PMID- 26945667 OWN - NLM STAT- MEDLINE DCOM- 20170525 LR - 20181202 IS - 1365-294X (Electronic) IS - 0962-1083 (Print) IS - 0962-1083 (Linking) VI - 25 IP - 10 DP - 2016 May TI - Transcriptomic differences between euryhaline and stenohaline malaria vector sibling species in response to salinity stress. PG - 2210-25 LID - 10.1111/mec.13609 [doi] AB - Evolution of osmoregulatory systems is a key factor in the transition of species between fresh- and saltwater habitats. Anopheles coluzzii and Anopheles merus are stenohaline and euryhaline malaria vector mosquitoes belonging to a larger group of sibling species, the Anopheles gambiae complex, which radiated in Africa within the last 2 million years. Comparative ecological genomics of these vector species can provide insight into the mechanisms that permitted the rapid radiation of this species complex into habitats of contrasting salinity. Here, we use RNA-Seq to investigate gene expression differences between An. coluzzii and An. merus after briefly exposing both young and old larval instars of each species to either saltwater (SW) or freshwater (FW). Our study aims to identify candidate genes and pathways responsible for the greater SW tolerance of An. merus. Our results are congruent with the ability of gene induction to mediate salinity tolerance, with both species showing increasing amounts of differential gene expression between SW and FW as salt concentrations increase. Besides ion transporters such as AgAE2 that may serve as effectors for osmoregulation, we also find mitogen-activated protein kinases that may serve in a phosphorylation signalling pathway responding to salinity, and report potential cross-talk between the mosquito immune response and osmoregulation. This study provides a key step towards applying the growing molecular knowledge of these malaria vectors to improve understanding of their ecological tolerances and habitat occupancy. CI - (c) 2016 John Wiley & Sons Ltd. FAU - Uyhelji, Hilary A AU - Uyhelji HA AD - Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, 46556, USA. AD - Eck Institute for Global Health, University of Notre Dame, Notre Dame, IN, 46556, USA. AD - Functional Genomics Team, Civil Aerospace Medical Institute, Federal Aviation Administration, Oklahoma City, OK, 73169, USA. FAU - Cheng, Changde AU - Cheng C AD - Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, 46556, USA. AD - Eck Institute for Global Health, University of Notre Dame, Notre Dame, IN, 46556, USA. FAU - Besansky, Nora J AU - Besansky NJ AD - Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, 46556, USA. AD - Eck Institute for Global Health, University of Notre Dame, Notre Dame, IN, 46556, USA. LA - eng GR - R21 AI101459/AI/NIAID NIH HHS/United States PT - Journal Article DEP - 20160331 PL - England TA - Mol Ecol JT - Molecular ecology JID - 9214478 SB - IM MH - Africa MH - Animals MH - Anopheles/*genetics/physiology MH - Ecosystem MH - Fresh Water MH - Insect Vectors/genetics/physiology MH - Larva/genetics/physiology MH - *Salinity MH - *Salt Tolerance MH - *Transcriptome PMC - PMC4877251 MID - NIHMS766799 OTO - NOTNLM OT - Anopheles merus OT - c-Jun N-terminal kinase OT - gene expression reaction norm OT - osmoregulation OT - saltwater tolerance OT - transporters EDAT- 2016/03/08 06:00 MHDA- 2017/05/26 06:00 PMCR- 2017/05/01 CRDT- 2016/03/07 06:00 PHST- 2014/07/07 00:00 [received] PHST- 2016/01/09 00:00 [revised] PHST- 2016/02/22 00:00 [accepted] PHST- 2016/03/07 06:00 [entrez] PHST- 2016/03/08 06:00 [pubmed] PHST- 2017/05/26 06:00 [medline] PHST- 2017/05/01 00:00 [pmc-release] AID - 10.1111/mec.13609 [doi] PST - ppublish SO - Mol Ecol. 2016 May;25(10):2210-25. doi: 10.1111/mec.13609. Epub 2016 Mar 31.