Naslov
Formation of tryptophol galactoside and an unknown tryptophol ester in Euglena gracilis

Autori
Laćan, Goran ; Magnus, Volker ; Jeričević, Biserka ; Kunst, Ljerka ; Iskrić, Sonja

Izvornik
Plant Physiology (0032-0889) 76 (1984), 4; 889-893

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Euglenophyta ; indole metabolism ; auxin biogenesis ; indole-3-ethanol ; 2-(indol-3-yl)ethyl-beta-D-galactopyranoside ; tryptophol acetate and unknown ester

Sažetak
The unicellular alga Euglena gracilis Klebs 'Z' converted exogenous indole-3-ethanol (tryptophol) to two major metabolites: tryptophol galactoside and an unknown compound, and to minor amounts of indole-3-acetic acid, tryptophol acetate, and tryptophol glucoside. The unknown was hydrolyzed to tryptophol by methanolic ammonia and should therefore be a tryptophol ester. The galactoside was identified as 2-(indol-3-yl)ethyl-beta-D-galactopyranoside. This structure was established by comparison with an authentic standard involving chromatographic methods, ultraviolet and mass spectroscopy, enzymic and acid hydrolysis, and identification of galactose in the hydrolysate. By forming tryptophol galactoside, Euglena gracilis differs from the higher plants examined so far, for which the corresponding glucoside is the only sugar conjugate of tryptophol detected.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Biologija

POVEZANOST RADA