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

% trichloroacetic acid. The absorbance of the supernatant was measured at 280 nm. Polyphenol oxidase activity assay. The polyphenol oxidase (PPO) assay was performed in a mixture containing 2.85 mL of 50 m m PBS (pH 7.0), 50 µL of 60 m m catechol, and 0.1 m m of

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Jorge M. Fonseca, Hyun-Jin Kim, Wesley L. Kline, Christian A. Wyenandt, Murshidul Hoque, Husein Ajwa, and Ned French

.4.1341 Barbagallo, R.N. Chisari, M. Branca, F. Spagna, G. 2008 Pectin methylesterase, polyphenol oxidase and physicochemical properties of typical long-storage cherry tomatoes cultivated under water stress regime J. Sci. Food Agr

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

aspirin, tea polyphenols, and retinoic acid, have been reported to inhibit cell transformation and tumor promotion by suppressing AP-1 transactivation ( Agadir et al., 1999 ; Dong et al., 1997a , b ). Nuclear factor-κB is a heterodimeric protein

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Yuji Yamada, Masayoshi Nakayama, Hiromitsu Shibata, Sanae Kishimoto, and Takashi Ikeda

) and Zipor et al. (2015) argued that peroxidase requires H 2 O 2 and that polyphenol oxidase requires O 2 for the anthocyanin degradation reaction. Furthermore, Barbagallo et al. (2007) showed that β-glucosidase hydrolyzes anthocyanin. However

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Peter Nveawiah-Yoho, Jing Zhou, Marsha Palmer, Roger Sauve, Suping Zhou, Kevin J. Howe, Tara Fish, and Theodore W. Thannhauser

functions in stress tolerance. Two enzymes were only induced in LA3465, which include aldehyde dehydrogenase in detoxifying peroxidic aldehydes, which result from lipid peroxidation, and polyphenol oxidase. Several studies on tomato have shown that an

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El-Sayed Mohamed El-Mahrouk, Eman Abdel-Hakim Eisa, Mahmoud Abdelnaby Hegazi, Mohamed El-Sayed Abdel-Gayed, Yaser Hassan Dewir, Mohammed Elsayed El-Mahrouk, and Yougasphree Naidoo

zero, and the actual reading corresponded to the absorbance after 1 min. One unit of CAT activity was defined as a 0.01 decrease in absorbance at 240 nm/mg of protein/min. Polyphenol oxidase assay. Polyphenol oxidase (PPO; EC activity was

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Rebecca E. Stein-Chisholm, John W. Finley, Jack N. Losso, and John C. Beaulieu

Roberts, 2004 ; Lee et al., 2002 ). In addition to increased juice recovery, the elevated temperature also denatures native enzymes, such as polyphenol oxidase, that can otherwise cause degradation of flavor, color, and phytochemical levels ( Patras et al

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Suping Zhou, Marsha Palmer, Jing Zhou, Sarabjit Bhatti, Kevin J. Howe, Tara Fish, and Theodore W. Thannhauser

), and thioredoxin (2.18-fold) were induced only in S. chilense LA1958. Polyphenol oxidases (PPO) catalyze the reaction for the formation of cytotoxic orthoquinones. In the dehydration treated S. chilense LA1958, PPO was repressed (–1.93-fold), but

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Carmina Gisbert, Judith M. Dumm, Jaime Prohens, Santiago Vilanova, and John R. Stommel

polyphenol oxidase genes in a new interspecific anchored linkage map of eggplant BMC Plant Biol. 14 350 Griesbach, R.J. 2005 Biochemistry and genetics of flower color Plant Breed. Rev. 25 89 114 Griesbach, R.J. Beck, R.M. 2005 Sequence analysis of the