ISSN:
1573-1561
Keywords:
Ageratum conyzoides
;
allelopathy
;
volatile oil
;
adverse habitat
;
allelopathic synergism
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Chemistry and Pharmacology
Notes:
Abstract Fresh leaves and volatile oil of the important weed Ageratum conyzoides in south China were highly inhibitory to seedling growth of various cultivated crops, especially in an adverse habitat. The constituents of the volatile oil were analyzed by GC-MS. Eleven components were identified and six main components, precocene I, precocene II, 3,3-dimethyl-5-tert-butylindone, β-caryophyllene, γ-bisabolene, and fenchyl acetate, were isolated by means of column chromatography. Precocene I, precocene II, β-caryophyllene, and 3,3-dimethyl-5-tert-butylindone inhibited seedling growth of acceptor plants. Inhibitory activity of the volatile oil was more intense than that of the pure components. Fenchyl acetate and γ-bisabolene have no inhibitory activity, but when mixed with precocene II, they increased the inhibitory activity to growth of acceptor seedling plants. Experiments show that allelopathic synergism exists among allelochemicals of Ageratum conyzoides.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1020882109682
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