Characterization of salicylic acid-mediated modulation of the drought stress responses: Reactive oxygen species, proline, and redox state in Brassica napus

2019 ◽  
Vol 157 ◽  
pp. 1-10 ◽  
Author(s):  
Van Hien La ◽  
Bok-Rye Lee ◽  
Md. Tabibul Islam ◽  
Sang-Hyun Park ◽  
Ha-il Jung ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Salicylic Acid ◽  
Drought Stress ◽  
Brassica Napus ◽  
Stress Responses ◽  
Redox State ◽  
Reactive Oxygen ◽  
Oxygen Species

scholarly journals Effects of Salicylic Acid on the Metabolism of Mitochondrial Reactive Oxygen Species in Plants

Biomolecules ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 341 ◽  
Author(s):  
Péter Poór
Keyword(s):  
Oxidative Stress ◽  
Reactive Oxygen Species ◽  
Salicylic Acid ◽  
Stress Responses ◽  
Current Knowledge ◽  
Reactive Oxygen ◽  
Defense Responses ◽  
Full Detail ◽  
Oxygen Species ◽  
Cell Organelles

Different abiotic and biotic stresses lead to the production and accumulation of reactive oxygen species (ROS) in various cell organelles such as in mitochondria, resulting in oxidative stress, inducing defense responses or programmed cell death (PCD) in plants. In response to oxidative stress, cells activate various cytoprotective responses, enhancing the antioxidant system, increasing the activity of alternative oxidase and degrading the oxidized proteins. Oxidative stress responses are orchestrated by several phytohormones such as salicylic acid (SA). The biomolecule SA is a key regulator in mitochondria-mediated defense signaling and PCD, but the mode of its action is not known in full detail. In this review, the current knowledge on the multifaceted role of SA in mitochondrial ROS metabolism is summarized to gain a better understanding of SA-regulated processes at the subcellular level in plant defense responses.

Dynamic responses of photosynthesis and the antioxidant system during a drought and rehydration cycle in peanut plants

2016 ◽  
Vol 43 (4) ◽  
pp. 337 ◽  
Author(s):  
Ana Furlan ◽  
Eliana Bianucci ◽  
María del Carmen Tordable ◽  
Aleysia Kleinert ◽  
Alexander Valentine ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Drought Stress ◽  
Antioxidant System ◽  
Stress Responses ◽  
Reactive Oxygen ◽  
Dynamic Responses ◽  
Physiological Status ◽  
Plant Responses ◽  
Oxygen Species ◽  
Dynamic Regulation

Drought stress is one of the most important environmental factors that adversely affect the productivity and quality of crops. Most studies focus on elucidating plant responses to this stress but the reversibility of these effects is less known. The aim of this work was to evaluate whether drought-stressed peanut (Arachis hypogaea L.) plants were capable of recovering their metabolism upon rehydration, with a focus on their antioxidant system. Peanut plants in the flowering phase (30 days after sowing) were exposed to drought stress by withholding irrigation during 14 days and subsequent rehydration during 3 days. Under these conditions, physiological status indicators, reactive oxygen species production and antioxidant system activity were evaluated. Under drought stress, the stomatal conductance, photosynthetic quantum yield and 13C : 12C ratio of the peanut plants were negatively affected, and also they accumulated reactive oxygen species. The antioxidant system of peanut plants showed increases in superoxide dismutase-, ascorbate peroxidase- and glutathione reductase-specific activities, as well as the total ascorbate content. All of these responses were reversed upon rehydration at 3 days. The efficient and dynamic regulation of variables related to photosynthesis and the antioxidant system during a drought and rehydration cycle in peanut plants was demonstrated. It is suggested that the activation of the antioxidant system could mediate the signalling of drought stress responses that enable the plant to survive and recover completely within 3 days of rehydration.

Muscle characterization of reactive oxygen species in oral diseases

2014 ◽  
Vol 73 (2) ◽  
pp. 81-86 ◽  
Author(s):  
Yamba Carla Lara Pereira ◽  
Glauce Crivelaro do Nascimento ◽  
Daniela Mizusaki Iyomasa ◽  
Mamie Mizusaki Iyomasa
Keyword(s):  
Reactive Oxygen Species ◽  
Reactive Oxygen ◽  
Oxygen Species ◽  
Oral Diseases

scholarly journals OTUD1 deubiquitylase regulates NF-κB- and KEAP1-mediated inflammatory responses and reactive oxygen species-associated cell death pathways

2021 ◽  
Author(s):  
Daisuke Oikawa ◽  
Min Gi ◽  
Hidetaka Kosako ◽  
Kouhei Shimizu ◽  
Hirotaka Takahashi ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Cell Death ◽  
Stress Responses ◽  
Inflammatory Responses ◽  
Reactive Oxygen ◽  
Antioxidant Response ◽  
Oxygen Species ◽  
Ubiquitin Chain ◽  
Intrinsically Disordered ◽  
Cell Death Pathways

Deubiquitylating enzymes (DUBs) regulate numerous cellular functions by removing ubiquitin modifications. We examined the effects of 88 human DUBs on linear ubiquitin chain assembly complex (LUBAC)-induced NF-κB activation, and identified OTUD1 as a potent suppressor. OTUD1 regulates the canonical NF-κB pathway by hydrolysing K63-linked ubiquitin chains from NF-κB signalling factors, including LUBAC. OTUD1 negatively regulates the canonical NF-κB activation, apoptosis, and necroptosis, whereas OTUD1 upregulates the interferon (IFN) antiviral pathway. The N-terminal intrinsically disordered region of OTUD1, which contains an EGTE motif, is indispensable for KEAP1-binding and NF-κB suppression. OTUD1 is involved in the KEAP1-mediated antioxidant response and reactive oxygen species (ROS)-induced cell death, oxeiptosis. In Otud1-/--mice, inflammation, oxidative damage, and cell death were enhanced in inflammatory bowel disease, acute hepatitis, and sepsis models. Thus, OTUD1 is a crucial regulator for the inflammatory, innate immune, and oxidative stress responses and ROS-associated cell death pathways.

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