Cucumber mosaic virus infection as a potential selective pressure on Arabidopsis thaliana populations

Montes Casado, Nuria and Alonso Blanco, Carlos and Garcia-Arenal Rodriguez, Fernando (2019). Cucumber mosaic virus infection as a potential selective pressure on Arabidopsis thaliana populations. "Plos Pathogens", v. 15 (n. 5); p. 1007810. ISSN 1553-7366. https://doi.org/10.1371/journal.ppat.1007810.

Description

Title: Cucumber mosaic virus infection as a potential selective pressure on Arabidopsis thaliana populations
Author/s:
  • Montes Casado, Nuria
  • Alonso Blanco, Carlos
  • Garcia-Arenal Rodriguez, Fernando
Item Type: Article
Título de Revista/Publicación: Plos Pathogens
Date: 28 May 2019
ISSN: 1553-7366
Volume: 15
Subjects:
Faculty: E.T.S. de Ingeniería Agronómica, Alimentaria y de Biosistemas (UPM)
Department: Biotecnología - Biología Vegetal
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

It has been proposed that in wild ecosystems viruses are often plant mutualists, whereas agroecosystems favour pathogenicity. We seek evidence for virus pathogenicity in wild ecosystems through the analysis of plant-virus coevolution, which requires a negative effect of infection on the host fitness. We focus on the interaction between Arabidopsis thaliana and Cucumber mosaic virus (CMV), which is significant in nature. We studied the genetic diversity of A. thaliana for two defence traits, resistance and tolerance, to CMV. A set of 185 individuals collected in 76 A. thaliana Iberian wild populations were inoculated with different CMV strains. Resistance was estimated from the level of virus multiplication in infected plants, and tolerance from the effect of infection on host progeny production. Resistance and tolerance to CMV showed substantial genetic variation within and between host populations, and depended on the virus x host genotype interaction, two conditions for coevolution.Resistance and tolerance were co-occurring independent traits that have evolved independently from related life-history traits involved in adaptation to climate. The comparison of the genetic structure for resistance and tolerance with that for neutral traits (QST/FST analyses) indicated that both defence traits are likely under uniform selection. These results strongly suggest that CMV infection selects for defence on A. thaliana populations, and support plant-virus coevolution. Thus, we propose that CMV infection reduces host fitness under the field conditions of the wild A. thaliana populations studied.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainBFU2015-64018-RUnspecifiedUnspecifiedEvolución de la gama de huéspedes y de la virulencia en la emergencia de virus de plantas
Government of SpainBES-2009-026698UnspecifiedUnspecifiedUnspecified
Government of SpainBIO2016-75754-PUnspecifiedUnspecifiedMecanismos genómicos, moleculares y evolutivos de los patrones de tricomas de las plantas

More information

Item ID: 63661
DC Identifier: http://oa.upm.es/63661/
OAI Identifier: oai:oa.upm.es:63661
DOI: 10.1371/journal.ppat.1007810
Official URL: https://journals.plos.org/plospathogens/article?id=10.1371/journal.ppat.1007810
Deposited by: Memoria Investigacion
Deposited on: 30 Oct 2020 12:06
Last Modified: 01 Nov 2020 08:31
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