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Direct and indirect fluorescent antibody staining ofOphiobolus graminis Sacc. in culture and in the rhizosphere of cereal plants

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Abstract

Fluorescein isothiocyanate (FITC) conjugates were prepared to whole-cell and cell-wall fractions of four cultures ofOphiobolus graminis W1, W2, O1 and O2. Homologous and heterologous direct and indirect FA staining of the four cultures ofO. graminis gave positive staining in all reactions. This indicated that the four cultures could not be differentiated by fluorescent antibody (FA) staining. Species specificity of the conjugates was shown by the staining ofO. graminis hyphae in the rhizosphere of wheat and oat roots. Plant tissues were not stained. Furthermore out of 52 rhizosphere isolates stained with whole-cell and cell-wall conjugates of the four cultures ofO. graminis, only 7 cross-reacted with the whole-cell conjugates whereas none cross-reacted with the cell-wall conjugates.

These results indicate the potentiality of the FA staining technique as a serological tool in localizing, and identifyingO. graminis amongst mixed fungal populations in the rhizosphere of roots.

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Authors and Affiliations

  1. Department of Botany, Monash University, 3168, Clayton, Victoria, Australia

    Y. Sen Choo & A. A. Holland

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  1. Y. Sen Choo
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  2. A. A. Holland
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Choo, Y.S., Holland, A.A. Direct and indirect fluorescent antibody staining ofOphiobolus graminis Sacc. in culture and in the rhizosphere of cereal plants. Antonie van Leeuwenhoek 36, 549–554 (1970). https://doi.org/10.1007/BF02069057

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  • DOI: https://doi.org/10.1007/BF02069057

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