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Yali He and Bingru Huang

). Ascorbate peroxidase (APX) is characterized by its high degree of specificity for ascorbate as the electron donor and by its physiological role in the scavenging of hydrogen peroxide ( Asada, 1992 ; Asada et al., 1993 ). Guaiacol peroxidases (POD) are

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Priscila L. Gratão, Carolina C. Monteiro, Lázaro E.P. Peres and Ricardo Antunes Azevedo

have concentrated our attention on some of the key antioxidant enzymes such as catalase (CAT), guaiacol peroxidase (GPOX), ascorbate peroxidase (APX), glutathione reductase (GR), and superoxide dismutase (SOD). The Micro-Tom cultivar was kindly

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Georgia Ntatsi, Dimitrios Savvas, Georgia Ntatsi, Hans-Peter Kläring and Dietmar Schwarz

damaging effect of ROS is prevented through the scavenging activity of antioxidants such as superoxide dismutase (SOD, EC 1.12.1.1) and guaiacol peroxidase (GPOD, EC 1.11.1.7) ( Sundar et al., 2004 ). ROS scavenging capacity can be enhanced by hormones such

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Shiow Y. Wang, Kim S. Lewers, Linda Bowman and Min Ding

main antioxidant enzymes in strawberry fruit are superoxide dismutase (SOD), guaiacol peroxidase (G-POD), glutathione peroxidase (GSH-POD), ascorbate peroxidase (AsA-POD), monodehydroascorbate reductase (MDAR), dehydroascorbate reductase (DHAR), and

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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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Shuai-Ping Gao, Kang-Di Hu, Lan-Ying Hu, Yan-Hong Li, Yi Han, Hui-Li Wang, Kai Lv, Yong-Sheng Liu and Hua Zhang

that of H 2 S-fumigated fruit. Fig. 4. Effect of hydrogen sulfide (H 2 S) [1.0 mmol·L −1 sodium hydrosulfide (NaHS)] on the activities of ( A ) guaiacol peroxidase (POD), ( B ) catalase (CAT), ( C ) ascorbate peroxidase (APX), ( D ) glutathione

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Ju Ding, Kai Shi, Yan-Hong Zhou and Jing-Quan Yu

for antioxidant enzyme analysis, including superoxide dismutase (SOD), ascorbate peroxidase (APX), guaiacol peroxidase (GPX), and catalase (CAT). All operations were carried out at 0 to 4 °C. An aliquot of the extract was used to determine its protein

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Ji-Lian Zheng, Lan-Ying Hu, Kang-Di Hu, Jun Wu, Feng Yang and Hua Zhang

(H 2 S) on the activities of ( A ) catalase (CAT); ( B ) ascorbate peroxidase (APX); ( C ) guaiacol peroxidase (POD); ( D ) superoxide dismutase (SOD); ( E ) glutathione reductase (GR); ( F ) lipoxygenase (LOX); ( G ) polyphenol oxidase (PPO); ( H

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Jun Tang, Kang-Di Hu, Lan-Ying Hu, Yan-Hong Li, Yong-Sheng Liu and Hua Zhang

water added. Reducing sugar was determined spectrophotometrically at 540 nm and the results are expressed as milligrams per gram fresh weight (FW). Determination of guaiacol peroxidase, polyphenol oxidase, lipoxygenase activities, and malondialdehyde

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Lixin Xu, Liebao Han and Bingru Huang

) with the exception of CAT-3 from maize ( Zea mays ), which is mitochondrial ( Scandalios et al., 1980 ). Many isoenzymes of guaiacol peroxidase, which may tend to ameliorate H 2 O 2 accumulation in plant tissues, are localized in vacuoles, the cell