Loss and resiliency of social amoeba symbiosis under simulated warming.

Autor: Shu L; Environmental Microbiomics Research Center School of Environmental Science and Engineering Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) Sun Yat-sen University Guangzhou China.; Department of Biology Washington University in St. Louis St. Louis MO USA., Qian X; Department of Biology Washington University in St. Louis St. Louis MO USA., Brock DA; Department of Biology Washington University in St. Louis St. Louis MO USA., Geist KS; Department of Biology Washington University in St. Louis St. Louis MO USA., Queller DC; Department of Biology Washington University in St. Louis St. Louis MO USA., Strassmann JE; Department of Biology Washington University in St. Louis St. Louis MO USA.
Jazyk: angličtina
Zdroj: Ecology and evolution [Ecol Evol] 2020 Oct 20; Vol. 10 (23), pp. 13182-13189. Date of Electronic Publication: 2020 Oct 20 (Print Publication: 2020).
DOI: 10.1002/ece3.6909
Abstrakt: Anthropogenic global change is increasingly raising concerns about collapses of symbiotic interactions worldwide. Therefore, understanding how climate change affects symbioses remains a challenge and demands more study. Here, we look at how simulated warming affects the social ameba Dictyostelium discoideum and its relationship with its facultative bacterial symbionts, Paraburkholderia hayleyella and Paraburkholderia agricolaris . We cured and cross-infected ameba hosts with different symbionts. We found that warming significantly decreased D. discoideum's fitness, and we found no sign of local adaptation in two wild populations. Experimental warming had complex effects on these symbioses with responses determined by both symbiont and host. Neither of these facultative symbionts increases its hosts' thermal tolerance. The nearly obligate symbiont with a reduced genome, P. hayleyella , actually decreases D. discoideum's thermal tolerance and even causes symbiosis breakdown. Our study shows how facultative symbioses may have complex responses to global change.
Competing Interests: The authors declare no conflicts of interest.
(© 2020 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd.)
Databáze: MEDLINE
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