2011
DOI: 10.1590/s0100-54052011000300002
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Caracterização morfofisiológica e análise de PCR-SSCP de isolados de Phytophthora da acácia-negra na região Sul do Brasil

Abstract: O objetivo do trabalho foi caracterizar isolados de Phytophthora da acácia-negra (Acacia mearnsii) provenientes do Sul do Brasil, com base em características fenotípicas tais como morfologia, crescimento micelial, características das culturas, compatibilidade sexual e patogenicidade, e em perfis de polimorfismo de conformação de fita simples (SSCP = Single Strand Conformation Polymorphism) da região ITS-gene 5.8S do rDNA. Os isolados apresentaram esporângios com papilas proeminentes, arranjo dos esporângios ir… Show more

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“…Phytophthora frigida is not easily distinguished from P. nicotianae by morphological characteristics, because both produce papillate, persistent, ovoid sporangia, and are heterothallic with amphigynous antheridia. Many isolates of P. frigida may have been classified as P. nicotianae until 2007, since the occurrence of this was long associated with gummosis in black wattle (Alves et al 2011). They can be separated by molecular analysis of the ITS region, putting P. frigida in Clade 2 and P. nicotianae in Clade 1.…”
Section: Distinguishing Characteristics For Identificationmentioning
confidence: 99%
“…Phytophthora frigida is not easily distinguished from P. nicotianae by morphological characteristics, because both produce papillate, persistent, ovoid sporangia, and are heterothallic with amphigynous antheridia. Many isolates of P. frigida may have been classified as P. nicotianae until 2007, since the occurrence of this was long associated with gummosis in black wattle (Alves et al 2011). They can be separated by molecular analysis of the ITS region, putting P. frigida in Clade 2 and P. nicotianae in Clade 1.…”
Section: Distinguishing Characteristics For Identificationmentioning
confidence: 99%