Journal ArticleDOI
Norway spruce die‐back: isolation, biological activity, measurement of concentration of p‐hydroxy acetophenone and its O‐glucoside (Picein) by gas chromatography
TLDR
This short report as a part of a broad work describes the isolation, the biological activity and the measurement of concentration of p-hydroxy acetophenone and its O-gluco-side (picein) by gas chromatography.Abstract:
This short report as a part of a broad work (Eur. J. For. Path. 15, 1985a) describes the isolation, the biological activity and the measurement of concentration of p-hydroxy acetophenone and its O-gluco-side (picein) by gas chromatography. p-hydroxy acetophenone was found to be phytotoxic to the 2-year-old saplings at a conc. of 500 ppm. The gas chromatographic measurement of p-hydroxy aceto-phenone (p-HAP) and its O-glucoside (after enzymic hydrolysis) in the current year's shoot parts showed the ratio p-HAP: p-HAP-O-glucoside always larger than 1 in the affected trees and less than 1 in the healthy trees.read more
Citations
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Journal ArticleDOI
Single and combined effects of continuous and discontinuous O3 and SO2 immission on Norway spruce needles. II: Metabolic changes
TL;DR: The analysis of the cytological effects of SO2, O3 or SO2/O3 exposure on the structure of spruce needles (Picea abies Karst) revealed an extremely high amount of phenolic compounds in the vacuoles of the mesophyll cells of primary needles as discussed by the authors.
Journal ArticleDOI
Phenolic Compounds in Needles of Norway Spruce Trees in Relation to Novel Forest Decline I. Studies on Trees from a Site in the Northern Black Forest
TL;DR: In this paper, the authors measured selected phenolic compounds in needles of Norway spruce trees (Picea abies) from the Black Forest using a HPLC-technique elaborated for serial studies in forest decline research.
Journal ArticleDOI
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
TL;DR: 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 mixture is always greater than I in the affected trees and less thanI in the healthy trees.
Journal ArticleDOI
Histological and biochemical differences of slightly and severely injured spruce needles of two stands in northrhine westphalia
TL;DR: In this article, the authors compared the first and second year needles of Norway spruce trees of a severely polluted stand of the Eggegebirge and a healthy-to-slightly polluted stands of the Rothaargebirges.
Journal ArticleDOI
Picein and piceol concentrations in Norway spruce.
TL;DR: It was shown that the picein concentration was dependent on the site and the provenance of the trees, and no effects were observed by normal treatment with the herbicides atrazine, glyphosate, and hexazinone, or by drought.
References
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Über die Erkrankung der Fichte (Picea abies Karst.) in den Hochlagen des Bayerischen Waldes
TL;DR: In den hoheren Lagen des Bayerischen Waldes oberhalb etwa 1000 m uber NN tritt in Fichtenbestanden aller Altersklassen extremer Magnesiummangel auf.
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Regulation of enzymic oxidation of indole-3-acetic acid by phenols: Structure-activity relationships
TL;DR: The number of hydroxyl groups and their position relative to each other and the nature and position of other substituents on the aromatic ring were found to affect the activity of mono- and diphenols.
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Biological activity of some conjugated gibberellins.
G. Sembdner,E. Borgmann,G. Schneider,H.-W. Liebisch,Otto Miersch,G. Adam,M. Lischewski,K. Schrefber +7 more
TL;DR: It is concluded that the activity of GA conjugates as measured in different bioassays is based upon the ability of plant enzymes and possibly of certain microorganisms to hydrolyze glucosidic, glucosyl ester, and amide-like linkages.
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Erste Ergebnisse einer botanischen Inventur des “Fichtensterbens”
TL;DR: In this article, a deutlich gestortes Feinwurzelanteil, ein reduziertes Reproduktionsvermogen and eine gestorte Mykorrhizierung is presented.
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Endogenous gibberellins and inhibitors in caryopses of rye
TL;DR: Gibberellins A 8, A 16, A 24, and abscisic acid were identified by GC-MS of derivatized extracts from immature fruits of Secale cereale and free GA, afforded by enzymatic hydrolysis of the conjugate, was chromatographically identified as GA 16.