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Carolina A. Torres, Omar Hernandez, Maria A. Moya-León, Ivan Razmilic and David R. Rudell

., 2006 ). Defense mechanisms activated in tissue exposed to direct sunlight or during early stages of sunburn include antioxidants (i.e., AsA, GSH) and enzymes functioning as antioxidants or regeneration of antioxidants such as, ascorbate peroxidase (APX

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Zhi-Rong Li, Kang-Di Hu, Fen-Qin Zhang, Shi-Ping Li, Lan-Ying Hu, Yan-Hong Li, Song-Hua Wang and Hua Zhang

BoLCD (L-cysteine desalfhydrase) ( A ). Effects of H 2 S fumigation on the expression of BoLOX (lipoxygenase), BoCAT (catalase), BoAPX (ascorbate peroxidase), and BoGR (glutathione reductase) ( B ). Effects of H 2 S fumigation on the relative

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An Qin, Xiaosan Huang, Huping Zhang, Juyou Wu, Jie Yang and Shaoling Zhang

enzymes, including ascorbate peroxidase (APX; EC 1.11.1.11), monodehydroascorbate reductase (MDHAR; EC 1.6.5.4), DHAR, and glutathione reductase (GR; EC 1.6.4.2), play an important role in protecting plants against environmental stresses. AsA is oxidized

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Lingyun Yuan, Yujie Yuan, Shan Liu, Jie Wang, Shidong Zhu, Guohu Chen, Jinfeng Hou and Chenggang Wang

) . Activities of antioxidative enzymes in chloroplasts. Ascorbate peroxidase (APX) activity was measured by Nakano and Asada (1981) with slight modifications. Reaction buffer solution contained 50 m m K-P buffer (pH 7.0), 0.5 m m AsA, 0.1 m m H 2 O 2 , 0

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Rocío Leyva, Christian Constán-Aguilar, Begoña Blasco, Eva Sánchez-Rodríguez, Teresa Soriano and Juan M. Ruíz

antioxidative enzymes such as superoxide dismutase (SOD), catalase (CAT), guaiacol peroxidase (GPX), and enzymes involved in the ascorbate–glutathione cycle (Halliwell-Asada cycle) ascorbate peroxidase (APX), dehydroascorbate reductase (DHAR

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Sanalkumar Krishnan, Kevin Laskowski, Vijaya Shukla and Emily B. Merewitz

) bars represent least significant difference values ( P ≤ 0.05) for treatment comparison at a given day of treatment. Fig. 8. ( A ) Ascorbate peroxidase and ( B ) peroxidase activity of perennial ryegrass ‘CSI’ leaves treated with γ-aminobutyric acid

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Pedro Novillo, Alejandra Salvador, Pilar Navarro and Cristina Besada

., 2003 ). The ROS metabolism is controlled by an array of interrelated enzymes, such as superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), and peroxidase (POD), which act concomitantly with nonenzymatic antioxidants; O 2 − is

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Qing Xu, Shi-Rong Guo, He Li, Nan-Shan Du, Sheng Shu and Jin Sun

— superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), and ascorbate peroxidase (APX). The activity of SOD was determined according to the method of Dhindsa et al. (1981) . One unit of enzyme activity was taken as the activity to cause 50% inhibition

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Mohamad-Hossein Sheikh-Mohamadi, Nematollah Etemadi and Mostafa Arab

systems to eradicate ROS during oxidative stress. This includes both enzymatic and nonenzymatic components, such as superoxide dismutase (SOD), Glutathione (GSH), catalase (CAT), peroxidase (POD), and ascorbate peroxidase (APX) ( Sheikh-Mohamadi et al

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Gang Lu, Wenlei Jian, Jiajing Zhang, Yijing Zhou and Jiashu Cao

. Soc. Hort. Sci. 117 906 912 Cakmak, I. Marschner, H. 1992 Magnesium deficiency and high light intensity enhance activities of superoxide dismutase, ascorbate peroxidase, and glutathione reductase in bean leaves