01587nam a2200253 a 450000100080000000500110000800800410001910000160006024501150007626002180019152007020040965000200111165000240113165000190115565000150117465000170118965300170120670000200122370000200124370000170126370000170128070000180129770000180131519816902014-03-06       2013    bl uuuu     u00u1 u    #d1 aDUKE, S. O.  aPotential allelochemicals of the invasive species Carduus nutans L. and C. acanthoides.h[electronic resource]  aIn: WEED SCIENCE SOCIETY OF AMERICA / NORTHEASTERN WEED SCIENCE SOCIETY, 2013, Baltimore. Annual Meeting. Proceedings... Baltimore: Weed Science of America, Northeastern Weed Science Society, 2013. Ref. 254.c2013  aThe thistles Carduus nutants L. and C. acanthoides L. have both been implicated as allelopathic species. These Eurasian native plants are invasive in the U.S. and other parts of the world, competing well with many native species. Bioassay-guided isolation of phytotoxins from shoots and roots of this plant revealed that a chemical found in the roots, aplotaxene (heptadeca-1,8,11,14-tetrane), to be the most likely candidate as an allelochemical. Contrary to the published work of others, we found that this compound to be moderately phytotoxic. It was also found in relatively large amounts in the roots of both Carduus species, and we found the compound to be exuded by the roots into the soil.  aAllelochemicals  aCarduus acanthoides  aCarduus nutans  aAlelopatia  aErva daninha  aFitotoxidade1 aCERDEIRA, A. L.1 aCANTRELL, C. L.1 aSILVA, F. M.1 aCORNIANI, N.1 aVELINI, E. D.1 aDONEGA, M. A.