Polyphenol Oxidases (PPOs) in Plants

Nonfiction, Science & Nature, Science, Biological Sciences, Biochemistry, Technology, Food Industry & Science
Cover of the book Polyphenol Oxidases (PPOs) in Plants by Aravind Jukanti, Springer Singapore
View on Amazon View on AbeBooks View on Kobo View on B.Depository View on eBay View on Walmart
Author: Aravind Jukanti ISBN: 9789811057472
Publisher: Springer Singapore Publication: August 18, 2017
Imprint: Springer Language: English
Author: Aravind Jukanti
ISBN: 9789811057472
Publisher: Springer Singapore
Publication: August 18, 2017
Imprint: Springer
Language: English

This book is first of its kind exclusively dedicated to plant polyphenol oxidases (PPOs), highlighting their importance in the food processing industry. By reviewing the scientific developments of the past several decades,  it  offers a comprehensive overview of various aspects of plant PPOs, including chemistry, structure, functions, regulation, genetics/genomics and molecular aspects. PPOs  are copper-containing proteins found in several plant species that catalyze the hydroxylation of o-monophenols to o-diphenols and oxidation of the o-dihydroxyphenols to o-quinones. Further, the quonines undergo self-polymerization or react with amines/thiol groups to produce brown/dark coloration of products. All the PPOs contain two Cu-binding sites (CuA and CuB) as their central domain, these interact with phenolic substrates and molecular oxygen. Several of the plant PPOs contain an N-terminal transit peptide (~80-100 amino acids

) necessary for plastid import. The PPOs occur in latent form that are activated by various treatments including acid and base shock, exposure to detergents or  proteolytic degradation. The pH optimum of PPOs varies widely depending upon different plant species but is usually ~4.0 – 8.0. Similarly, the optimum temperature also varies as per the source and substrate involved ranging from 30 to 45 °C.

Multiple PPO isoforms have been reported in several plant species, and the chromosomal location of PPOs has also been studied in some species. The physiological role (s) of PPOs is not entirely understood, but they could be involved in defense-related functions in plants. From an applied perspective, PPOs are implicated in enzymatic browning/darkening of cereal products, vegetables and fruits. Interestingly, browning is preferred in some instances like the processing of black tea, cocoa, and coffee as it enhances their quality by forming flavorful products. There have b

een initiatives to specifically breed and develop cultivars with reasonably low PPO levels in the mature grain or fruit. Further, several types of inhibitors that reduce the PPO activity have also been identified.

Despite their commercial/economic importance and the availability of literature on different aspects of PPOs in different plant species, this is the first book to provide basic information regarding PPOs. It is a valuable resource for researchers involved in quality-related research specifically in crops, vegetables and fruits. Further, as PPOs are also implicated in defense- or stress-related functions, the book is also useful to breeders, pathologists, molecular biologists, physiologists and entomologists.

View on Amazon View on AbeBooks View on Kobo View on B.Depository View on eBay View on Walmart

This book is first of its kind exclusively dedicated to plant polyphenol oxidases (PPOs), highlighting their importance in the food processing industry. By reviewing the scientific developments of the past several decades,  it  offers a comprehensive overview of various aspects of plant PPOs, including chemistry, structure, functions, regulation, genetics/genomics and molecular aspects. PPOs  are copper-containing proteins found in several plant species that catalyze the hydroxylation of o-monophenols to o-diphenols and oxidation of the o-dihydroxyphenols to o-quinones. Further, the quonines undergo self-polymerization or react with amines/thiol groups to produce brown/dark coloration of products. All the PPOs contain two Cu-binding sites (CuA and CuB) as their central domain, these interact with phenolic substrates and molecular oxygen. Several of the plant PPOs contain an N-terminal transit peptide (~80-100 amino acids

) necessary for plastid import. The PPOs occur in latent form that are activated by various treatments including acid and base shock, exposure to detergents or  proteolytic degradation. The pH optimum of PPOs varies widely depending upon different plant species but is usually ~4.0 – 8.0. Similarly, the optimum temperature also varies as per the source and substrate involved ranging from 30 to 45 °C.

Multiple PPO isoforms have been reported in several plant species, and the chromosomal location of PPOs has also been studied in some species. The physiological role (s) of PPOs is not entirely understood, but they could be involved in defense-related functions in plants. From an applied perspective, PPOs are implicated in enzymatic browning/darkening of cereal products, vegetables and fruits. Interestingly, browning is preferred in some instances like the processing of black tea, cocoa, and coffee as it enhances their quality by forming flavorful products. There have b

een initiatives to specifically breed and develop cultivars with reasonably low PPO levels in the mature grain or fruit. Further, several types of inhibitors that reduce the PPO activity have also been identified.

Despite their commercial/economic importance and the availability of literature on different aspects of PPOs in different plant species, this is the first book to provide basic information regarding PPOs. It is a valuable resource for researchers involved in quality-related research specifically in crops, vegetables and fruits. Further, as PPOs are also implicated in defense- or stress-related functions, the book is also useful to breeders, pathologists, molecular biologists, physiologists and entomologists.

More books from Springer Singapore

Cover of the book Migrant and Diasporic Film and Filmmaking in New Zealand by Aravind Jukanti
Cover of the book Feminism(s) in Early Childhood by Aravind Jukanti
Cover of the book Ecological Economics and Harmonious Society by Aravind Jukanti
Cover of the book Artificial Rearing of Reduviid Predators for Pest Management by Aravind Jukanti
Cover of the book Data-Driven Technology for Engineering Systems Health Management by Aravind Jukanti
Cover of the book Understanding and Using Rough Set Based Feature Selection: Concepts, Techniques and Applications by Aravind Jukanti
Cover of the book The Use of First and Second Language in Chinese University EFL Classrooms by Aravind Jukanti
Cover of the book Context-Aware Collaborative Prediction by Aravind Jukanti
Cover of the book Applied Spectroscopy and the Science of Nanomaterials by Aravind Jukanti
Cover of the book Youth Homelessness in Late Modernity by Aravind Jukanti
Cover of the book New Opposition in the Middle East by Aravind Jukanti
Cover of the book Decentralization and Development of Sri Lanka Within a Unitary State by Aravind Jukanti
Cover of the book Policy and Inequality in Education by Aravind Jukanti
Cover of the book Antibiotic Pharmacokinetic/Pharmacodynamic Considerations in the Critically Ill by Aravind Jukanti
Cover of the book Nuclear Power Plants: Innovative Technologies for Instrumentation and Control Systems by Aravind Jukanti
We use our own "cookies" and third party cookies to improve services and to see statistical information. By using this website, you agree to our Privacy Policy