Effect of Simulated Acid Rain on Bursaphelenchus xylophilus Infection of Pine Seedlings
Abstract
White, Scots, and Austrian 3-year-old pine seedlings were treated with conditions simulating acid rain and inoculated with the white pine specific pathotype of Bursaphelenchus xylophilus, VPSt-1. Oleoresin concentration increased slightly and carbohydrate concentration decreased in all seedlings treated with simulated acid rain (SAR). The changes were significantly increased after inoculation of SAR-treated white and Scots pine seedlings with VPSt-1. Wilting was delayed and nematode reproduction decreased in SAR-treated white pine seedlings inoculated with VPSt-1. SAR-treated Austrian pine seedlings were resistant to VPSt-1, but SAR-treated Scots pine seedlings lost tolerance to VPSt-1 and wilted 50-60 days after inoculation. Key words: abiotic stress, acid precipitation, acid rain, Austrian pine, Bursaphelenchus xylophilus, carbohydrate, host response, nematode, oleoresin, pathology, pathotype, pinewood nematode, pine wilt disease, Pinus nigra, P. strobus, P. sylvestris, resistance, Scots pine, susceptibility, white pine.Downloads
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