Tannin sensitivity in larvae ofMalacosoma disstria(Lepidoptera): Roles of the peritrophic envelope and midgut oxidation

Formation of insoluble and colloidally d

Formation of insoluble and colloidally dispersed tannic acid complexes in the midgut fluid of Manduca sexta (Lepidoptera: Sphingidae): An explanation for the failure of tannic acid to cross the peritrophic envelopes of lepidopteran larvae

✍ Raymond V. Barbehenn; Michael M. Martin 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 83 KB

Magnesium and calcium ions, in concentrations comparable to those reported in the midgut fluids of lepidopteran larvae, bring about the precipitation of most of the tannic acid present in simple solutions buffered at pH 8.0 and 10.0, but not at pH 6.5. In contrast, when tannic acid is added to Mandu