Essential Oils as "A Cry for Help". A Review.

Area of Science:

• Plant Science
• Chemical Ecology
• Entomology

Background:

• Plants are not passive organisms and exhibit plasticity in response to environmental cues.
• Herbivore-induced plant volatiles (HIPVs) play a crucial role in plant defense mechanisms.
• Indirect defense involves plant responses that benefit from third trophic level interactions.

Purpose of the Study:

• To provide an updated review of plant indirect defense mechanisms.
• To discuss the role of HIPVs in mediating interactions between plants, herbivores, and natural enemies.
• To explore the application of HIPVs in biological control strategies.

Main Methods:

• Review of recent findings on plant indirect defense.
• Analysis of studies on herbivore-induced plant volatiles (HIPVs).
• Presentation of laboratory and field methods for studying insect behavior in response to HIPVs.
• Discussion of genetic manipulation techniques (gene silencing/overexpression) to understand defense mechanisms.

Main Results:

• Plants perceive and respond to herbivore attacks through plastic morphological, physiological, and behavioral changes.
• HIPVs provide crucial information for carnivorous insects, influencing their decision-making.
• Various examples demonstrate the effectiveness of indirect defense strategies.

Conclusions:

• Plants actively signal for help from natural enemies via HIPVs.
• Understanding HIPVs can lead to reduced reliance on synthetic pesticides.
• HIPVs hold significant potential for developing environmentally friendly biological control agents.