ISSN:
1573-1561
Keywords:
Crambe
;
Crambe abyssinica Triticum
;
Sesbania
;
Abutilon
;
Brassicaceae
;
seedmeal
;
glucosinolate
;
epiprogoitrin
;
1-cyano-2-hydroxy-3-butene
;
phytotoxicity
;
soil amendment
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Chemistry and Pharmacology
Notes:
Abstract Crambe (Crambe abyssinica) seedmeal was found to suppress seedling emergence and biomass accumulation when added to a sandy loam soil containing wheat (Triticum aestivum Cardinal) and hemp sesbania (Sesbania exahata) seeds. Hexane, CH2Cl2, MeOH, and water extracts of the seedmeal were prepared and bioassayed against wheat and velvetleaf (Abutilon theophrasti) radicle elongation. The CH2Cl2 extract was the most inhibitory, while the other extracts inhibited the bioassay species only slightly (MeOH) or not at all (hexane, water). Fractionation of the CH2Cl2 extract identified the major phytotoxin as l-cyano-2-hydroxy-3-butene (CHB), comprising 96.1% of the active CH2Cl2 fraction. Radicle elongation of wheat and velvetleaf were inhibited by CHB with I50 values of 2.1 × 10−4 M for wheat and 2.7 × l0−3 M for velvetleaf.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1022362705261
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