| Ritschar, S; Kumar, V; Rabus, M; Laforsch, C: Uncovering the chemistry behind inducible morphological defences in the crustacean Daphnia magna via micro-Raman spectroscopy, Scientific Reports, 10 (2020), online: 29.12.2020, doi:10.1038/s41598-020-79755-4 | |
| Abstract: The widespread distribution of Crustacea across every aquatic ecological niche on Earth is enabled due to their exoskeleton's versatile properties. Especially mineralization of the exoskeleton provides protection against diverse environmental threats. Thereby, the exoskeleton of some entomostracans is extremely phenotypically plastic, especially in response to predators. For instance, the freshwater zooplankton Daphnia forms conspicuous inducible morphological defenses, such as helmets, and can increase the stability of its exoskeleton, which renders them less vulnerable to predation. In this study, we reveal for the first time the chemical composition of the exoskeleton of Daphnia magna, using Raman spectroscopy, to be composed of α-chitin and proteins with embedded amorphous calcium carbonate (ACC). Furthermore, we reveal the exoskeleton's chemical changes associated with inducible defense mechanisms in the form of more substantial mineralization, which is probably correlated with enhanced carapace stability. We, therefore, highlight the importance of calcium-biominerals for inducible morphological defenses in Daphnia. |
Aktuelle Termine
Aktuelle Termine
| BayCEER-Kolloquium: |
|---|
| Do. 16.05.2024 Dimethylated thioarsenates: potentially dangerous hidden arsenic species in rice and rice products |
| Dialog: |
| Fr. 17.05.2024 Forum Zukunftswald: Bodenvegetation: Erkennen und deren Bedeutung für den Waldbau |
| Ökologisch-Botanischer Garten: |
| So. 05.05.2024 Führung | Faszination Englische Gärten: Gestaltung und Pflanzen |
| So. 05.05.2024 Midissage | da capo - Ausstellung von Doris Bocka |
| Mi. 15.05.2024 Kurzführung | "Botanische Mittagspause" |