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Anther smut pathogens as important drivers of population dynamics of long-lived perennial plants: A case study of Dianthus carthusianorum
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SYSNO ASEP 0572874 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Anther smut pathogens as important drivers of population dynamics of long-lived perennial plants: A case study of Dianthus carthusianorum Author(s) Koupilová, Klára (BU-J) ORCID
Koubek, T. (CZ)
Kasner, M. (CZ)
Janovský, Zdeněk (BU-J) ORCID, RID, SAIArticle number 125729 Source Title Perspectives in Plant Ecology, Evolution and Systematics. - : Elsevier - ISSN 1433-8319
Roč. 59, June (2023)Number of pages 12 s. Language eng - English Country NL - Netherlands Keywords plant population dynamics ; integral projection model ; elasticity ; plant pathogen ; anther smut pathogen ; microbotryum OECD category Ecology R&D Projects LTT20003 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Limited access Institutional support BU-J - RVO:67985939 UT WOS 000989820700001 EID SCOPUS 85151730477 DOI 10.1016/j.ppees.2023.125729 Annotation Pollinator-transmitted pathogens typically hinder sexual reproduction of their hosts and affect pollen flow among remaining healthy individuals in a population. The extent to which a pathogen also influences host's population growth depends on the importance of sexual reproduction for the host's life cycle. Such pathogen impact cannot be traced by measuring only the vital rates directly affected by the pathogen, and thus a study of the host's entire life cycle is necessary. In this study, we aimed to quantify the effects of the pollinator-transmitted anther smut pathogen Microbotryum carthusianorum on population growth rate in three populations of the long-lived peren-nial Dianthus carthusianorum. We followed plant individuals over three years and measured their size, disease state, and reproduction. We then constructed an Integral Projection Model (IPM). To evaluate the pathogen impact, we performed a stochastic analysis of the IPM for real diseased populations as well as for simulated populations without the pathogen. As the populations also hosted predispersal seed predators, the same approach was used to evaluate their impact. Stochastic population growth rates indicated two of the real populations to be increasing, and one to be declining. Comparison with the simulated healthy populations showed that the pathogen impact on the growth rate was negative and relatively strong, because the growth rate was highly sensitive to changes in sexual reproduction. However, the pathogen did not appear to cause the decline in the one decreasing population, since the growth rate there was impaired more substantially by high rates of predispersal seed predation and low germination rates than by the castration of diseased flowers. Overall, our study suggests that D. carthusianorum is highly vulnerable to biotic interactions affecting sexual reproduction pathway. Addi-tionally, our study illustrated several complexities in disease dynamics (e.g., occurrence of partially or fully asymptomatic plants) that need to be incorporated into the assessment of the impact of pollinator-transmitted pathogens on long-lived perennials. Workplace Institute of Botany Contact Martina Bartošová, martina.bartosova@ibot.cas.cz, ibot@ibot.cas.cz, Tel.: 271 015 242 ; Marie Jakšová, marie.jaksova@ibot.cas.cz, Tel.: 384 721 156-8 Year of Publishing 2024 Electronic address https://doi.org/10.1016/j.ppees.2023.125729
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