Fungi Association with Cedar’s Seeds and Fusarium sp. and Pestalotia sp. Pathogenicities

• Author(s): Benetti, Sílvia Cristina ; Santos, Álvaro Figueredo dos ; Medeiros, Antonio Carlos de Souza ; Jaccoud Filho, David de Souza
• Date: 2010
• Origin: Oasisbr
• Subject(s): Forest seed; Cedrella fissilis; Sementes florestais; Cedrella fissilis
• Document Type: Journal article
• Language: Portuguese

Description

This research had as main objectives the evaluation of cedar’s seeds seed-borne fungi and the Fusariumsp. and Pestalotia sp. pathogenicities. For the fungi detection Potato Dextrose and Agar medium and Blottertest methods were used. For the pathogenicity tests, isolates of Fusarium sp. and Pestalotia sp. were used. The following fungi were observed: Pestalotia sp., Fusarium sp., Phomopsis sp., Colletotrichum sp., Macrophomina sp. and Cladosporium sp. The fungi observed in the highest frequencies were: Fusarium sp., Phomopsis sp. and Pestalotia sp. A reduction of the germination level was observed in seedlings from cedar’s seed inoculated with Fusarium sp. doi: 10.4336/2009.pfb.58.81

Este trabalho teve por objetivos avaliar fungos em sementes de cedro e testar a patogenicidade de Fusarium sp. e Pestalotia sp. Para detecção de fungos, foram utilizados batata-dextrose-ágar e papel filtro. Para o teste de patogenicidade, utilizaram-se isolados de Fusarium sp. e de Pestalotia sp. Foi constatada a presença dos seguintes fungos nas sementes: Pestalotia sp., Fusarium sp., Phomopsis sp., Colletotrichum sp., Macrophomina sp. e Cladosporium sp. Os fungos de maior freqüência foram: Fusarium sp., Phomopsis sp. e Pestalotia sp. Observou-se decréscimo nos valores de emergência das plântulas oriundas das sementes inoculadas com Fusarium sp. Doi: 10.4336/2009.pfb.58.81