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试验将西南林区的3株土著外生菌根真菌即彩色豆马勃Pt 715(Pisolithus tinctorius 715)和松乳菇[Lactarius deliciosus(L.Fr.)Gray]的两个株系Ld2,Ld3培养在酸性铝溶液中,测定其生长及养分吸收状况,以研究它们在酸铝胁迫下的营养响应及抗铝性,为将其应用于酸铝林区的生态修复提供理论依据.结果表明:13菌株均具抗铝性,其抗铝能力大小依次为Ld2,Ld3,Pt 715;2酸铝胁迫时,3株真菌除对钾的吸收明显下降外,对磷、铁、镁的吸收显著增强,对铝有超富集作用,尤其是高铝时,Pt 715,Ld2和Ld3的含铝量分别是低铝时的4.83倍,13.53倍和8.89倍;3 Ld2在生长,对磷、铁、镁的吸收,以及对铝的富集作用上均强于Pt 715和Ld3,可能是快速缓解铝毒最具潜力菌株.
In this study, three indigenous Ectomycorrhizal fungi, Pisolithus tinctorius 715 and Ld2, Ld3, were cultivated in two strains of Lactarius deliciosus (L.Fr.) Gray] In acidic aluminum solution, the growth and nutrient uptake were measured to study their nutritional response and aluminum resistance under acid-aluminum stress, which provided a theoretical basis for ecological restoration in the area of acid-aluminum forest.The results showed that: 13 The strains were all resistant to aluminum and their resistance to aluminum was Ld2, Ld3 and Pt715, respectively. Except for the significant decrease of potassium absorption, the absorption of phosphorus, The content of aluminum in Pt 715, Ld2 and Ld3 is 4.83 times, 13.53 times and 8.89 times higher than those in low aluminum, especially in the case of high aluminum. The growth of 3 Ld2 is negative for phosphorus, iron, magnesium The absorption and the enrichment of aluminum were stronger than that of Pt 715 and Ld3, which may be the most potential strain to quickly alleviate aluminum toxicity.