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SUMMARY:Genetic variation of symbiosis-associated phosphate transporter (P
 HT1) genes in maize   - Clement Quan
DTSTART:20140613T123000Z
DTEND:20140613T125500Z
UID:TALK51414@talks.cam.ac.uk
CONTACT:Megan Cooper
DESCRIPTION:The inherent genetic diversity of maize provides a powerful ma
 terial for allele mining associated with traits of interest (Buckler et al
 .\, Curr Op Plant Biol 9\, 172\, 2006). Screening the 26 founder lines of 
 the maize Nested Associated Mapping (NAM) population identified candidate 
 lines with significant variation in arbuscular mycorrhizal (AM) responsive
 ness and additionally lines with contrasting tolerance to low Pi-fertiliza
 tion. \nVariation in either Pi uptake efficiency (PAE) or the internal Pi 
 use efficiency (PUE) may correlate with either phenotypic variation. The u
 ptake of Pi across the plasma membrane is typically mediated by Pi transpo
 rter proteins belonging to the PHT1 class. Variation in functionality or e
 xpression levels of PHT1 genes therefore might underpin variation in PAE a
 nd/or PUE. Here\, we determined the sequence variation of PHT1 genes acros
 s the maize diversity panel. Focusing on the subset of candidate lines the
  transcriptional response of selected PHT1 genes to different phosphate re
 gimes and/or AM colonization was examined. The molecular data were correla
 ted with shoot biomass production and symbiotic phosphate uptake.  
LOCATION:Department of Plant Sciences\, Large Lecture Theatre
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