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      SANIDADE, TRANSMISSÃO VIA SEMENTE E PATOGENICIDADE DE FUNGOS EM SEMENTES DE Cedrela fissilis PROCEDENTES DA REGIÃO SUL DO BRASIL Translated title: SANITY, TRANSMISSION VIA SEEDS AND FUNGI PATHOGENICITY IN Cedrela fissilis SEEDS FROM THE SOUTH REGION OF BRAZIL

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          Abstract

          RESUMO Pesquisas relacionadas à patologia de sementes de espécies florestais nativas, especialmente aquelas mais aprofundadas, são escassas. Assim, o objetivo deste estudo foi avaliar a sanidade das sementes de cedro através de dois métodos de detecção, avaliar a transmissão de fungos associados às sementes para as plântulas e avaliar a patogenicidade de fungos associados às sementes e transmitidos para as plântulas. Para tanto, sementes de seis procedências, dentre os estados do Rio Grande do Sul, Santa Catarina e Paraná, foram utilizadas. Estas foram submetidas a testes de sanidade, pelos métodos do papel-filtro e batata-dextrose-ágar (BDA), a teste de transmissão via sementes para as plântulas e a teste de patogenicidade de isolados de Rhizoctonia sp., patógeno escolhido por ser o mais frequente nos testes de sanidade e transmitido via semente. Os fungos encontrados em ambos os testes foram: Pestalotia sp., Rhizoctonia sp., Penicillium sp., Phomopsis sp., Rhizopus sp., Aspergillus sp. e Fusarium sp. Ambos os métodos podem ser utilizados para teste de sanidade em sementes de cedro. Os fungos transmitidos via semente para plântula foram Fusarium sp. e Rhizoctonia sp., sendo que, estes causaram danos nas raízes e posterior tombamento. Foi identificado um isolado de Rhizoctonia sp. patogênico para plântulas de cedro, causando os mesmos sintomas relatados no teste de transmissão.

          Translated abstract

          ABSTRACT Researches about seed pathology of native forest species, especially, those more extensive, are rare. This research aims to evaluate the health of Spanish-cedar seeds through two detection methods, to evaluate the possible transmission of fungi associated to Cedrela fissilis seeds to seedlings and to evaluate the pathogenicity of the fungus transmitted by Cedrela fissilis seeds. For this, seeds from six different locations from Rio Grande do Sul, Santa Catarina and Paraná states were used. The seeds were submitted to sanity tests, by blotter-test and potato-dextrose-agar (PDA) methods, transmission by seeds to the seedlings and to the pathogenicity test of Rhizoctonia sp., chosen because it was common in sanity testing and transmitted by seed. The fungi found in both of the methods were: Pestalotia sp., Rhizoctonia sp., Penicillium sp, Phomopsis sp., Rhizopus sp., Aspergillus sp. and Fusarium sp. Both tests can be used for the sanity test in Cedrela fissilis seeds. The fungi transmitted by seeds to the seedlings were Fusarium sp. and Rhizoctonia sp., both causing problems in roots and subsequent damping-off. One of the isolates of Rhizoctonia sp. was identified as pathogenic to seedlings, causing the same symptoms observed on transmission test.

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          Most cited references 34

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          Clima do Rio Grande do Sul

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            Seed Pathology

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              Patologia de sementes: fundamentos e aplicações

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                cflo
                Ciência Florestal
                Ciênc. Florest.
                Universidade Federal de Santa Maria (Santa Maria, RS, Brazil )
                0103-9954
                1980-5098
                September 2012
                : 22
                : 3
                : 493-503
                Affiliations
                Santa Maria Rio Grande do Sul orgnameUniversidade Federal de Santa Maria orgdiv1Centro de Ciências Rurais Brazil caciaragonzatto@ 123456gmail.com
                Colombo Paraná orgnameEmbrapa Florestas Brazil alvaro@ 123456cnpf.embrapa.br
                Santa Maria Rio Grande do Sul orgnameUniversidade Federal de Santa Maria orgdiv1Centro de Ciências Rurais orgdiv2Departamento de Defesa Fitossanitária Brazil marlovemuniz@ 123456yahoo.com.br
                Santa Maria Rio Grande do Sul orgnameUniversidade Federal de Santa Maria orgdiv1Centro de Ciências Rurais Brazil lilalazarotto@ 123456yahoo.com.br
                Santa Maria Rio Grande do Sul orgnameUniversidade Federal de Santa Maria orgdiv1Centro de Ciências Rurais orgdiv2Departamento de Ciências Florestais Brazil longhi.solon@ 123456gmail.com
                Santa Maria Rio Grande do Sul orgnameUniversidade Federal de Santa Maria orgdiv1Centro de Ciências Rurais Brazil beltrame.rafael@ 123456yahoo.com.br
                Article
                S1980-50982012000300493
                10.5902/198050986617

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

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                Figures: 0, Tables: 0, Equations: 0, References: 34, Pages: 11
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