Volatile uptake, transport, perception, and signaling shape a plant's nose

Area of Science:

• Plant biology
• Chemical ecology
• Plant defense mechanisms

Background:

• Undamaged plants can be alerted to herbivore attack by airborne compounds called plant volatiles released by neighboring plants.
• The precise molecular mechanisms plants use to detect and respond to these volatiles are not fully understood.
• This knowledge gap limits our understanding of plant-environment interactions and community dynamics.

Purpose of the Study:

• To explore the uptake, perception, and signaling pathways of herbivore-induced plant volatiles in plants.
• To identify the key molecular components involved in translating volatile perception into defense responses.
• To investigate the variability in plant responses to volatiles.

Main Methods:

• Literature review and synthesis of current research on plant volatile perception and signaling.
• Analysis of known plant defense pathways, including mitogen-activated protein kinases (MAPKs), WRKY transcription factors, and jasmonates.
• Hypothesizing mechanisms of volatile uptake (stomata, cuticle) and perception (membrane-associated and intracellular receptors).

Main Results:

• Plant volatiles can enter plants via stomata and the cuticle.
• Perception likely involves both cell surface and intracellular receptors, potentially requiring metabolization and transport.
• Defense signaling involves key components like MAPKs, WRKYs, and jasmonates.

Conclusions:

• Plant volatile signaling is a complex process involving diverse molecular mechanisms.
• Significant variations in plant responsiveness to volatiles are expected due to spatiotemporal and developmental factors.
• Understanding these variations is crucial for comprehending plant-environment interactions.