Mechanisms of Salt Tolerance in Transgenic Arabidopsis thaliana Carrying a Peroxisomal Ascorbate Peroxidase Gene from Barley1
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Physiological and quantitative proteomic analysis of NtPRX63-overexpressing tobacco plants revealed that NtPRX63 functions in plant salt resistance
2020, Plant Physiology and BiochemistryCitation Excerpt :Upregulation of the genes that encode proteins of plant antioxidative machinery and the constitutive high-level expression of certain antioxidant enzymes, such as SOD, CAT, APX, MDHAR, and GR, are considered important mechanisms of salt tolerance (Gueta-Dahan et al., 1997; Gómez et al., 1999; Tsugane et al., 1999; Hernández et al. 2000, 2001, 2003; Mittova et al. 2002, 2003; López-Gómez et al., 2007; Rubio et al., 2009). Moreover, transgenic plants overexpressing Cu/Zn-SOD, Mn SOD, CAT, APX and PRX in conjunction with the increased antioxidant activity of SOD, CAT, POD, APX and PRX exhibited high salt tolerance (Badawi et al., 2004; Wang et al. 2004, 2010; Yoshimura et al., 2004; Gaber et al., 2006; Al-Taweel et al., 2007; Kim et al., 2008; Prashanth et al., 2008; Xu et al., 2008; Diaz-Vivancos et al., 2013). Peroxidases (PRXs) are very important enzymes that are crucial for various biological processes in cells.
L-Cysteine hydrochloride delays senescence of harvested longan fruit in relation to modification of redox status
2018, Postharvest Biology and TechnologyCitation Excerpt :GSTs can reduce peroxides with the help of GSH and produce scavengers of cytotoxic and genotoxic compounds (Gill and Tuteja, 2010). There is mounting evidence that enhanced expression of APX, GR, DHAR or GST by genetic modification alleviate oxidative damage and enhance tolerance to various abiotic stress in plants (Xu et al., 2008; Lee et al., 2007; Eltayeb et al., 2007; Zhao and Zhang, 2006; Kornyeyev et al., 2003). In the present study, application of LCH resulted in up-regulated expression of APX during late storage (Fig. 3), benefiting the elimination of H2O2 (Fig. 2).
Differential gene expression of salt-stressed Peganum harmala L.
2016, Journal of Genetic Engineering and BiotechnologyExogenous glutathione confers high temperature stress tolerance in mung bean (Vigna radiata L.) by modulating antioxidant defense and methylglyoxal detoxification system
2015, Environmental and Experimental BotanyCitation Excerpt :A further increase in APX activity (only after 24 h) by adding exogenous GSH with HT treatment might increase its ROS scavenging capacity. A higher APX activity reduced H2O2 and MDA content in Arabidopsis thaliana under salt stress (Xu et al., 2008) and enhanced HT stress in tomato (Wang et al., 2006). During scavenging H2O2, APX activity generates monodehydroascorbate (MDHA) from AsA, which is converted to AsA by MDHAR, or non-enzymatically to AsA and dehydroascorbate (DHA).
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Project supported by a grant of CAS (Chinese Academy of Sciences) Research Program on Soil Biosystems and Agro-Product Safety (No. CXTD-Z2005-4) and the Knowledge Innovation Project of CAS (No. KZCX3-SW-439).