Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Effect of Biodiversity Changes in Disease Risk: Exploring Disease Emergence in a Plant-Virus System
Year:2012
Research Areas
  • Viral pathogens of plants,
  • Causes and mechanisms of loss,
  • Crop production
Information
Abstract
The effect of biodiversity on the ability of parasites to infect their host and cause disease (i.e. disease risk) is a major question in pathology, which is central to understand the emergence of infectious diseases, and to develop strategies for their management. Two hypotheses, which can be considered as extremes of a continuum, relate biodiversity to disease risk: One states that biodiversity is positively correlated with disease risk (Amplification Effect), and the second predicts a negative correlation between biodiversity and disease risk (Dilution Effect). Which of them applies better to different host-parasite systems is still a source of debate, due to limited experimental or empirical data. This is especially the case for viral diseases of plants. To address this subject, we have monitored for three years the prevalence of several viruses, and virus-associated symptoms, in populations of wild pepper (chiltepin) under different levels of human management. For each population, we also measured the habitat species diversity, host plant genetic diversity and host plant density. Results indicate that disease and infection risk increased with the level of human management, which was associated with decreased species diversity and host genetic diversity, and with increased host plant density. Importantly, species diversity of the habitat was the primary predictor of disease risk for wild chiltepin populations. This changed in managed populations where host genetic diversity was the primary predictor. Host density was generally a poorer predictor of disease and infection risk. These results support the dilution effect hypothesis, and underline the relevance of different ecological factors in determining disease/infection risk in host plant populations under different levels of anthropic influence. These results are relevant for managing plant diseases and for establishing conservation policies for endangered plant species.
International
Si
JCR
Si
Title
Plos Pathogens
ISBN
1553-7366
Impact factor JCR
9,127
Impact info
Volume
8
10.1371/journal.ppat.1002796
Journal number
From page
e1002896
To page
e1002796
Month
SIN MES
Ranking
Participants
  • Autor: Jesus Israel Pagan Muñoz (UPM)
  • Autor: Pablo González-Jara (UPM)
  • Autor: Alejandra Moreno-Letelier (Universidad Nacilnal Autónoma de Mexico)
  • Autor: Manuel Alfredo Rodelo Urrego (UPM)
  • Autor: Aurora Fraile Perez (UPM)
  • Autor: Daniel Piñero (Universidad Nacional Autonoma de Mexico)
  • Autor: Fernando Garcia-Arenal Rodriguez (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Patología Vegetal
  • Centro o Instituto I+D+i: Centro de Biotecnología y Genómica de Plantas, CBGP
  • Departamento: Biotecnología
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