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Norway spruce dieback: Occurrence, isolation and biological activity of p‐hydroxy acetophenone and p‐hydroxy acetophenone‐O‐glucoside and their possible roles during stress phenomena
Author(s) -
Hoque E.
Publication year - 1985
Publication title -
european journal of forest pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.535
H-Index - 49
eISSN - 1439-0329
pISSN - 0300-1237
DOI - 10.1111/j.1439-0329.1985.tb00877.x
Subject(s) - acetophenone , apical dominance , shoot , biology , glucoside , picea abies , botany , browning , horticulture , epicotyl , gas chromatography , chromatography , biochemistry , chemistry , catalysis , medicine , alternative medicine , pathology
This paper is an extended form of a short report published previously (Eur. J. For. Path. 14, 1984b). Here, we describe the occurrence, the isolation, the chromatographic comparison, the biological activity, the measurement of concentration of p‐hydroxy acetophenone (p‐HAP) and its O‐glucoside (Picein) by gas chromatography and their possible roles during stress phenomena. The gas chromatographic measurement of p‐HAP and its O‐glucoside (after enzymic hydroluysis) in the current year's shoots and branches showed that the ratio of p‐HAP: p‐HAP‐O‐glucoside is always greater than I in the affected trees and less than I in the healthy trees. The ratio of p‐HAP:p‐HAP‐o‐glucoside was shown to increase with increasing durations of water stress, indicating the involvement of p‐HAP in stress phenomena. p‐HAP was found to be phytotoxic to the 2‐year‐old saplings at a cone, of 500 ppm. p‐HAP caused yellowing and browning of needles, needle‐fall, inhibition of apical dominance (epicotyl, roots) and inhibition of bud‐break in Norway spruce.