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Sex-related responses of European aspen (Populus tremula L.) to combined stress: TiO2 nanoparticles, elevated temperature and CO2 concentration.
Zhang, Yaodan; Virjamo, Virpi; Sobuj, Norul; Du, Wenchao; Yin, Ying; Nybakken, Line; Guo, Hongyan; Julkunen-Tiitto, Riitta.
Afiliación
  • Zhang Y; State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 210023 Nanjing, China; Department of Environmental and Biological Sciences, University of Eastern Finland, 80101 Joensuu, Finland.
  • Virjamo V; Department of Environmental and Biological Sciences, University of Eastern Finland, 80101 Joensuu, Finland.
  • Sobuj N; Department of Environmental and Biological Sciences, University of Eastern Finland, 80101 Joensuu, Finland.
  • Du W; State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 210023 Nanjing, China.
  • Yin Y; State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 210023 Nanjing, China.
  • Nybakken L; Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, 1432 Ås, Norway.
  • Guo H; State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 210023 Nanjing, China. Electronic address: hyguo@nju.edu.cn.
  • Julkunen-Tiitto R; Department of Environmental and Biological Sciences, University of Eastern Finland, 80101 Joensuu, Finland.
J Hazard Mater ; 352: 130-138, 2018 06 15.
Article en En | MEDLINE | ID: mdl-29602072
The combined effects of climate change and chemical contaminants on plant performance are still not well understood. Especially, whether different sexes of dioecious plants respond differently to combined stresses is unknown. In order to study the sex-related responses of European aspen to soil nTiO2 contamination (0, 50, 300 mg kg-1) under elevated temperature (+1.6 °C) and CO2 (730 ppm), we conducted a study in greenhouses. Ti accumulated in roots exposed to nTiO2 (1.1-3.3 and 2.7-21.1 mg kg-1 in 50 and 300 mg kg-1 treatments, respectively). Elevated CO2 had no effects on Ti uptake, while elevated temperature increased it in the 300 mg kg-1 treatment. Males grew taller than females under ambient conditions, but females had greater height and biomass increment under elevated temperature. In all climate treatments, nTiO2 increased leaf phenolics in females by 12-19% and 15-26% at 50 and 300 mg kg-1, respectively. Leaf phenolics decreased under elevated temperature, but increased under elevated CO2 in both sexes. Results suggest that females have better chemical defense against nTiO2 than males under future climate conditions. In the longer run, this may cause changes in the competitive abilities of both sexes, which again may affect sex ratios and genetic variation in nature.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Temperatura / Titanio / Dióxido de Carbono / Populus / Nanopartículas Idioma: En Revista: J Hazard Mater Asunto de la revista: SAUDE AMBIENTAL Año: 2018 Tipo del documento: Article País de afiliación: Finlandia Pais de publicación: Países Bajos
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Temperatura / Titanio / Dióxido de Carbono / Populus / Nanopartículas Idioma: En Revista: J Hazard Mater Asunto de la revista: SAUDE AMBIENTAL Año: 2018 Tipo del documento: Article País de afiliación: Finlandia Pais de publicación: Países Bajos