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

BANCHIO, E.; ZYGADLO J.; VALLADARES, G.

JOURNAL OF CHEMICAL ECOLOGY

Springer Science

Año: 2005 vol. 31 p. 719 - 719

0098-0331

p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: justify">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 an