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Genetic evidence for sexual reproduction and multiple infections of Norway spruce cones by the rust fungus Thekopsora areolata

Capador-Barreto, Hernán Dario and Samils, Berit and Kaitera, Juha and Olson, Åke (2020). Genetic evidence for sexual reproduction and multiple infections of Norway spruce cones by the rust fungus Thekopsora areolata. Ecology and Evolution. 10 , 7389-7403
[Journal article]

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Abstract

Rust fungi are obligate parasites, of plants, with complex and in many cases poorly known life cycles which may include host alteration and up to five spore types with haploid, diploid, and dikaryotic nuclear stages. This study supports thatThekopasora areolata, the causal agent of cherry-spruce rust in Norway spruce, is a macrocyclic heteroecious fungus with all five spore stages which uses two host plantsPrunus padusandPicea abiesto complete its life cycle. High genotypic diversity without population structure was found, which suggests predominantly sexual reproduction, random mating and a high gene flow within and between the populations in Fennoscandia. There was no evidence for an autoecious life cycle resulting from aeciospore infection of pistillate cones that would explain the previously reported rust epidemics without the alternate host. However, within cones and scales identical multilocus genotypes were repeatedly sampled which can be explained by vegetative growth of the fertilized mycelia or repeated mating of mycelium by spermatia of the same genotype. The high genotypic diversity within cones and haplotype inference show that each pistillate cone is infected by several basidiospores. This study provides genetic evidence for high gene flow, sexual reproduction, and multiple infections of Norway spruce cone by the rust fungusT. areolatawhich expands the general understanding of the biology of rust fungi.

Authors/Creators:Capador-Barreto, Hernán Dario and Samils, Berit and Kaitera, Juha and Olson, Åke
Title:Genetic evidence for sexual reproduction and multiple infections of Norway spruce cones by the rust fungus Thekopsora areolata
Year of publishing :2020
Volume:10
Page range:7389-7403
Number of Pages:15
Publisher:John Wiley & Sons Ltd
ISSN:2045-7758
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Keywords:aecia, cherry-spruce rust, cone rust, forest pathology, life cycle, Norway spruce, Picea abies, seed orchard
URN:NBN:urn:nbn:se:slu:epsilon-p-106803
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-106803
Additional ID:
Type of IDID
DOI10.1002/ece3.6466
Web of Science (WoS)000540680100001
ID Code:17407
Faculty:S - Faculty of Forest Sciences
Department:(NL, NJ) > Dept. of Forest Mycology and Plant Pathology
(S) > Dept. of Forest Mycology and Plant Pathology
Deposited By: SLUpub Connector
Deposited On:07 Sep 2020 09:35
Metadata Last Modified:07 Sep 2020 09:35

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