ISSN:
1573-1561
Keywords:
Allelochemicals
;
no-tillage
;
conventional-tillage
;
soils
;
wheat
;
Triticum aestivum
;
mass spectrometry
;
Petri-dish bioassay
;
fatty acids
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Chemistry and Pharmacology
Notes:
Abstract Putative allelochemicals found in the soil of no-tillage and conventional-tillage wheat plots near Stillwater, Oklahoma, were obtained by a mild alkaline aqueous extraction procedure, bioassayed to determine their biological activity, purified, and analyzed with a capillary gas chromatography-mass spectrometry-data analysis system. The most significant inhibition was found in bioassays of extracts from soil collected immediately after harvest in June, July, and August. No-tillage soils produced significant inhibition during the rest of the year also. Mass spectrometry showed fatty acids as the most abundant compounds. However, when bioassayed authentic samples of the five free fatty acids showed no significant biological activity toward wheat.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01026937
