Properties of orb weaving spider glycoprotein glue change during Argiope trifasciata web construction
| Autor: | Sarah D. Stellwagen, Brent D. Opell |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
030110 physiology
0301 basic medicine Toughness Materials science Biophysics lcsh:Medicine complex mixtures Article Viscoelasticity 03 medical and health sciences Adhesives Animals Composite material lcsh:Science Weaving Spinning Glycoproteins Analysis of Variance Spider Multidisciplinary Behavior Animal Ecology biology lcsh:R technology industry and agriculture Spiders Models Theoretical biology.organism_classification 030104 developmental biology Predatory Behavior lcsh:Q Adhesive Material properties Zoology Argiope trifasciata |
| Zdroj: | Scientific Reports, Vol 9, Iss 1, Pp 1-11 (2019) Scientific Reports |
| ISSN: | 2045-2322 |
| DOI: | 10.1038/s41598-019-56707-1 |
| Popis: | An orb web’s prey capture thread relies on its glue droplets to retain insects until a spider can subdue them. Each droplet’s viscoelastic glycoprotein adhesive core extends to dissipate the forces of prey struggle as it transfers force to stiffer, support line flagelliform fibers. In large orb webs, switchback capture thread turns are placed at the bottom of the web before a continuous capture spiral progresses from the web’s periphery to its interior. To determine if the properties of capture thread droplets change during web spinning, we characterized droplet and glycoprotein volumes and material properties from the bottom, top, middle, and inner regions of webs. Both droplet and glycoprotein volume decreased during web construction, but there was a progressive increase in the glycoprotein’s Young’s modulus and toughness. Increases in the percentage of droplet aqueous material indicated that these increases in material properties are not due to reduced glycoprotein viscosity resulting from lower droplet hygroscopicity. Instead, they may result from changes in aqueous layer compounds that condition the glycoprotein. A 6-fold difference in glycoprotein toughness and a 70-fold difference in Young’s modulus across a web documents the phenotypic plasticity of this natural adhesive and its potential to inspire new materials. |
| Databáze: | OpenAIRE |
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