Effects of mechanical wounding on essential oil composition and emission of volatiles from Minthostachys mollis

• Published in: Journal of chemical ecology Vol. 31; no. 4; pp. 719 - 727
• Main Authors: Banchio, E, Zygadlo, J, Valladares, G.R
• Format: Journal Article
• Language: English
• Published: New York, NY Springer 01-04-2005; Springer Nature B.V
• Subjects: Animal and plant ecology; Animal, plant and microbial ecology; Animals; Argentina; Autoecology; Biological and medical sciences; chemical constituents of plants; Emission measurements; Essential oils; Flowers & plants; Fundamental and applied biological sciences. Psychology; General aspects; Insecta - physiology; Lamiaceae; Lamiaceae - chemistry; Lamiaceae - metabolism; Leaves; Mechanical properties; medicinal plants; Menthol - analysis; Minthostachys mollis; Monoterpenes; Monoterpenes - analysis; monoterpenoids; Oils & fats; Oils, Volatile - analysis; Oils, Volatile - chemistry; phytochemical induction; phytochemicals; plant damage; Plant Leaves - chemistry; Plant Leaves - metabolism; Plant Oils - analysis; Plant Oils - chemistry; Plant tissues; VOCs; volatile compounds; Volatile organic compounds; Argentina; Volatile compound; mechanical wounding; menthone; Induction; Injury; Phytochemical induction; Emission; Lamiaceae; Wound; monoterpenes; Plant; Monoterpene; aromatic plants; Essential oil; pulegone; Minthostachys mollis
• ISSN: 0098-0331; 1573-1561
• DOI: 10.1007/s10886-005-3540-1

Plant tissues may show chemical changes following damage. This possibility was analyzed for Minthostachys mollis, a Lamiaceae native to Central Argentina with medicinal and aromatic uses in the region. Effects of mechanical damage on its two dominant monoterpenes, pulegone and menthone, were analyzed by perforating M. mollis leaves and then assessing essential oil composition at 24, 48, and 120 hr; emission of volatiles was also measured 24 and 48 hr after wounding. Mechanical damage resulted in an increase of pulegone and menthone concentration in M. mollis essential oil during the first 24 hr. These changes did not occur in the adjacent undamaged leaves, suggesting a lack of systemic response. Postwounding changes in the volatiles released from M. mollis damaged leaves were also detected, most noticeably showing an increase in the emission of pulegone. Inducible chemical changes in aromatic plants might be common and widespread, affecting the specific compounds on which commercial exploitation is based.