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Author (up) Audigeos, D.; Buonamici, A.; Belkadi, L.; Rymer, P.; Boshier, D.; Scotti-Saintagne, C.; Vendramin, G.G.; Scotti, I. openurl 
  Title Aquaporins in the wild: natural genetic diversity and selective pressure in the PIP gene family in five Neotropical tree species Type Journal Article
  Year 2010 Publication BMC Evolutionary Biology Abbreviated Journal BMC Evol. Biol.  
  Volume 10 Issue Pages 18  
  Abstract Background: Tropical trees undergo severe stress through seasonal drought and flooding, and the ability of these species to respond may be a major factor in their survival in tropical ecosystems, particularly in relation to global climate change. Aquaporins are involved in the regulation of water flow and have been shown to be involved in drought response; they may therefore play a major adaptive role in these species. We describe genetic diversity in the PIP sub-family of the widespread gene family of Aquaporins in five Neotropical tree species covering four botanical families. Results: PIP Aquaporin subfamily genes were isolated, and their DNA sequence polymorphisms characterised in natural populations. Sequence data were analysed with statistical tests of standard neutral equilibrium and demographic scenarios simulated to compare with the observed results. Chloroplast SSRs were also used to test demographic transitions. Most gene fragments are highly polymorphic and display signatures of balancing selection or bottlenecks; chloroplast SSR markers have significant statistics that do not conform to expectations for population bottlenecks. Although not incompatible with a purely demographic scenario, the combination of all tests tends to favour a selective interpretation of extant gene diversity. Conclusions: Tropical tree PIP genes may generally undergo balancing selection, which may maintain high levels of genetic diversity at these loci. Genetic variation at PIP genes may represent a response to variable environmental conditions.  
  Address [Audigeos, Delphine; Belkadi, Laurent; Scotti-Saintagne, Caroline; Scotti, Ivan] INRA, UMR EcoFoG Ecol Forets Guyane 0745, Kourou 97387, French Guiana, Email:  
  Corporate Author Thesis  
  Publisher BIOMED CENTRAL LTD Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1471-2148 ISBN Medium  
  Area Expedition Conference  
  Notes ISI:000280369200002 Approved no  
  Call Number EcoFoG @ eric.marcon @ Serial 47  
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