Deciphering the biology of Cryptophyllachora eurasiatica gen. et sp. nov., an often cryptic pathogen of an allergenic weed, Ambrosia artemisiifolia

Kiss, Levente and Kovacs, Gabor M. and Boka, Karoly and Bohar, Gyula and Boharne, Krisztina Varga and Nemeth, Mark Z. and Takamatsu, Susumu and Shin, Hyeon-Dong and Hayova, Vera and Nischwitz, Claudia and Seier, Marion K. and Evans, Harry C. and Cannon, Paul F. and Ash, Gavin James and Shivas, Roger G. and Muller-Scharer, Heinz (2018) Deciphering the biology of Cryptophyllachora eurasiatica gen. et sp. nov., an often cryptic pathogen of an allergenic weed, Ambrosia artemisiifolia. Scientific Reports, 8 (10806). pp. 1-14.

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A little known, unculturable ascomycete, referred to as Phyllachora ambrosiae, can destroy the inflorescences of Ambrosia artemisiifolia, an invasive agricultural weed and producer of highly allergenic pollen. The fungus often remains undetectable in ragweed populations. This work was conducted to understand its origin and pathogenesis, a prerequisite to consider its potential as a biocontrol agent. The methods used included light and transmission electron microscopy, nrDNA sequencing, phylogenetic analyses, artificial inoculations, and the examination of old herbarium and recent field specimens from Hungary, Korea, Ukraine and USA. The Eurasian and the North American specimens of this fungus were to represent two distinct, although closely related lineages that were only distantly
related to other lineages within the Ascomycota. Cnsequently, we describe a new genus that includes Cryptophyllachora eurasiatica gen. et sp. nov. and C. ambrosiae comb. nov., respectively. The pathogenesis of C. eurasiatica was shown in A. artemisiifolia. No evidence was found for either seedborne transmission or systemic infection. Two hypotheses were developed to explain the interaction between C. eurasiatica and A. artemisiifolia: (i) as yet undetected seed-borne transmissions and latent, systemic infections; or (ii) alternative hosts.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to Published version, in accordance with the copyright policy of the publisher.
Faculty / Department / School: Current - Institute for Agriculture and the Environment
Date Deposited: 25 Jul 2018 05:15
Last Modified: 25 Jul 2018 05:15
Uncontrolled Keywords: plant disease, pollen allergy, plant pathogenic fungi, molecular phylogeny, taxonomy, transmission electron microscopy
Fields of Research : 06 Biological Sciences > 0605 Microbiology > 060505 Mycology
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970106 Expanding Knowledge in the Biological Sciences
Funding Details:
Identification Number or DOI: 10.1038/s41598-018-29102-5

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