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Journal of General Plant Pathology

, Volume 85, Issue 1, pp 72–78 | Cite as

Detection of Pythium porphyrae infecting Philippine Pyropia acanthophora based on morphology and nuclear rRNA internal transcribed spacer sequences

  • Richard V. Dumilag
Disease Note
  • 78 Downloads

Abstract

Outbreaks of Pythium porphyrae, a fungus that causes red rot disease can devastate nori production, but studies have focused on the occurrence of P. porphyrae from cultivated hosts compared with the wild ones. An unexpected encounter of P. porphyrae infecting the wild nori seaweed, Pyropia acanthophora, collected from the Philippines prompted the present study. The definitive morphological diagnoses of P. porphyrae infection based from the previous reports were similar to those obtained here. Phylogenetic and haplotype analyses of nuclear rRNA internal transcribed spacer sequences confirmed that the pathogen infecting the Philippine Py. acanthophora can be assigned to P. porphyrae.

Keywords

Fungal pathogen Nori Nuclear rRNA ITS Pythium porphyrae Pyropia acanthophora 

Notes

Acknowledgements

I thank Z. Aguinaldo for field and laboratory assistance. R. Andres, C. Abiva, and C. Ame of the BFAR-RO2 organized the collection trip in Claveria, Cagayan. The comments from two anonymous reviewers are greatly acknowledged. Additional comments and edits from B. E. Hazen greatly improved the quality of the manuscript. Support was provided by the Far Eastern University, University Research Center (FEU-URC) and by a grant from the Philippine Council for Agriculture, Aquatic and Natural Resources Research and Development (DOST-PCAARRD) Science Education Institute through an Accelerated Science and Technology Human Resources Development Program (DOST-SEI ASTHRDP).

Compliance with ethical standards

Conflict of interest

The author declares that he has no conflict of interest.

Ethical standards

This article does not contain any studies with human participants or animals performed by the author.

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Copyright information

© The Phytopathological Society of Japan and Springer Japan KK, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Biological Sciences, Institute of Arts and SciencesFar Eastern UniversityManilaPhilippines

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