Book ChapterDOI
Function(s)/Role(s) of Polyphenol Oxidases
Aravind Kumar Jukanti
- pp 73-92
TLDR
Plants under native conditions are exposed to different abiotic and biotic stresses that impact the plant fitness either individually or together; therefore, plant defense mechanisms must exhibit plasticity to combat these different stresses.Abstract:
Plants under native conditions are exposed to different abiotic and biotic stresses that impact the plant fitness either individually or together. Under majority of situations, the plants possess a diverse range of defense traits that help in reducing or eliminating the effects of these stresses. The secondary metabolites that include defense-related proteins play a major role in plant defense. Generally, spatial and temporal differences are observed with occurrence of biotic and abiotic stresses. Additionally, multiple stresses might impact the plant growth simultaneously; therefore, plant defense mechanisms must exhibit plasticity to combat these different stresses. The flexibility of secondary metabolites is due to (i) their role in defense against several stresses both biotic and abiotic and (ii) they are inducible, i.e., secondary metabolites are only expressed or expressed under stress (Thipyapong et al. 2007).read more
Citations
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References
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Journal ArticleDOI
Polyphenol oxidases in plants
Alfred M. Mayer,Eitan Harel +1 more
TL;DR: Two main groups of plant polyphenol oxidases are recognized: the catecholoxidases and the laccases: their purification, subcellular location and protein properties are described.
Journal ArticleDOI
Polyphenol oxidase and peroxidase in fruits and vegetables.
TL;DR: Results of biochemical research including catalytic properties, substrate specificity, susceptibility towards pH and temperature, action of inhibitors, isolation, purification, and characteristics of the enzymes are given, with special emphasis on recent achievements based on high resolution separation and isoenzyme techniques.
Journal ArticleDOI
Polyphenol oxidases in plants and fungi: going places? A review.
TL;DR: The more recent reports on polyphenol oxidase in plants and fungi are reviewed and many details about structure and probably function of PPO have been revealed, but some of the basic questions raised over the years remain to be answered.
Journal ArticleDOI
The biochemistry and control of enzymatic browning
TL;DR: Current approaches to understanding and controlling enzymatic browning are presented, with special focus on the use of antisense RNA as a control method.
Journal ArticleDOI
Plant resistance towards insect herbivores : a dynamic interaction
TL;DR: Both plant defence and insect adaptation involve a metabolic cost, and in a natural system most plant-insect interactions involving herbivory reach a 'stand-off' where both host and herbivore survive but develop suboptimally.
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