Role of osmotic stress in ion accumulation and physiological responses of mycorrhizal white spruce (Picea glauca) and jack pine (Pinus banksiana) to soil fluoride and NaCl

• Autorzy: Calvo-Polanco M. , Zwiazek J. J.
• Języki publikacji: EN

Abstrakty

EN

To examine the mechanisms of earlier reported alleviation of fluoride injury in ectomycorrhizal plants by NaCl, jack pine (Pinus banksiana) and white spruce (Picea glauca) seedlings were subjected to 1 mM and 5 mM KF in the presence of either 60 mM NaCl or 10% polyethylene glycol 3350 (PEG) for 2 weeks. Before the treatments, seedlings had either been inoculated with the ectomycorrhizal fungus Suillus tomentosus or remained non-inoculated. The inoculation with S. tomentosus reduced Na uptake by shoots and roots of jack pine seedling and by roots of white spruce that were treated with 60 mM NaCl. Mycorrhizal associations also drastically decreased fluoride uptake by jack pine seedlings, but did not affect shoot fluoride concentrations in white spruce. When NaCl was replaced by PEG in the 5 mM KF treatment solution, shoot fluoride concentrations were reduced by more than twofold without corresponding reductions in transpiration rates in mycorrhizal and non-mycorrhizal white spruce seedlings. When fluoride was present in the treatment solution, Na concentrations were lower in shoots and roots of both jack pine and white spruce mycorrhizal and non-mycorrhizal seedlings. The results suggest that Suillus tomentosus may help alleviate the effects of soil fluoride and salinity in jack pine and that fluoride uptake in white spruce is sensitive to osmotic stress.

• Wydawca: -
• Czasopismo: Acta Physiologiae Plantarum
• Rocznik: 2011
• Tom: 33
• Numer: 4
• Opis fizyczny: p.1365-1373,fig.,ref.

Twórcy

autor

Calvo-Polanco M.

• Department of Renewable Resources, University of Alberta, 442 Earth Sciences Bldg, Edmonton, AB, T6G 2E3, Canada

autor

Zwiazek J. J.

• Department of Renewable Resources, University of Alberta, 442 Earth Sciences Bldg, Edmonton, AB, T6G 2E3, Canada

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