BYRD, J. D.

CANTRELL, C. L.

CERDEIRA, A. L.

DUKE, S. O.

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HomeSubject ListAlphabetical ListHelpFAQHighlightsDeutsche VersionQuick SearchAdvanced Search >>Single ArticlesView Shopping CartLogInUsernamePasswordRegister NowForgot yourpassword?Thieme eJournals / Abstract Contact UsPlanta Med 2011; 77DOI: 10.1055/s-0031-1273568Phytotoxic Activity of Imperata cylindrica (L.) P.Beauv. ExtractsAL Cerdeira 1, CL Cantrell 2, JD Byrd 3, SO Duke 21 Brazilian Department of Agriculture, Embrapa/Environment, C.P. 69,Jaguariúna, SP, 13820-000, Brazil2 USDA-ARS, The National Center for Natural Products Research (NPURU),University, MS, 386553 Mississippi State University, Plant and Soil Sciences, Mississippi State,MS, 39762Cogongrass (Imperata cylindrica) is considered to be one of the ten mosttroublesome and problematic weedy species in the world. This species isfound throughout tropical and subtropical regions, generally in areasdisturbed by human activities. Cogongrass is a major impediment toreforestation efforts in southeast Asia, and is responsible for thousands ofhectares of lost native habitat in the southeastern U.S. Several medicinalbioactive compounds were identified from this species. Among them,cylindrene, a sesquiterpenoid with inhibitory activity on contractions ofvascular smooth-muscle [1], graminone-B, a lignan with vasodilativeactivity [2] and imperanene, a phenolic compound with plateletaggregation inhibitory activity [3]. Congongrass has been previouslyreported to be allelopathic. These studies showed a decrease in germinationand growth of shoot and root biomass of several weed species to be causedby the foliage and rhizome plus root residues of cogongrass [4,5]. In ourstudies, we found no phytotoxic activity of root or aerial parts whenextracted with methylene chloride, methanol or water on Lactuca sativa andAgrostis stolonifera at 1.0mg/mL. We found phytotoxic activity of totalessential oil extracts of aerial parts. Further studies are being conductedwith bioactivity-guided fractionation using silica gel columnchromatography of the essential oil extract in an effort to identify andisolate the phytotoxic compounds responsible for the phytotoxic effects.References: [1] Matsunaga K, Shibuya M, et al. (1994)J Nat Prod, 57:1183-1184. [2] Matsunaga K, Shibuya M, et al. (1994)J Nat Prod, 57:1734-1736. [3] Matsunaga K, Shibuya M, et al. (1995)J Nat Prod, 58:138-139. [4] Koger CH, Bryson CT (2004) Weed Technol, 18: 236-242. [5]Koger CH, Bryson CT, et al. (2004) Weed Technol, 18: 353-357.ContentAbstract Only (Why?)Table of Contents ofthis IssueOther Issues:2011IssueCongress Abstracts10th Annual OxfordInternationalConference on theScience of Botanicals(ICBS) AbstractsList of AuthorsAbout This JournalAims and ScopeEditorial InformationInstructions for AuthorsSubmit a ManuscriptSubscribe NowServiceSample Issue(01/2011)Recommend this ArticleRecommend thisJournalGerman NationalLicenseDownloadBibliographical DataBookmark Article    Connotea    Delicious    CiteULike©Thieme eJournals is a service of the Thieme Medical Publishers, Inc. andGeorg Thieme Verlag.Georg Thieme Verlag KG Stuttgart New York. All rights reserved.Impressum / DisclaimerThieme eJournals - Abstract https://www.thieme-connect.de/ejournals/abstract/plantamedica/doi/10...1 de 1 12/8/2011 14:50

Phytotoxic Activity of Imperata cylindrica (L.) P. Beauv. Extracts.

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