Volatile Organic Compounds as Herbivory Warning Signals in Salvia rosmarinus
Ferretti M, Al-Rashid N, Okonkwo P
Plant Signaling
It means the rosemary in your garden is actively communicating with surrounding plants, and understanding this could help gardeners and farmers use companion planting to naturally reduce pest damage without pesticides.
When a bug starts munching on a rosemary plant, the plant quickly releases invisible chemicals into the air — a kind of silent alarm. Nearby rosemary plants pick up on these airborne signals and switch on their own built-in defenses, essentially bracing for an attack that hasn't reached them yet. This all happens in a matter of hours, entirely without the plants touching each other.
Key Findings
Rosemary plants release distinct chemical warning signals (methyl jasmonate) within 30 minutes of herbivore damage
Neighboring rosemary plants activate defense genes up to 2 hours before any physical contact with the herbivore
The defense priming is triggered solely through airborne chemical signals, requiring no physical connection between plants
chevron_right Technical Summary
Rosemary plants can warn their neighbors of insect attack by releasing chemical signals into the air, and those neighbors respond by activating defenses before any bug even touches them.
Abstract Preview
Rosemary plants emit distinct methyl jasmonate profiles within 30 minutes of herbivore damage. Neighboring plants receiving these VOCs upregulate proteinase inhibitor genes 2 hours before physical ...
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Species Mentioned
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Salvia rosmarinus, synonym Rosmarinus officinalis, commonly known as rosemary, is a shrub with fragrant, evergreen, needle-like leaves and purple or sometimes white, pink, or blue flowers. It is a member of the mint family, Lamiaceae.