Characterization of pedicel,paper, and larval silk from nest ofPolistes annularis (L.) |
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| Authors: | Karl E Espelie David S Himmelsbach |
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| Affiliation: | (1) Department of Entomology, University of Georgia, 30602 Athens, Georgia;(2) Plant Structure and Composition Research Unit Richard B. Russell Agricultural Research Center Agricultural Research Service, U.S. Department of Agriculture, 30613 Athens, Georgia |
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| Abstract: | The pedicel, nest paper, and larval silk ofPolistes annularis nests were analyzed by high-resolution solid-state 13C]NMR. The pedicel was found to have a high nitrogen content (11%), and the NMR spectra indicated that it is a mixture of carbohydrate and protein. The pedicel protein has an amino acid composition that is very rich in glycine, alanine, serine, and proline (67% of identified residues), similar to that of some insect silks. Solid-state 13C]NMR indicated that the nest paper is composed predominantly of cellulose. Silk, spun by matureP. annularis larvae, was shown by 13C] NMR and amino acid analysis to be a protein very high in serine and alanine (53%), but the amino acid composition is distinct from that of the pedicel protein. |
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| Keywords: | CP/MAS [13C]NMR Hymenoptera Vespidae social wasps Polistes annularis nest pedicel nest paper larval silk scanning electron microscopy |
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