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Revista Brasileira de Sementes

versão impressa ISSN 0101-3122

Resumo

SA, Danila Alves Corrêa de et al. Transport, pathogenicity and transmissibility of fungi associated with physic nut seeds. Rev. bras. sementes [online]. 2011, vol.33, n.4, pp.663-670. ISSN 0101-3122.  http://dx.doi.org/10.1590/S0101-31222011000400008.

The objective of the present study was to determine the transport rate of a fungus population associated with Jatropha curcas seeds and the pathogenicity of these microrganisms to seedlings and fruit and also the fruit-seed and seed-seedling transmissibility. The transport rate of seeds produced in Minas Gerais, São Paulo, Bahia and Tocantins states was evaluated using the blotter test. The seeds were submitted to the following treatments: without disinfestation, with tegument (SDCT), without disinfestation, without tegument (SDST), with disinfestation, with tegument (CDCT) and with disinfestations, without tegument (CDST). The incidence (%) of the fungi was assessed using a binocular stereomicroscope. Suspensions of 106 spores and PDA discs with mycelium were inoculated for the pathogenicity tests on seedlings and fruits, respectively. For the phytopathogenic fungi, the fruit-seed and seed-seedling transmissibility were evaluated. The SDCT treatment allowed the detection of a greater number of fungi. The identified fungi were Colletotrichum gloeosporioides, C. capsici, Curvularia sp., Verticillium sp., Fusarium sp., Penicillium sp., Aspergillus sp., A. Niger, Rhizopus sp. Only the Colletotrichum species is pathogenic to seedlings and fruit. For both species there is fruit-seed transmissibility but no seed-seedling transmission.

Palavras-chave : Jatropha curcas L; seed pathology.

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