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Plos One : Aphid Gel Saliva ; Sheath Structure, Protein Composition and Secretory Dependence on Stylet-tip Milieu, Volume 7

By Hong, Wanjin

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Book Id: WPLBN0003933944
Format Type: PDF eBook :
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Reproduction Date: 2015

Title: Plos One : Aphid Gel Saliva ; Sheath Structure, Protein Composition and Secretory Dependence on Stylet-tip Milieu, Volume 7  
Author: Hong, Wanjin
Volume: Volume 7
Language: English
Subject: Journals, Science, Medical Science
Collections: Periodicals: Journal and Magazine Collection
Historic
Publication Date:
Publisher: Plos

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Hong, W. (n.d.). Plos One : Aphid Gel Saliva ; Sheath Structure, Protein Composition and Secretory Dependence on Stylet-tip Milieu, Volume 7. Retrieved from http://netlibrary.net/


Description
Description : In order to separate and analyze saliva types secreted during stylet propagation and feeding, aphids were fed on artificial diets. Gel saliva was deposited as chains of droplets onto Parafilm membranes covering the diets into which watery saliva was secreted. Saliva compounds collected from the diet fluid were separated by SDS-PAGE, while non-soluble gel saliva deposits were processed in a novel manner prior to protein separation by SDS-PAGE. Soluble (watery saliva) and nonsoluble (gel saliva) protein fractions were significantly different. To test the effect of the stylet milieu on saliva secretion, aphids were fed on various diets. Hardening of gel saliva is strongly oxygen-dependent, probably owing to formation of sulfide bridges by oxidation of sulphydryl groups. Surface texture of gel saliva deposits is less pronounced under lowoxygen conditions and disappears in dithiothreitol containing diet. Using diets mimicking sieve-element sap and cell-wall fluid respectively showed that the soluble protein fraction was almost exclusively secreted in sieve elements while nonsoluble fraction was preferentially secreted at cell wall conditions. This indicates that aphids are able to adapt salivary secretion in dependence of the stylet milieu.

 

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