摘要 : This study investigated several aspects related to salt tolerance in arbuscular mycorrhizal (AM) tomato. Non-AM and AM tomato plants were grown in pots with organic soil and watered with different level of NaCl solution (0, 0.5 an... 展开 This study investigated several aspects related to salt tolerance in arbuscular mycorrhizal (AM) tomato. Non-AM and AM tomato plants were grown in pots with organic soil and watered with different level of NaCl solution (0, 0.5 and 1%). Concentration of Na⁺ and Cl^- in shoots or roots, solute accumulation, MDA content, O₂^.- generation rate and other parameters were determined for both treatments under continuous salt stress. A significantly positive impact of AM fungi on plant growth was observed. Leaves and roots accumulated more soluble sugar and showed higher leaf water potential( Psi ), soluble protein in AM symbiosis. Proline was also higher in AM roots, while the opposite was observed in leaves. MDA content, O₂^.- generation rate increased in both AM and non-AM seedlings under salt stress, especially in non-AM seeding. In addition, AM colonization significantly decreased Na⁺ concentration in roots and shoots, but reduction of Cl^- concentration was indistinctive. As a consequence, we suggest that the improve salt tolerance of AM tomato is related to lower Na⁺ toxicity in shoots and roots, higher accumulation of soluble sugar, protein and proline under salinity. These could result in a greater osmotic adjustment in salinity. 收起