Mineral Content in Leaves of Tomato Plants Grafted on Solanum Rootstocks

Nutrient uptake of tomato plants cv. Momotaro grafted on Solanum sisymbriifoliulm, S. torvum and S. toxicarium which are resistant to soil-born disease were compared with tomato grafted on its own root, a tomato/tomato, scion/rootstock combination. Mineral content in leaves of tomato/S. sisymbriifoliulm was nearly equal to that of tomato/tomato. In leaves of tomato/S. torvum, nitrogen content was higher, and magnesium content was lower than those of tomato/tomato. Furthermore, phosphorus and magnesium content in leaves of tomato/ S. toxicarium was low as compared with that of tomato/tomato.土壌伝染性病害に複合抵抗性を有する非塊茎性ナス属植物を台木にした接ぎ木トマトの養分吸収特性について, Solanum sisymbriifolium, S. torvumおよびS. toxicariumを台木にして, 共台(トマト‘桃太郎\u27)と比較した. Solanum sisymbriiifolium台トマトでは, 養分吸収特性に共台と近似した傾向が確かめられた. S. torvumでは窒素の過剰吸収と, 極端なマグネシウムの吸収抑制が明らかになった. さらに, S. toxicariumではリンとマグネシウムの吸収不良が認められた