race between plants and insects that resulted in a plethora of defense molecules in
both counterparts. We have discussed the molecular events involved in the
interaction, plant defense mechanism, and strategies employed by insects to
combat plant defense. Furthermore, we have also focused on the coevolution of
these molecules and their implications on plant-insect dialogue. We believe that
this chapter will provide detailed molecular insights involved in the plant-insect
interaction.
Keywords
Plant-insect interactions · Coevolution · Diversification
Abbreviations
CO
Carbon monoxide
DAMPs Damage-associated molecular patterns
FACs
Fatty acid amino acid conjugates
GLV
Green leaf volatiles
GOX
Glucose oxidase
GRN
Gustatory neurons
GRs
Gustatory receptors
GSH
Glutathione
GST
Glutathione-S-transferase
H2O2
Hydrogen peroxide
HAMPs Herbivore-associated molecular patterns
HIPVs
Herbivore-inducible plant volatiles
JA
Jasmonic acid
MAMPs Microbe-associated molecular patterns
MYA
Million years ago
OPDA
12-oxophytodienoic acid
ORN
Olfactory neurons
ORs
Olfactory receptors
P450
P450 monooxygenase
PAMPs
Pathogen-associated molecular patterns
PRR
Plant recognition receptors
SA
Salicylic acid
UGT
UDP glucosyl-transferase
VOCs
Volatile compounds
1
Introduction
After the origin of life, the earth started to flourish with a plethora of life forms.
These life forms establish different kinds of interactions among themselves and the
surrounding environment. Some groups of organisms have exclusive mutual interactions, which drive their coevolution. Though there is a considerable debate on the
timeline of plant-insect interactions, it is one of the most primitive and successful
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S. S. Zunjarrao et al.