Host-plant oligosaccharins in the honeydew ofSchizaphis graminum (Rondani) (Insecta,Aphididae) |
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| Authors: | B C Campbell |
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| Institution: | (1) Western Regional Research Center, Agricultural Research Service, US Department of Agriculture, 94710 Albany, California, USA |
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| Abstract: | Summary The honeydew of the aphidSchizaphis graminum (Rondani) contains hetero-oligosaccharides (mol. wt>2200 D) having neutral sugar and uronic acid compositions similar to the pectic substances of the host plant,Sorghum biocolor (L.) Moench. These oligosaccharides are pectic fragments which result from the depolymerization of pectic substances in the phloem by aphid salivary polysaccharases. |
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| Keywords: | Aphids honeydew phloem pectin pectinase polysaccharase cell wall translocation phytoalexin |
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