Browsing by Author "Sonmez, Mustafa Cemre"

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Citation - WoS: 7
Citation - Scopus: 6
Alternative electron sinks in chloroplasts and mitochondria of halophytes as a safety valve for controlling ROS production during salinity
(John Wiley and Sons Inc, 2024) Nil Demircan; Mustafa Cemre Sonmez; Turgut Yigit Akyol; Rengin Özgür Uzilday; I. Turkan; Karl Josef Dietz; B. Uzilday; Dietz, Karl-Josef; Uzilday, Baris; Demircan, Nil; Ozgur, Rengin; Turkan, Ismail; Akyol, Turgut Yigit; Sonmez, Mustafa Cemre
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. © 2024 Elsevier B.V. All rights reserved.
Citation - Scopus: 4
Roles of Reactive Carbonyl Species (RCS) in Plant Response to Abiotic Stress
(Humana Press Inc., 2024) Mustafa Cemre Sonmez; Side Selin Su Yirmibesoglu; Rengin Özgür Uzilday; B. Uzilday; I. Turkan; Ozgur, Rengin; Turkan, Ismail; Sonmez, Mustafa Cemre; Yirmibesoglu, Side Selin Su; Uzilday, Baris
Abiotic and biotic stress conditions lead to production of reactive carbonyl species (RCS) which are lipid peroxide derivatives and have detrimental effects on plant cells especially at high concentrations. There are several molecules that can be classified in RCS, among them 4-hydroxy-(E)-2-nonenal (HNE) and acrolein are widely recognized and studied because of their toxicity. The toxicity mechanisms of RCS are well known in animals but their roles in plant systems especially signaling aspects in metabolism need to be addressed. This chapter focuses on the production mechanisms of RCS in plants as well as how plants scavenge and modify them to prevent irreversible damage in the cell. We aimed to get a comprehensive look at the literature to summarize the signaling roles of RCS in plant metabolism and their interaction with other signaling mechanisms such as highly recognized reactive oxygen species (ROS) signaling. Changing climate promotes more severe abiotic stress effects on plants which also decrease yield on the field. The effects of abiotic stress conditions on RCS metabolism are also gathered in this chapter including their signaling roles during abiotic stresses. Different methods of measuring RCS in plants are also presented in this chapter to draw more attention to the study of RCS metabolism in plants. © 2024 Elsevier B.V. All rights reserved.