5 Polyphenol oxidases in plants: diverse role and functions
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Saranya G.
Abstract
Polyphenol oxidases (PPOs) are oxygen-dependent metalloenzymes ubiquitous in plants and play an important role in browning reactions. In higher plants, the enzyme protects plant against pest attacks. It is assumed that the PPOs modulate photosystem I or photosystem II reduction of molecular oxygen under low oxygen tension. These are also known to produce compounds that are able to oxidize phenolic molecules hence provide scope for biotechnological applications in food processing, bioremediation, and an increased yield in crops. Biochemical aspects in these enzymes are widely studied in terms of the metabolic reactions in pathways, enzyme activities, and inhibition assays. PPOs play their role in the development of plants. Regarding the physiological and molecular functioning of PPO, the correlation between PPO expression and stress responses is well studied in different plants. Polyphenols are the most important metabolites playing crucial role in antioxidant activities in some of the plants. Hence, it is interesting to investigate the diversified role of PPOs in different plant species.
Abstract
Polyphenol oxidases (PPOs) are oxygen-dependent metalloenzymes ubiquitous in plants and play an important role in browning reactions. In higher plants, the enzyme protects plant against pest attacks. It is assumed that the PPOs modulate photosystem I or photosystem II reduction of molecular oxygen under low oxygen tension. These are also known to produce compounds that are able to oxidize phenolic molecules hence provide scope for biotechnological applications in food processing, bioremediation, and an increased yield in crops. Biochemical aspects in these enzymes are widely studied in terms of the metabolic reactions in pathways, enzyme activities, and inhibition assays. PPOs play their role in the development of plants. Regarding the physiological and molecular functioning of PPO, the correlation between PPO expression and stress responses is well studied in different plants. Polyphenols are the most important metabolites playing crucial role in antioxidant activities in some of the plants. Hence, it is interesting to investigate the diversified role of PPOs in different plant species.
Chapters in this book
- Frontmatter I
- About the editors V
- Preface VII
- Acknowledgments IX
- Contents XI
- Contributors XIII
- 1 Polyphenol oxidases: an enzyme of bacteria and fungi 1
- 2 Bacterial polyphenol oxidases and their applications in bioremediation 25
- 3 Fungal polyphenol oxidases and their applications in bioremediation 69
- 4 Polyphenol oxidase: an enzyme of plants 105
- 5 Polyphenol oxidases in plants: diverse role and functions 129
- 6 Polyphenol oxidase-based biosensors for the recognition of phenolic pollutants 147
- 7 Unlocking nature’s remediation arsenal: the role of polyphenol oxidases in efficient and eco-friendly industrial wastewater treatment 171
- 8 Application, current and future trends of bacterial and fungal polyphenol oxidases (laccases) 189
- 9 Statistical strategies for analyzing the production of polyphenol oxidase 223
- 10 Strategic adaptation for the enzymatic data analysis using ANOVA/MANOVA in R 257
- 11 Polyphenol oxidases: challenges and future prospects 293
- 12 Polyphenol oxidases: the future toward global sustainability 309
- Index 345
Chapters in this book
- Frontmatter I
- About the editors V
- Preface VII
- Acknowledgments IX
- Contents XI
- Contributors XIII
- 1 Polyphenol oxidases: an enzyme of bacteria and fungi 1
- 2 Bacterial polyphenol oxidases and their applications in bioremediation 25
- 3 Fungal polyphenol oxidases and their applications in bioremediation 69
- 4 Polyphenol oxidase: an enzyme of plants 105
- 5 Polyphenol oxidases in plants: diverse role and functions 129
- 6 Polyphenol oxidase-based biosensors for the recognition of phenolic pollutants 147
- 7 Unlocking nature’s remediation arsenal: the role of polyphenol oxidases in efficient and eco-friendly industrial wastewater treatment 171
- 8 Application, current and future trends of bacterial and fungal polyphenol oxidases (laccases) 189
- 9 Statistical strategies for analyzing the production of polyphenol oxidase 223
- 10 Strategic adaptation for the enzymatic data analysis using ANOVA/MANOVA in R 257
- 11 Polyphenol oxidases: challenges and future prospects 293
- 12 Polyphenol oxidases: the future toward global sustainability 309
- Index 345
