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Temporal and spatial dispersal of Thekopsora areolata basidiospores, aeciospores, and urediniospores

Zhang, Ke and Kaitera, Juha and Samils, Berit and Olson, Åke (2022). Temporal and spatial dispersal of Thekopsora areolata basidiospores, aeciospores, and urediniospores. Plant Pathology. 71 :3 , 668-683
[Research article]

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Abstract

Cherry spruce rust causes huge yield losses in Norway spruce seed production in Fennoscandia. The causal agent, Thekopsora areolata, has three types of spores that disperse during spring: basidiospores are produced on basidia that grow out from teliospores in overwintered bird cherry leaf litter to infect new pistillate spruce cones, aeciospores are released from old diseased spruce cones to infect bird cherry leaves, and urediniospores are produced from new bird cherry leaves for reinfection. No study has examined the dispersal of T. areolata spores, including the basidiospores that cause primary infection in spruce cones. In this study, teliospores of T. areolata were germinated in the laboratory and the morphology of basidiospores was described. T. areolata spores were sampled in Ultuna, Sweden and Joutsa, Finland with 21 spore traps at each site. Peaks in aeciospores were observed from 11 to 25 May and from 2 to 8 June at the Finnish site, and from 4 to 18 May at the Swedish site. Urediniospores were first observed 2-3 weeks after the peaks in aeciospores and they were mainly distributed within 10 m from the bird cherry trees. Peaks of 1-2 weeks in basidiospore detection coincided with multiple rain events. The basidiospore peak overlapped with the spruce pollen peak in Finland but not in Sweden. The quantities of basidiospores from different spore traps within 100 m from the spore source had no gradient. Information on spatial and temporal spore release is important for making decisions on disease management strategies.

Authors/Creators:Zhang, Ke and Kaitera, Juha and Samils, Berit and Olson, Åke
Title:Temporal and spatial dispersal of Thekopsora areolata basidiospores, aeciospores, and urediniospores
Series Name/Journal:Plant Pathology
Year of publishing :2022
Volume:71
Number:3
Page range:668-683
Number of Pages:16
Publisher:WILEY
ISSN:0032-0862
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution-Noncommercial-No Derivative Works 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Forest Science
Keywords:cherry spruce rust, Picea abies, Prunus padus, spore dispersal, spore trap
URN:NBN:urn:nbn:se:slu:epsilon-p-114455
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-114455
Additional ID:
Type of IDID
DOI10.1111/ppa.13510
Web of Science (WoS)000718139300001
ID Code:27444
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:28 Mar 2022 08:25
Metadata Last Modified:28 Mar 2022 08:31

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