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Differential Changes in Tea Quality as Influenced by Insect Herbivory

  • Eric R. Scott
  • Colin M. OriansEmail author
Chapter

Abstract

Tea quality depends on plant metabolites that impact flavor, aroma, and health-beneficial properties. Plants respond to insect herbivory by altering the concentration and blend of these metabolites, and many secondary metabolites are produced only after insect attack. Research in tea and other plants shows that insect herbivores affect the concentrations of metabolites important to tea quality such as volatiles, polyphenols, methylxanthines, and amino acids. Plants, including tea, respond differently to different insect herbivores by producing different blends of metabolites. Tea plant metabolites also vary in their responses to increasing herbivore density which results in a change in metabolite blends as herbivore density changes. Because climate change is predicted to impact the density and species composition of insect herbivores in tea-growing regions of the world, induction of metabolic changes by insect herbivores represents a potentially important indirect effect of climate change on tea quality. Although it is often assumed that insect attack is detrimental to tea quality, there are some cases where tea quality is improved by herbivore-induced changes in tea metabolites. It is therefore possible that allowing some insect herbivory could be an important strategy for mitigating detrimental effects of climate on tea quality.

Keywords

Secondary metabolites Insect herbivory Induced metabolites Eastern Beauty oolong Tea quality Polyphenols Methylxanthines Catechins Amino acids Pests 

Notes

Acknowledgments

The authors would like to thank Professor Lawrence Zhang and David Campbell for information about the origins of Eastern Beauty oolong tea, as well as Clarissa Wei, Lew Perin, and Michael Coffee for advice on the translation of tea names.

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© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  1. 1.Department of BiologyTufts UniversityMedfordUSA

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