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Polyphenol oxidase activities of Chinese winter wheat cultivars and correlations with quality characteristics

Creator: Ge Xiu-Xiu
Creator: He, Zhonghu
Creator: Yang Jin
Creator: Zhang Qi-Jun
Year: 2003
URI: https://hdl.handle.net/10883/21377
Language: Chinese
Publisher: Institute of Crop Sciences
Copyright: CIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact CIMMYT-Knowledge-Center@cgiar.org indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the suitable license for that purpose.
Type: Article
Place of Publication: Beijing (China)
Pages: 481-485
Issue: 4
Volume: 29
Keywords: Polyphenol Oxidase
Keywords: Brown Discoloration
Publisher URI: http://zwxb.chinacrops.org/EN/Y2003/V29/I04/481
Description: The enzyme polyphenol oxidase( PPO) has been related to undesirable brown discoloration of wheat based end products such as noodles. 164 cultivars from winter wheat region in China were used to screen grain PPO activity , and 83 cultivars were used to determine flour PPO activity and other quality characteristics. Two sets of wheat samples were used to investigate the effects of genotype, environment and their interaction on grain and flour PPO activity. Significant differences in grain and flour PPO activity were observed in the China winter wheat populations. Grain PPO activity among China winter wheats ranged from 1. 93 to 12. 00 A475/ g min - 1 ×103, and flour PPO activity ranged from 0. 22 to 3. 74 A475/ g min - 1 × 103. The variability in grain and flour PPO activities was influenced by growing location and genotype for the winter wheat samples. The variation in grain and flour PPO activities among growing locations appeared smaller than variation produced by genotypes for the winter wheat samples except for soft wheat flour PPO. Flour PPO activities were related to L3 of flour and 24 h fresh noodle sheets , correlation coefficients were - 0. 50 and - 0. 59 respectively. Quality parameters , such as grain hardness , milling yield , flour protein , water absorption and falling number significantly Correlated with flour PPO activities. Test weight, TKW , grain hardness and flour yield affected PPO content through changing bran content, while protein and starch affected PPO activities.
Agrovoc: TRITICUM AESTIVUM
Agrovoc: CATECHOL OXIDASE
Agrovoc: PROCESSING QUALITY
ISSN: 496-3490
Journal: Acta Agronomica Sinica


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  • Wheat
    Wheat - breeding, phytopathology, physiology, quality, biotech

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