UNIGE document Scientific Article
previous document  unige:32821  next document
add to browser collection
Title

Temperature Alters Host Genotype-Specific Susceptibility to Chytrid Infection

Authors
Gsell, Alena S
de Senerpont Domis, Lisette N.
Van Donk, Ellen
Published in PLOS ONE. 2013, vol. 8, p. e71737
Abstract The cost of parasitism often depends on environmental conditions and host identity. Therefore, variation in the biotic and abiotic environment can have repercussions on both, species-level host-parasite interaction patterns but also on host genotype-specific susceptibility to disease. We exposed seven genetically different but concurrent strains of the diatom Asterionella formosa to one genotype of its naturally co-occurring chytrid parasite Zygorhizidium planktonicum across five environmentally relevant temperatures. We found that the thermal tolerance range of the tested parasite genotype was narrower than that of its host, providing the host with a "cold" and "hot" thermal refuge of very low or no infection. Susceptibility to disease was host genotype-specific and varied with temperature level so that no genotype was most or least resistant across all temperatures. This suggests a role of thermal variation in the maintenance of diversity in disease related traits in this phytoplankton host. The duration and intensity of chytrid parasite pressure on host populations is likely to be affected by the projected changes in temperature patterns due to climate warming both through altering temperature dependent disease susceptibility of the host and, potentially, through en-or disabling thermal host refugia. This, in turn may affect the selective strength of the parasite on the genetic architecture of the host population.
Identifiers
Full text
Article (Published version) (1.9 MB) - public document Free access
Structures
Research groups Microbial Ecology
ISE Pôle Sciences
ISE Biodiversité
ISE Eau
Citation
(ISO format)
GSELL, Alena S et al. Temperature Alters Host Genotype-Specific Susceptibility to Chytrid Infection. In: PLOS ONE, 2013, vol. 8, p. e71737. https://archive-ouverte.unige.ch/unige:32821

143 hits

827 downloads

Update

Deposited on : 2014-01-07

Export document
Format :
Citation style :