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Subject Keyword BASIC BIOLOGICAL SCIENCES ♦ FUNGI ♦ LABELLING ♦ GLUCOSE ♦ TISSUE DISTRIBUTION ♦ UPTAKE ♦ AUTORADIOGRAPHY ♦ INFECTIVITY ♦ LEAVES ♦ PARASITES ♦ PLANT DISEASES ♦ PLANTS ♦ SPORES ♦ TRITIUM COMPOUNDS ♦ ALDEHYDES ♦ CARBOHYDRATES ♦ DISTRIBUTION ♦ HEXOSES ♦ LABELLED COMPOUNDS ♦ MONOSACCHARIDES ♦ ORGANIC COMPOUNDS ♦ SACCHARIDES ♦ Metabolism- Tracer Techniques
Abstract Digitaria eriantha pentzii was fed /sup 3/H-glucose prior to inoculation with uredospores of Puccinia digitariae Pole Evans. Twenty-one hours after inoculation, uptake of label from /sup 3/H-glucose by the primary infection structures of P. digitariae was demonstrated employing autoradiography. These results indicate that an exchange of nutrients between host and pathogen occurs very early on in the infection process, during the formation of the primary infection structures. Despite contrary reports that obligate parasites receive no nutrition before establishment of haustoria, this study supports the work of Andrews, who demonstrated uptake of /sup 3/H-glucose label from lettuce cotyledons into the primary and secondary infection vesicles, appressoria, and germ tubes of Bremia lactucae.
Educational Use Research
Learning Resource Type Article
Publisher Date 1985-08-01
Publisher Place United States
Journal J. Histochem. Cytochem.
Volume Number 8
Organization Univ. of the Witwatersrand, Johannesburg, South Africa


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