Cellular redox regulation, signaling, and stress response in plants

Abstract

Cellular and organellar redox states, which are characterized by the balance between oxidant and antioxidant pool sizes, play signaling roles in the regulation of gene expression and protein function in a wide variety of plant physiological processes including stress acclimation. Reactive oxygen species (ROS) and ascorbic acid (AsA) are the most abundant oxidants and antioxidants, respectively, in plant cells; therefore, the metabolism of these redox compounds must be strictly and spatiotemporally controlled. In this review, we provided an overview of our previous studies as well as recent advances in (1) the molecular mechanisms and regulation of AsA biosynthesis, (2) the molecular and genetic properties of ascorbate peroxidases, and (3) stress acclimation via ROS-derived oxidative/redox signaling pathways, and discussed future perspectives in this field.

NaCl-induced physiological and biochemical adaptative mechanisms in the ornamental Myrtus communis L. plants

“…The effect of NaCl in reducing APX activity has been described in other plant species, including in vitro grapevine plantlets (Ikbal et al, 2014), anger plants (Hernández et al, 2003) or in pea leaves (Hernández et al, 2001). Thus, APX activity seems to be crucial for plant stress tolerance as well as for growth and development (Shigeoka and Maruta, 2014). In a wheat mutant line, showing a 40% decrease in thylakoidal APX, a decline in P N as well as in growth and seed production was reported (Danna et al, 2003).…”

Silenced rice in both cytosolic ascorbate peroxidases displays pre-acclimation to cope with oxidative stress induced by 3-aminotriazole-inhibited catalase

“…Cytosolic APXs are considered the most important peroxidases to scavenging and maintaining H 2 O 2 homeostasis in cytosol (Davletova et al, 2005;Koussevitzky et al, 2008;Maruta et al, 2012;Pnueli et al, 2003;Suzuki et al, 2013b). These enzymes are present in large amounts, exhibit high activity, and the expression of their genes is strongly responsive to abiotic and biotic stresses (Shigeoka and Maruta, 2014). Moreover, experimental evidence obtained from Arabidopsis has suggested that these enzymes are crucial for cell signaling, antioxidant protection and photosynthesis (Davletova et al, 2005;Koussevitzky et al, 2008;Maruta et al, 2012;Pnueli et al, 2003;Suzuki et al, 2013b).…”

Arbuscular Mycorrhizal Fungus Alleviates Chilling Stress by Boosting Redox Poise and Antioxidant Potential of Tomato Seedlings

“…The cellular and organellar redox states play signaling roles in the regulation of gene and protein expression in a wide variety of plant physiological processes including stress acclimation (Shigeoka and Maruta 2014). Zhou and others (2012b) reported that hydrogen peroxide (H 2 O 2 ) generated by triphosphopyridine nucleotide NADPH oxidase in the apoplast of plant cells plays a crucial role in cold acclimation-induced tolerance.…”