ISSN:
1573-6865
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Medicine
Notes:
Summary Two rapid flourescence procedures are described for detecting sulphydryl, disulphide and isothiocyanate groups of scented and pungent principles present in the vacuolar sap of onion, garlic and cabbage. To localize compounds containing sulphydryl groups, fresh or fixed frozen sections of the plants were treated with mercurochrome. After the fluorochromization, strongly-positive sulphydryl sites emitted an intense orange-red fluorescence, while weakly-positive sites emitted a distinctive red-brown fluorescence. Disulphide groups were detected by first reducing with thioglycolic acid to thiol groups before treating with mercurochrome. To effect isothiocyanate localization, frozen sections were exposed to ammonia: isothiocyanates were converted to thioureas and the engendered amino groups were revealed with fluorescamine.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01066532
Permalink
