This research investigates the mechanism of increased salinity tolerance of ectomycorrhizal fungi-inoculated P. sylvestris var. mongolica to provide a theoretical basis for the application of the fungus in saline soils. Growth effects due to inoculation of seedlings with Suillus luteus (a symbiotic ectomycorrhizal fungus), were determined in four kinds of saline–alkali soils. Growth and physiological indicators, including photosynthetic characteristics, plant height, biomass, photosynthetic pigments, catalase (CAT) and superoxide dismutase (SOD) enzyme levels, and malondialdehyde (MDA), an organic marker for oxidative stress, and soluble protein levels were determined. Mycorrhizal colonization rate decreased with increasing saline–alkalinity and growth of inoculated seedlings was significantly enhanced. Biomass and chlorophyll contents also increased significantly. SOD and CAT activities were higher than in non-inoculated seedlings. However, MDA content decreased in inoculated seedlings. Soluble protein content did not increase significantly. Inoculation with a symbiotic ectomycorrhizal fungus could enhance the saline–alkali tolerance of P. sylvestris var. mongolica. Growth and physiological performance of inoculated seedlings were significantly better than that of uninoculated seedlings. The results indicate that inoculated P. sylvestris var. mongolica seedlings may be useful in the improvement of saline–alkali lands.

本研究探讨了外生菌根真菌接种的樟子松变种提高耐盐性的机理。为蒙古真菌在盐渍土上的应用提供理论依据。黄曲霉接种苗对生长的影响（一种共生的外生菌根真菌）是在四种盐碱土壤中测定的。确定了生长和生理指标，包括光合特性，株高，生物量，光合色素，过氧化氢酶（CAT）和超氧化物歧化酶（SOD）酶水平以及丙二醛（MDA），氧化应激的有机标志物和可溶性蛋白质水平。菌根定殖率随盐碱度的增加而降低，接种苗的生长显着增强。生物量和叶绿素含量也显着增加。SOD和CAT活性高于未接种的幼苗。然而，接种的幼苗中MDA含量降低。可溶性蛋白质含量没有明显增加。P.樟子松变种。樟子松。接种苗的生长和生理性能明显优于未接种苗。结果表明，接种了樟子松。蒙古扁豆幼苗可能有助于改善盐碱地。