Journal
SOIL BIOLOGY & BIOCHEMISTRY
Volume 39, Issue 7, Pages 1812-1815Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.soilbio.2007.01.020
Keywords
Acroptilon repens; flavone; or-naphthoflavone; rhizotoxin; soil extraction
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Allelopathy as a mechanism of invasion in plant communities remains a debated topic, partly due to lack of techniques to measure allelochemical output and stability in the field. Evidence has arisen to support allelopathic mechanisms in several invasive knapweeds, including Russian knapweed. Previous studies have shown that a phytotoxin, 7,8-benzoflavone, is produced by Russian knapweed roots under soil-free conditions. Here we describe a high performance liquid chromatography (HPLC) method to detect this compound in soil and we present the first observations of this compound from Russian knapweed infested soils. (c) 2007 Elsevier Ltd. All rights reserved.
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