title: Effects of long-term ambient ozone exposure on biomass and wood traits in poplar treated with ethylenediurea (EDU).
abstract: This is the longest continuous experiment where ethylenediurea (EDU) was used to protect plants from ozone (O3). Effects of long-term ambient O3 exposure (23 ppm h AOT40) on biomass of an O3 sensitive poplar clone (Oxford) were examined after six years from in-ground planting. Trees were irrigated with either water or 450 ppm EDU. Above (-51%) and below-ground biomass (-47%) was reduced by O3 although the effect was significant only for stem and coarse roots. Ambient O3 decreased diameter of the lower stem, and increased moisture content along the stem of not-protected plants (+16%). No other change in the physical wood structure was observed. A comparison with a previous assessment in the same experiment suggested that O3 effects on biomass partitioning to above-ground organs depend on the tree ontogenetic stage. The root/shoot ratios did not change, suggesting that previous short-term observations of reduced allocation to tree roots may be overestimated.
authors: IPSP-CNR, Via Madonna del Piano 10, 50019, Sesto Fiorentino, Italy.
authors: G
authors: G
authors: Carriero
authors: IVALSA-CNR Laboratory of Xylogenesis, Via Madonna del Piano 10, 50019, Sesto Fiorentino, Italy.
authors: G
authors: G
authors: Emiliani
authors: IVALSA-CNR Laboratory of Xylogenesis, Via Madonna del Piano 10, 50019, Sesto Fiorentino, Italy.
authors: A
authors: A
authors: Giovannelli
authors: IPSP-CNR, Via Madonna del Piano 10, 50019, Sesto Fiorentino, Italy.
authors: Y
authors: Y
authors: Hoshika
authors: Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA, 01003-9320, USA.
authors: W J
authors: WJ
authors: Manning
authors: IVALSA-CNR Laboratory of Xylogenesis, Via Madonna del Piano 10, 50019, Sesto Fiorentino, Italy.
authors: M L
authors: ML
authors: Traversi
authors: IPSP-CNR, Via Madonna del Piano 10, 50019, Sesto Fiorentino, Italy. Electronic address: elena.paoletti@cnr.it.
authors: E
authors: E
authors: Paoletti
mesh_terms: D000393:Air Pollutants / Q000032:analysis / Q000633:toxicity*; D018533:Biomass; D010126:Ozone / Q000032:analysis / Q000633:toxicity*; D010671:Phenylurea Compounds / Q000494:pharmacology*; D018517:Plant Roots / Q000187:drug effects / Q000254:growth & development; D018547:Plant Stems / Q000187:drug effects / Q000254:growth & development; D032107:Populus / Q000187:drug effects* / Q000254:growth & development; D014867:Water / Q000737:chemistry; D014934:Wood / Q000187:drug effects* / Q000254:growth & development
chemical_list: D000393:Air Pollutants; D010671:Phenylurea Compounds; D014867:Water; C032766:ethylene diurea; D010126:Ozone
keywords: Allocation; Biomass; Ethylenediurea; Ground-level ozone; Poplar; Root-to-shoot ratio; Stem shape; Wood traits