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The physiological, transcriptional and genetic responses of an ozone- sensitive and an ozone tolerant poplar and selected extremes of their F₂ progeny
2011
Street, Nathaniel Robert | James, Tallis Matthew | James, Tucker | Mikael, Brosché | Jaakko, Kangasjärvi | Mark, Broadmeadow | Taylor, Gail
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.
Show more [+] Less [-]Effects of Melampsora leaf rust disease and chronic ozone exposure on poplar
1999
Beare, J.A. | Archer, S.A. | Bell, J.N.B. (Department of Biology, Imperial College at Silwood Park, Ascot SL5-7PY (United Kingdom))
Marssonina leafspot disease of poplar under elevated ozone: pre-fumigated host and in vitro studies
1999
Beare, J.A. | Archer, S.A. | Bell, J.N.B. (Department of Biology, Imperial College at Silwood Park, Ascot SL5-7PY (United Kingdom))
Variation in Copper Accumulation at the Tissue Level of Five Hybrid Poplars Subjected to Copper Stress
2017
Cornejo Calle, Jorge | Tapia, Jaime | Guerra, Fernando | Yáñez, Marco | Baettig, Ricardo | Guajardo, Jorge | Alarcón, Eduardo | Vidal, Gladys
Heavy metal contamination causes significant environmental problems around the world and poses a threat to human health. Poplar hybrids present features for potential uses in phytoremediation systems in areas with heavy metal contamination. The purpose of this study was to assess the copper (Cu) accumulation level in five poplar inter-species hybrids [(Populus trichocarpa × Populus deltoides) × P. deltoides; P. deltoides × Populus nigra; P. trichocarpa × Populus maximowiczii; P. trichocarpa × P. nigra; and (P. trichocarpa × P. deltoides) × (P. trichocarpa × P. deltoides)] grown in a hydroponic system. The treatments entailed the application of low and high doses of Cu of 8.0 and 16.0 μM, respectively. Cu accumulation was observed in roots, stems, and leaves, which was determined using flame atomic absorption spectroscopy, prior acid digestion of each sample. The methodology was validated according to certified reference material (Cypress BIMEP 432). Significant differences in Cu accumulation were found among genotypes for both roots and leaves, but not for stems. In roots, the genotype P. deltoides × P. nigra had a Cu accumulation level of 169.8% higher than the average accumulation found in the other genotypes. The (P. trichocarpa × P. deltoides) × P. deltoides hybrid showed the least Cu accumulation in leaves. The results of this study can potentially be used for proper crossovers and hybrids selection within the genus Populus for phytoremediation of Cu contaminated land.
Show more [+] Less [-][Technology project: Phytoremediation of oil products at a disused filling station]
2000
Larsen, L.C. (Hedeselskabet, Viborg (Denmark)) | Trapp, S.