Serological relationships of some fungi of the genus <i>Pythium</i>

Antisera were prepared to nine species of Pythium and serological interrelationships were investigated using the double diffusion technique in agarose and immunoelectrophoresis. Among the nine species the following groups were distinguishable: P. aphanidermatum and P. butleri appear to be identical and different from the other species investigated. Pythium coloratum and P. dissotocum were closely related to each other but very distantly related to the remaining species. Pythium pyrilobum cross-reacted strongly with the homologous antiserum, and only faintly with other antisera. The last group includes very cross-reactive species: P. debaryanum, P. irregulare, P. mamillatum, P. sylvaticum, and P. ultimum. </jats:p

Serologic Relationship between Inclusion Body Proteins of Some Lepidoptera and Hymenoptera

Summary Guinea pigs were injected with dissolved inclusion body proteins from 16 species of Lepidoptera and Hymenoptera collected from four continents. On the basis of complement fixation tests they proved to belong to three serologically distinct groups. Two of these groups, namely nuclear polyhedron proteins from Lepidoptera and cytoplasmic capsule proteins from Lepidoptera, are the same as previously established for the corresponding viruses, although the capsule protein from Recurvaria milleri Busck (CRm) showed a higher cross reactivity with the polyhedron proteins than with the other capsule proteins. A third group is represented by the nuclear polyhedron proteins of Diprionidae (Hymenoptera). Within each group a varying degree of relationship was found which appears to be influenced by the phylogenetic status of the hosts.</jats:p

Preliminary Results of a Serological Examination of Some Scolytidae and Curculionidae

AbstractThe serological relationships of the larvae of a number of species of bark beetles and weevils were examined. There appeared to be no clear serological separation between the two families as represented by the test species. However, certain relationships indicated in this preliminary study suggest that more extensive testing might be useful in evaluating the current constitution of the families Curculionidae and Scolytidae. In the meantime, it is anticipated that this technique can be useful in several discrete taxonomic problems now being investigated in the family Scolytidae.</jats:p