Presence of sporangia of Frankia in the rhizosphere of Discaria (Rhamnaceae) |
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Authors: | M S Cusato R D Tortosa |
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Institution: | (1) Departamento de Ecología, Facultad de Agronomía, Universidad de Buenos Aires, Av. San Martín 4453, 1417 Buenos Aires, Argentina |
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Abstract: | Discaria trinervis and Discaria americana are native actinorhizal plants in Argentina. Discaria seedlings growing in N-free liquid culture, inoculated with dry soils, developed Frankia colonies in the rhizosphere. The occurrence of hyphae, vesicles and sporangia characteristic of Frankia are described in these colonies. The presence of sporangia of Frankia has previously neither been reported in the genus Discaria, nor in the other genera of the tribe Colletieae inside root nodules or outside roots. The infective capacity of the colonies has been demonstrated. |
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Keywords: | actinorhizal plants Discaria sp Frankia Rhamnaceae soil inoculum sporangia |
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