic life forms under both physiological and adverse conditions. Unregulated ROS/NO generation causes nitro-oxidative damage, which has a detrimental impact on the function of essential macromolecules. ROS/NO production is also involved in signaling processes as secondary messengers in plant cells under physiological conditions. ROS/NO generation takes place in different subcellular compartments including chloroplasts, mitochondria, peroxisomes, vacuoles, and a diverse range of plant membranes. This compartmentalization has been identified as an additional cellular strategy for regulating these molecules. This assessment of subcellular ROS/NO metabolisms includes the following processes: ROS/NO generation in different plant cell sites; ROS interactions with other signaling molecules, such as mitogen-activated protein kinases (MAPKs), phosphatase, calcium (Ca2+), and activator proteins; redox-sensitive genes regulated by the iron-responsive element/iron regulatory protein (IRE-IRP) system and iron regulatory transporter 1(IRT1); and ROS/NO crosstalk during signal transduction. All these processes highlight the complex relationship between ROS and NO metabolism which needs to be evaluated from a broad perspective.

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Section: Introductionmentioning

confidence: 99%

Assessment of Subcellular ROS and NO Metabolism in Higher Plants: Multifunctional Signaling Molecules

et al. 2019

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“…Directly or indirectly, partly via the polyamine cycle, they also take part in the stresssignalling pathways (Pál et al 2015), scavenging of ROS (Mostofa et al 2014) and, among others, stabilization of the photosynthetic apparatus (Hu et al 2014). ROS regulatory systems and other signalling mechanisms need to be strictly coordinated in plants depending on the different growth stages and tissues for the appropriate responses to heat stress (Suzuki and Katano 2018). Using mutants deficient in different signals has demonstrated the significance of various pathways such as ROS regulatory systems and hormone signalling including processes related to abscisic acid (ABA), or salicylic acid (SA), in the heat responses of Arabidopsis plants (Larkindale et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Factors playing role in heat acclimation processes in barley and oat plants

Darkó¹,

Khalil²,

Elsayed³

et al. 2019

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In the present study, the heat acclimation processes (growing at 30/27°C for 2 weeks) in spring and winter varieties of barley (Hordeum vulgare L., varieties 'Conchita' and 'Mv Initium') and oat (Avena sativa L., varieties 'Mv Pehely' and 'Mv Hópehely') were characterized. Temperature dependence of certain chlorophyll a fluorescence induction parameters indicated the efficiency of heat acclimation. Heat treatment induced the activity of glutathinone-S-transferase, but decreased the amounts of the major polyamines. A significant increase in cadaverine content was found in 'Conchita'. 1,3-diaminopropane contents after heat acclimation were lower in the oat and higher in the barley varieties than that in the control plants. Salicylic acid and para-hydroxybenzoic acid contents were also induced at elevated temperatures. Changes in abscisic acid differed in the two species. Results suggest that besides certain similarities, different strategies can be activated to avoid the damaging effects of high temperatures in barley and oat plants.

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“…Plants exposed to abiotic stresses or infected by pathogens rapidly accumulate ROS such as hydrogen peroxide (H 2 O 2 ), anion superoxide (O 2 − ) and hydroxyl radical (OH • ) (Suzuki & Katano, ). Therefore, a complex antioxidative system, which includes nonenzymatic and enzymatic mechanisms, is needed to counterbalance the accumulation of these ROS.…”

Section: Introductionmentioning

confidence: 99%

Defence responses in flag leaves and spikes of common wheat Triticum aestivum cultivars with contrasting levels of basal resistance to blast caused by Pyricularia oryzae

et al. 2019

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Wheat blast, caused by Pyricularia oryzae, can cause large yield losses in crops. This study aimed to investigate defence responses in flag leaves and spikes of wheat cultivars BR-18 (moderately resistant) and BRS-Guamirim (susceptible), which differ in their levels of basal resistance. In contrast to cultivar BRS-Guamirim, infected plants of cultivar BR-18 showed more pronounced increases in activities of b-1,3-glucanase and chitinase as well as higher concentrations of lignin-thioglycolic acid derivatives in the flag leaves and total soluble phenolics in the spikes. Polyphenoloxidase activity increased in both flag leaves and spikes in response to fungal infection, regardless of cultivar. Phenylalanine ammonialyase (PAL) activity increased in infected flag leaves of both cultivars, especially in BR-18. PAL activity was lower in spikes of infected compared to noninfected plants of both cultivars, although to a lesser extent in BR-18. Compared to BRS-Guamirim, the antioxidative system in both flag leaves and spikes of BR-18 was more efficient in removing reactive oxygen species, reducing cellular damage caused by fungal infection. The lower catalase and peroxidase activities, associated with high superoxide dismutase activity, in flag leaves and spikes of infected BR-18 culminated in a high hydrogen peroxide concentration. The increase in ascorbate peroxidase activity was higher in both flag leaves and spikes of infected plants of BR-18 than in infected BRS-Guamirim. It was concluded that wheat resistance to blast depended on the basal level of resistance of the cultivar, which was mainly associated with the activities of defence enzymes and a more effective antioxidative system.

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Coordination Between ROS Regulatory Systems and Other Pathways Under Heat Stress and Pathogen Attack

Cited by 108 publications

References 65 publications

Assessment of Subcellular ROS and NO Metabolism in Higher Plants: Multifunctional Signaling Molecules

Assessment of Subcellular ROS and NO Metabolism in Higher Plants: Multifunctional Signaling Molecules

Factors playing role in heat acclimation processes in barley and oat plants

Defence responses in flag leaves and spikes of common wheat Triticum aestivum cultivars with contrasting levels of basal resistance to blast caused by Pyricularia oryzae

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