Chemical composition and inhibitory activity of essential oil from decaying leaves of Eucalyptus citriodora

Batish, Daizy R. ; Singh, Harminder Pal ; Setia, Nidhi ; Kaur, Shalinder ; Kohli, Ravinder K. (2006) Chemical composition and inhibitory activity of essential oil from decaying leaves of Eucalyptus citriodora Zeitschrift für Naturforschung - C, 61 (1-2). pp. 52-56. ISSN 0939-5075

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Official URL: http://znaturforsch.com/ac/v61c/61c0052.pdf

Abstract

A study was undertaken to explore the content and composition of volatile oil from decaying leaves of lemon-scented eucalypt (Eucalyptus citriodora Hook.) not analyzed earlier. GC and GC-MS analysis of the oil (yield 0.6%) revealed the monoterpenoid nature with citronellal (52.2%), citronellol (12.3%) and isoisopulegol (11.9%) as the major constituents. Overall, 17 components were identified that accounted for over 94% of the decaying leaf oil. Surprisingly, the decaying leaf oil contained nearly 1.8% of trans-rose oxide, which is generally absent in eucalypt essential oil. Decaying leaf oil and its major 2 components (citronellal and citronellol) inhibited the germination and root elongation of two weeds-Cassia occidentalis (broad-leaved) and Echinochloa crus-galli (grassy weed). Based on the dose-response studies, I50 values were determined for decaying leaf oil and the effect was more on germination only of broad-leaved weed (C. occidentalis), whereas that of citronellal and citronellol were on germination as well as root length of E. crus-galli (grassy weed). Based on I50 values it was observed that citronellal was more phytotoxic and germination inhibiting in nature, whereas citronellol was a more potent root inhibitor, thereby indicating a possible different mode of action. The study concludes that decaying leaf oil hold a good commercial value for exploitation as weed management agent.

Item Type:Article
Source:Copyright of this article belongs to Verlag der Zeitschrift für Naturforschung.
Keywords:Decaying Leafessential Oils; I50 Values; Germination Inhibitor
ID Code:76237
Deposited On:31 Dec 2011 08:39
Last Modified:31 Dec 2011 08:39

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