title: Evaluating the tolerance of young hybrid poplar trees to recycled waters high in salinity and boron.
abstract: The successful adoption of water recycling strategies in many arid regions will require crops able to tolerate poor-quality waters. We evaluated different clones for salt and boron (B) tolerance within each of seven genetically distinct genomic groups (e.g., deltoides, deltoides x nigra, trichocarpa x deltoides, trichocarpa x deltoides x maximowizcii, trichocarpa x deltoides x nigra, trichocarpa x nigra, trichocarpa x maximowizcii). During each evaluation period, different clones within each of the groups were irrigated with high sodium chloride (NaCl) salinity (i.e., 10-30 dS m(-1)) and B (i.e., 10 mg L(-1)) water up to a maximum of 150 days, for a 4-year testing period under micro-field plot conditions. Excessive accumulation (up to 6%) of chloride (Cl) likely caused toxicity symptoms (necrosis of the leaves) observed in the less tolerant clones, while leaf B concentrations rarely exceeded 300 mg kg(-1) DM in any clone. Increased soil salinity likely hindered the uptake of B by the clones. Our results show that a wide range of selected Populus clones, of parentage trichocarpa x nigra, followed by deltoides x nigra show potential salt and B tolerance as young trees to recycled waters high in salinity and B.
authors.affiliation: USDA-ARS, Parlier, CA 93648, USA. gary.banuelos@ars.usda.gov
authors.forename: G S
authors.initials: GS
authors.lastname: Bañuelos
authors.forename: D
authors.initials: D
authors.lastname: LeDuc
authors.forename: J
authors.initials: J
authors.lastname: Johnson
mesh_terms: D057914:Agricultural Irrigation / Q000379:methods; D003247:Conservation of Natural Resources; D032107:Populus / Q000187:drug effects / Q000254:growth & development*; D059027:Recycling / Q000379:methods; D054712:Salinity; D012621:Seasons; D012965:Sodium Chloride / Q000494:pharmacology; D013472:Sunlight; D013696:Temperature; D014861:Washington; D014865:Waste Disposal, Fluid; D014881:Water Supply
chemical_list: D012965:Sodium Chloride