A pathogen of New Zealand Pyropia plicata (Bangiales, Rhodophyta), Pythium porphyrae (Oomycota)
journal contribution
posted on 2020-08-23, 22:30 authored by N Diehl, GH Kim, Giuseppe ZuccarelloGiuseppe Zuccarello© 2017 The Korean Society of Phycology. Geographic distributions of pathogens are affected by dynamic processes involving host susceptibility, availability and abundance. An oomycete, Pythium porphyrae, is the causative agent of red rot disease, which plagues Pyropia farms in Korea and Japan almost every year and causes serious economic damage. We isolated an oomycete pathogen infecting Pyropia plicata from a natural population in Wellington, New Zealand. The pathogen was identified as Pythium porphyrae using cytochrome oxidase subunit 1 and internal transcribed spacer of the rDNA cistron molecular markers. Susceptibility test showed that this Pythium from New Zealand was able to infect several different species and genera of Bangiales including Pyropia but is not able to infect their sporophytic (conchocelis) phases. The sequences of the isolated New Zealand strain were also identical to Pythium chondricola from Korea and the type strain from the Netherlands. Genetic species delimitation analyses found no support for separating P. porphyrae from P. chondricola, nor do we find morphological characters to distinguish them. We propose that Pythium chondricola be placed in synonymy with P. porphyrae. It appears that the pathogen of Pyropia, both in aquaculture in the northern hemisphere and in natural populations in the southern hemisphere is one species.
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Preferred citation
Diehl, N., Kim, G. H. & Zuccarello, G. C. (2017). A pathogen of New Zealand Pyropia plicata (Bangiales, Rhodophyta), Pythium porphyrae (Oomycota). Algae, 32(1), 29-39. https://doi.org/10.4490/algae.2017.32.2.25Publisher DOI
Journal title
AlgaeVolume
32Issue
1Publication date
2017-01-01Pagination
29-39Publisher
The Korean Society of PhycologyPublication status
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1226-2617eISSN
2093-0860Language
enUsage metrics
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Keywords
BangiaBangialesDNA barcodinghost specificityPorphyraPythium chondricolaRhodophytaspecies delimitationsynonymizationtaxonomyScience & TechnologyLife Sciences & BiomedicinePlant SciencesMarine & Freshwater BiologyNUCLEOTIDE-SEQUENCE ANALYSISRED ROT DISEASESPECIES DELIMITATIONPHYLOGENETIC-RELATIONSHIPSYEZOENSIS RHODOPHYTAMOLECULAR PHYLOGENYGENUS SAPROLEGNIAALGAL DISEASESSEA FARMSKOREAPlant Biology
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