Banchio Erika, Zygadlo Julio, Valladares Graciela R
Centro de Investigaciones Entomológicas, FCEFYN, Universidad Nacional de Córdoba, Av. Vélez Sársfield 299, 5000 Córdoba, Argentina.
J Chem Ecol. 2005 Apr;31(4):719-27. 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.
受损后，植物组织可能会出现化学变化。本文针对阿根廷中部土生土长的唇形科植物软毛薄荷进行了此项可能性分析，该植物在当地具有药用和芳香用途。通过在软毛薄荷叶片上打孔，然后在24小时、48小时和120小时评估其精油成分，分析了机械损伤对其两种主要单萜（长叶薄荷酮和薄荷酮）的影响；受伤后24小时和48小时还测量了挥发物的释放量。在最初的24小时内，机械损伤导致软毛薄荷精油中长叶薄荷酮和薄荷酮的浓度增加。相邻未受损叶片未出现这些变化，这表明不存在系统性反应。还检测到了软毛薄荷受损叶片释放的挥发物在受伤后的变化，最明显的是长叶薄荷酮的释放量增加。芳香植物中可诱导的化学变化可能普遍存在，会影响商业开发所基于的特定化合物。
