The physiological, transcriptional and genetic responses of an ozone-sensitive and an ozone tolerant poplar and selected extremes of their F2 progeny.
Relatively little is known about the transcriptional response or genetic control of response and adaptation of trees to tropospheric ozone exposure. Such understanding is needed as up to 50% of forests, globally, may be subjected to phytotoxic concentrations of ozone. The physiological, transcriptional and genetic response to ozone was examined in Populus trichocarpa and P. deltoides, which show extreme sensitivity and tolerance to ozone, respectively. Using an inbred F2 mapping population derived from these two species, we mapped quantitative trait loci (QTL) for traits associated with ozone response, examined segregation of the transcriptional response to ozone and co-located genes showing divergent responses between tolerant and sensitive genotypes with QTL. QTL were identified linking detrimental effects of ozone with leaf and biomass traits and differential responses were found for key genes involved in ethylene production and response.
Street
Nathaniel Robert
NR
School of Biological Sciences, University of Southampton, Bassett Crescent East, SO16 7PX, UK.
James
Tallis Matthew
TM
School of Biological Sciences, University of Southampton, Bassett Crescent East, SO16 7PX, UK.
James
Tucker
T
School of Biological Sciences, University of Southampton, Bassett Crescent East, SO16 7PX, UK.
Mikael
Brosché
B
Plant Biology, Department of Biological and Environmental Sciences, University of Helsinki, FIN-00014 Helsinki, Finland.
Jaakko
Kangasjärvi
K
Plant Biology, Department of Biological and Environmental Sciences, University of Helsinki, FIN-00014 Helsinki, Finland.
Mark
Broadmeadow
B
Environmental Research Branch, Forest Research, Alice Holt Lodge, Farnham, Surrey GU10 4LH, UK.
Taylor
Gail
G
School of Biological Sciences, University of Southampton, Bassett Crescent East, SO16 7PX, UK. Electronic address: g.taylor@soton.ac.uk.
D018506:Gene Expression Regulation, Plant / Q000187:drug effects / Q000235:genetics; D020411:Oligonucleotide Array Sequence Analysis; D010126:Ozone / Q000633:toxicity*; D032107:Populus / Q000187:drug effects* / Q000235:genetics*; D040641:Quantitative Trait Loci / Q000235:genetics
D010126:Ozone