Papers by Willibald Schliemann
Metabolic formation and occurrence of gibberellin A1-3-0-β-D-glucopyranoside in immature fruits of Phaseolus coccineus L
Plant Growth Regulation
Identification of native gibberellin-O-glucosides in Zea mays L. and Hordeum vulgare L
Progress in Plant Growth Regulation, 1992
In cereals the induction of a-amylase during germination is claimed to depend on gibberellins (GA... more In cereals the induction of a-amylase during germination is claimed to depend on gibberellins (GAs), e.g. GA3. Nowadays, this view is disputed, because of the low level of endogenous GAs within the caryopses and because of a-amylase induction in the presence of inhibitors of GA biosynthesis (Grosselindemann et al., 1988; Lenton and Appleford, 1991). However, endogenous GA conjugates, which are known to accumulate e.g. in legume seeds during maturation, might serve as a pool of GAs during germination, provided they are present in cereals too, and are hydrolysed during germination to yield free GAs.
p-Hydroxyacetophenone and its β-D-glucopyranoside from shoots of Picea abies
Pharmazie, 1986
Physiology. V, Growth
Progress in botany, 1987
Synthese von 3-O-β-D-Glucopyranosylgibberellin A3-p-brom-phenacylester
Pharmazie, 1984
Partial Characterization of Butanol-Insoluble Metabolites of [3H]GA1 in Maturing Fruits of Phaseolus coccineus L
Biochemie und Physiologie der Pflanzen, 1987
Summary [3H]GA1 fed to maturing fruits of runner beans (Phaseolus coccineus L.) was mainly conver... more Summary [3H]GA1 fed to maturing fruits of runner beans (Phaseolus coccineus L.) was mainly converted to [3H]GA8 and [3H]GA8-2-0-G1c. The butanol-insoluble fraction was found to contain more than 20% of the total radioactivity. The metabolites in this fraction were partly characterized as [3H]GA8-2-0-glucoside and a glucosyl conjugate of a tetra or higher hydroxylated gibberellin using TLC, HPLC, enzvmic methods, and comparison with authentic compounds as well.
Biochemie und Physiologie der Pflanzen, 1984
The different types of phytohormone conjugates are summarized and methods of their enzymic hydrol... more The different types of phytohormone conjugates are summarized and methods of their enzymic hydrolysis are reviewed. These methods are discussed in comparison with hydrolysis procedures under acidic or alkaline conditions.
Investigations on the occurrence of P-Glycosidases in Phaseolus coccineus L
Biochemie und Physiologie der Pflanzen, 1980
Summary Soluble and membrane-associated β-glucosidase from immature fruits, mature seeds, and 6 d... more Summary Soluble and membrane-associated β-glucosidase from immature fruits, mature seeds, and 6 days. old seedlings of Phaseolus coccineus L., cv. “Prize winner” were isolated and partially separated by DEAE-Sephadex A 50-chromatography. The specificity of the enzyme fractions was determined using p-nitrophenyl-β-D-glucopyranoside, cellobiose and gibberellin-0-glucosides. Soluble enzymes. extracts from roots of seedlings germinated in soil showed gibberellin-0-glucoside splitting activity which is thought to be caused by the influence of microorganisms contaminating the root cortex. This assumption is supported by the fact that enzyme extracts from roots without cortex and enzyme extracts from roots of seedlings grown in sterilized saw-dust did not exhibit this specificity. β-Gluco-sidase preparations from cotyledons showed very weak hydrolytic activity against several gibberellin0-glucosides without any remarkable preference of a substrate. Therefore the physiological significance of β-glucosidase responsible for hydrolysis of gibberellin-0-glucosides during germination remains to be elucidated.
Chemischer Informationsdienst, 1984
ChemInform Abstract Das Glucopyranosylgibberellin (I) wird in die Gibberellin-phenacylester (III)... more ChemInform Abstract Das Glucopyranosylgibberellin (I) wird in die Gibberellin-phenacylester (III)übergeführt. Dadurch wird ein wesentlich empfindlicherer Nachweis bei der HPLC-Chromatographie möglich. (IR-, UV-, MS-Daten).
Chemischer Informationsdienst, 1976
ChemInform Abstract Synthese und Pharmakologie von Tiimethroprim (I), einer gegen Bakterien und P... more ChemInform Abstract Synthese und Pharmakologie von Tiimethroprim (I), einer gegen Bakterien und Protozoen wirksamen Verbindung, sowie von Abkömmlingen dieses Typs werden behandelt.
Enzymatic hydrolysis of plumieride to plumieridine
Phytochemistry, 1982
ABSTRACT
β-D-Glucosidasen von Pflanzen und pflanzlichen Zellkulturen
Pharmazie, 1987
Biochemical and Physiological Aspects of Gibberellin Conjugation
Gibberellins, 1991
Conjugation represents part of the metabolism of all groups of plant hormones. The process of con... more Conjugation represents part of the metabolism of all groups of plant hormones. The process of conjugation is characterized by coupling of a plant hormone molecule to another low-molecular-weight component by covalent binding.1,2 Contrary to biosynthetic and other metabolic pathways, conjugation does not exclude reversibility. Plant hormone conjugates differ from the corresponding free hormones with respect to their physical, chemical, and biological properties.3 Though the physiological role of conjugation is not fully understood, it is considered to be involved in the regulation of the biologically active hormone levels as well as in transport and even compartmentation within the cell.
Allantoin from pods of Phaseolus coccineus L
Pharmazie
[Uropepsinogen--determination and diagnostic significance]
Zeitschrift für medizinische Laboratoriumsdiagnostik, 1979
[Beta-D-glucosidases (EC 3.2.1.21) and glucosylceramidases (EC 3.2.1.45) in man]
Die Pharmazie, 1982
[Beta-D-glucosidases (EC 3.2.1.21) of microorganisms. A tabular review]
Die Pharmazie, 1983
[Synthesis of trimethoprim and related compounds. A tabular compilation]
Die Pharmazie, 1976
Biotransformation of a [ 14 CH 3 ]-2-Methylaminobenzophenone by Plant Cell Cultures
Planta Medica, 1987
ABSTRACT
Plant Physiology, 2008
Tailoring carotenoids by plant carotenoid cleavage dioxygenases (CCDs) generates various bioactiv... more Tailoring carotenoids by plant carotenoid cleavage dioxygenases (CCDs) generates various bioactive apocarotenoids. Recombinant CCD1 has been shown to catalyze symmetrical cleavage of C40 carotenoid substrates at 9,10 and 9′,10′ positions. The actual substrate(s) of the enzyme in planta, however, is still unknown. In this study, we have carried out RNA interference (RNAi)-mediated repression of a Medicago truncatula CCD1 gene in hairy roots colonized by the arbuscular mycorrhizal (AM) fungus Glomus intraradices. As a consequence, the normal AM-mediated accumulation of apocarotenoids (C13 cyclohexenone and C14 mycorradicin derivatives) was differentially modified. Mycorradicin derivatives were strongly reduced to 3% to 6% of the controls, while the cyclohexenone derivatives were only reduced to 30% to 47%. Concomitantly, a yellow-orange color appeared in RNAi roots. Based on ultraviolet light spectra and mass spectrometry analyses, the new compounds are C27 apocarotenoic acid derivat...
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Papers by Willibald Schliemann