Revista Brasileira de Fruticultura ()

FIRST REPORT OF Phytophthora nicotianae CAUSING ROOT ROT OF SOURSOP IN NORTHEASTERN BRAZIL

  • JAQUELINE FIGUEREDO DE OLIVEIRA COSTA,
  • IRAÍLDES PEREIRA ASSUNÇÃO,
  • GAUS SILVESTRE DE ANDRADE LIMA,
  • MARIA DE FÁTIMA SILVA MUNIZ,
  • EDNA DORA MARTINS NEWMAN LUZ

DOI
https://doi.org/10.1590/0100-29452016048
Journal volume & issue
Vol. 38, no. 3

Abstract

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ABSTRACT In 2013, soursop trees showing symptoms of root rot were observed in a field in Maceió, state of Alagoas, Brazil. It was isolated Phytophthora sp. which pathogenicity was confirmed in the host seedlings. Morphological and physiological characteristics in carrot-agar modified medium were consistent with Phytophthora nicotianae description. The PCR sequences products obtained with ITS1/ITS4 primers were compared to sequences of ribosomal DNA of Phytophthora species from the GenBank database observing high identity with other P. nicotianae isolates. A phylogenetic tree was performed to compare the isolate with other sequences of P. nicotianae, which clustering has been verified with 99% of bootstrap, confirming the morphophysiological studies. This is the first report of this pathogen on annonaceous plants in the Northeastern Brazil.

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