Specificity and dynamics of H2O2 detoxification by the cytosolic redox regulatory network as revealed by in vitro reconstitution

Vogelsang, Lara; Eirich, Jürgen; Finkemeier, Iris; Dietz, Karl-Josef

doi:10.1016/j.redox.2024.103141

Cited by 1 publication

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“…Moreover, reducing power can be transferred to peroxiredoxins (PRXs) and glutathione peroxidases (GPX), which detoxify peroxides, including H 2 O 2 and hydroperoxides (Rouhier and Jacquot, 2002;Hasanuzzaman et al, 2020;Vogelsang and Dietz, 2023;Vogelsang et al, 2024) (Figure 1). GPXs function as TRX-dependent thiol peroxidases, and PRX and GPX establish an ascorbate-independent waterwater cycle (Dietz et al, 2006;Casatejada et al, 2023).…”

Section: The Roles Of Fdx Trx Ntrc Prx and Gpx In Alternative Electro...mentioning

confidence: 99%

Alternative electron sinks in chloroplasts and mitochondria of halophytes as a safety valve for controlling ROS production during salinity

Demircan,

Sonmez,

Akyol

et al. 2024

Physiologia Plantarum

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Electron flow through the electron transport chain (ETC) is essential for oxidative phosphorylation in mitochondria and photosynthesis in chloroplasts. Electron fluxes depend on environmental parameters, e.g., ionic and osmotic conditions and endogenous factors, and this may cause severe imbalances. Plants have evolved alternative sinks to balance the reductive load on the electron transport chains in order to avoid overreduction, generation of reactive oxygen species (ROS), and to cope with environmental stresses. These sinks act primarily as valves for electron drainage and secondarily as regulators of tolerance‐related metabolism, utilizing the excess reductive energy. High salinity is an environmental stressor that stimulates the generation of ROS and oxidative stress, which affects growth and development by disrupting the redox homeostasis of plants. While glycophytic plants are sensitive to high salinity, halophytic plants tolerate, grow, and reproduce at high salinity. Various studies have examined the ETC systems of glycophytic plants, however, information about the state and regulation of ETCs in halophytes under non‐saline and saline conditions is scarce. This review focuses on alternative electron sinks in chloroplasts and mitochondria of halophytic plants. In cases where information on halophytes is lacking, we examined the available knowledge on the relationship between alternative sinks and gradual salinity resilience of glycophytes. To this end, transcriptional responses of involved components of photosynthetic and respiratory ETCs were compared between the glycophyte Arabidopsis thaliana and the halophyte Schrenkiella parvula, and the time‐courses of these transcripts were examined in A. thaliana. The observed regulatory patterns are discussed in the context of reactive molecular species formation in halophytes and glycophytes.

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Section: The Roles Of Fdx Trx Ntrc Prx and Gpx In Alternative Electro...mentioning

confidence: 99%

Alternative electron sinks in chloroplasts and mitochondria of halophytes as a safety valve for controlling ROS production during salinity

Demircan,

Sonmez,

Akyol

et al. 2024

Physiologia Plantarum

Self Cite

View full text Add to dashboard Cite

show abstract

Specificity and dynamics of H2O2 detoxification by the cytosolic redox regulatory network as revealed by in vitro reconstitution

Cited by 1 publication

References 80 publications

Alternative electron sinks in chloroplasts and mitochondria of halophytes as a safety valve for controlling ROS production during salinity

Alternative electron sinks in chloroplasts and mitochondria of halophytes as a safety valve for controlling ROS production during salinity

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