Variability of enzyme phenotypes in a population of Nacobbus aberrans (Nematoda: Tylenchida) from Còrdoba, Argentina

M. E. Doucet, E. E. Montamat, A. L. Giayetto


Enzymatic variation was evaluated within a population of Nacobbus aberrans from the South of Cordoba, Argentina. Single females extracted from infected roots of quinoa (Chenopodium album) and tomato (Lycopersicon esculentum) were assayed for 15 enzymes by polyacrylamide gel electrophoresis. Of the 15 enzyme systems investigated, only esterases (EST), malate dehydrogenase (MDH), acid phosphatase (AcP), phosphoglucose isomerase (PGI), lactate dehydrogenase (LDH), ~ hydroxibutyrate dehydrogenase (~-BHD), malic enzyme (ME) and mannose phosphate isomerase (MPI) were detected. Seven distinct phenotypes were found in EST. No phenotypic differences in enzyme patterns were observed between females isolated from quinoa and tomato, indicating that the enzymatic variation was not related to the host plant.

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