Felix Feistel
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View article: Metabolism of Epoxidised Withanolides by a Generalist and a Specialist Insect Species
Metabolism of Epoxidised Withanolides by a Generalist and a Specialist Insect Species Open
Major secondary metabolites of Physalis plants, epoxidized withanolides, have a potent feeding deterrent and growth inhibitory effect on most herbivorous insects. Caterpillars of the specialist moth species Heliothis (Chloridea) subflexa c…
View article: Progestogens and androgens influence root morphology of angiosperms in a brassinosteroid‐independent manner
Progestogens and androgens influence root morphology of angiosperms in a brassinosteroid‐independent manner Open
SUMMARY Progestogens and androgens are steroids found in a wide range of plants, but little is known about their physiological functions. In this study, we sowed seeds of angiosperms on progestogen‐ and androgen‐containing medium and analy…
View article: Arabidopsis thaliana accumulates dehydroepiandrosterone after infection with phytopathogenic fungi – Effects on plants and fungi
Arabidopsis thaliana accumulates dehydroepiandrosterone after infection with phytopathogenic fungi – Effects on plants and fungi Open
Progestogens and androgens have been found in many plants, but little is known about their physiological function. We used a previously established UPLC-ESI-MS/MS method to analyze progestogen and androgen profiles in fungal infections. He…
View article: Arabidopsis Thaliana Accumulates Dehydroepiandrosterone after Infection with Phytopathogenic Fungi – Effects on Plants and Fungi
Arabidopsis Thaliana Accumulates Dehydroepiandrosterone after Infection with Phytopathogenic Fungi – Effects on Plants and Fungi Open
View article: Occurrence and conversion of progestogens and androgens are conserved in land plants
Occurrence and conversion of progestogens and androgens are conserved in land plants Open
Summary Progestogens and androgens have been found in many plants, but little is known about their biosynthesis and the evolution of steroidogenesis in these organisms. Here, we show that the occurrence and biosynthesis of progestogens and…
View article: Validation of highly sensitive method based on UHPLC-ESI-MS/MS for the quantification of progestogens and androgens in plant material.
Validation of highly sensitive method based on UHPLC-ESI-MS/MS for the quantification of progestogens and androgens in plant material. Open
<p>We prepared a highly sensitive method for the quantification of progestogens and androgens in plant materials. This method is based on UHPLC-ESI-MS/MS. We show here the data used for the method validation. This includes the d…
View article: Validation of highly sensitive method based on UHPLC-ESI-MS/MS for the quantification of progestogens and androgens in plant material.
Validation of highly sensitive method based on UHPLC-ESI-MS/MS for the quantification of progestogens and androgens in plant material. Open
We prepared a highly sensitive method for the quantification of progestogens and androgens in plant materials. This method is based on UHPLC-ESI-MS/MS. We show here the data used for the method validation. This includes the determination o…
View article: Competing beetles attract egg laying in a hawkmoth
Competing beetles attract egg laying in a hawkmoth Open
In nature, plant-insect interactions occur in complex settings involving multiple trophic levels, often with multiple species at each level.1 Herbivore attack of a host plant typically dramatically alters the plant's odor emissi…
View article: Acylated Quinic Acids Are the Main Salicortin Metabolites in the Lepidopteran Specialist Herbivore Cerura vinula
Acylated Quinic Acids Are the Main Salicortin Metabolites in the Lepidopteran Specialist Herbivore Cerura vinula Open
Salicortin is a phenolic glucoside produced in Salicaceae as a chemical defense against herbivory. The specialist lepidopteran herbivorous larvae of Cerura vinula are able to overcome this defense. We examined the main frass constituents o…
View article: Structural investigations of Salicaceae-derived salicylates and their metabolic transformation in the lepidopteran herbivore Cerura vinula
Structural investigations of Salicaceae-derived salicylates and their metabolic transformation in the lepidopteran herbivore Cerura vinula Open
This thesis contributes to the field of Populus (Salicaceae) research and the establishment of Populus as a model organism exploring secondary metabolites responsible for herbivory defense. In species of the Salicaceae family this defense …
View article: Chemical Composition and Antimicrobial Activity of <i>Populus nigra</i> Shoot Resin
Chemical Composition and Antimicrobial Activity of <i>Populus nigra</i> Shoot Resin Open
The chemical composition of Populus nigra shoot resin has been investigated by chromatographic and spectroscopic methods. The analyses resulted in identification of 19 known compounds. The resin exhibited low activity against selected micr…
View article: The Absolute Configuration of Salicortin, HCH-Salicortin and Tremulacin from Populus trichocarpa × deltoides Beaupré
The Absolute Configuration of Salicortin, HCH-Salicortin and Tremulacin from Populus trichocarpa × deltoides Beaupré Open
The absolute configuration of salicortin, HCH-salicortin and tremulacin, isolated from leaves of Populus trichocarpa × deltoides Beaupré, was determined by comparing spectroscopic data of these compounds with those of idescarpin, isolated …