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7. New sundew quinone and emergence data

Author

Schlauer, Jan, Hartmeyer, Siegfried R H, Hartmeyer, Irmgard, Hennern, Holger, Hennern, Anja, and Harvard University Botany Libraries

Published
2019

8. Sundew chemistry and emergence updates

Author

Schlauer, Jan, Hartmeyer, Siegfried R H, Hartmeyer, Irmgard, Hennern, Holger, Hennern, Anja, and Harvard University Botany Libraries

Published
2018

16. REVIEW: A GREENHORN NATURALIST IN BORNEO.

Author

HARTMEYER, SIEGFRIED R. H.

Abstract

"A Greenhorn Naturalist in Borneo" is a book written by Hans Breuer, a German citizen living in Taiwan, who moved to Sarawak, Malaysia with his family to explore the flora and fauna of Borneo. The book covers his nine-year journey through the ancient rainforests, focusing on his encounters with carnivorous pitcher plants and snakes, as well as other fascinating creatures. Breuer also discusses the delicate issue of locals trading wild animals and plants, highlighting the impact on biodiversity. The book is praised for its enjoyable reading experience, subtle humor, and scientific approach, with contributions from naturalist Chien Lee and stunning photographs. [Extracted from the article]

Published
2024
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19. Contrasting Dihydronaphthoquinone Patterns in Closely Related Drosera (Sundew) Species Enable Taxonomic Distinction and Identification

Author

Schlauer, Jan, Hartmeyer, Siegfried R. H., Hartmeyer, Irmgard, Seppänen-laakso, Tuulikki, and Rischer, Heiko

Subjects
chemotaxonomy, drosera, naphthoquinones, QK1-989, Botany, droseraceae, Drosera
Abstract

Dihydronaphthoquinones are described as constituents of sundews (Drosera), Venus flytraps (Dionaea), and dewy pines (Drosophyllum) for the first time. As in the corresponding naphthoquinones, these reduced derivatives may occur in two regio-isomeric series distinguished by the relative position of a methyl group (at position 2 or 7 in the naphthalene skeleton), depending on the taxon. Species producing plumbagin (2-methyljuglone, 1) do commonly contain the corresponding dihydroplumbagin (5), while species containing ramentaceone (7-methyljuglone, 2) also contain dihydroramentaceone (7-methyl-β-dihydrojuglone, 6). So far, only few species containing plumbagin (1) and dihydroplumbagin (5) additionally form dihydroramentaceone (6) but not ramentaceone (2). Thus, subtle but constant differences in the chemism of closely related and morphologically similar species reliably define and distinguish taxa within D. sect. Arachnopus, which is taken to exemplify their chemotaxonomic utility. The joint presence of quinones and hydroquinones allows observations and predictions on the chemical structures and the reactions of these intriguing natural products.

Published
2021

30. CATAPULTS INTO A DEADLY TRAP: THE UNIQUE PREY CAPTURE MECHANISM OF DROSERA GLANDULIGERA.

Author

HARTMEYER, SIEGFRIED R. H., HARTMEYER, IRMGARD, MASSELTER, TOM, SEIOEL, ROBIN, SPECK, THOMAS, and POPPINGA, SIMON

Abstract

The article examines the prey capture mechanism of the carnivorous plant Pimpernel Sundew (Drosera glanduligera Lehm.). It describes the cultivation of Drosera glanduligera. It also outlines the flowering, seed production and seed morphology of the plant. An experiment on the prey capture mechanism of the plant, using common fruit-flies (Drosophila melanogaster), is highlighted.

Published
2013
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