Trehalase activity in mycorrhizal and nonmycorrhizal roots of leek and soybean |
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Authors: | A Schubert P Wyss |
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Institution: | (1) Dipartimento Colture Arboree, Università di Torino, Via P. Giuria, I-10126 Turin, Italy;(2) Centro di Studio sulla Micologia del Terreno CNR, Viale Mattioli, I-10125 Turin, Italy;(3) Present address: Ciba-Geigy AG, CH-4002 Basel, Switzerland |
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Abstract: | Root extracts of leek (Allium porrum L.) and soybean (Glycine max L. Merr.) showed trehalase activity which was inhibited by phloridzin and was several times higher than the activity of general -glucosidase. The activity had an acidic optimum. Trehalase activity in extracts of sporocarps and extraradical mycelium of the arbuscular mycorrhizal fungus Glomus mosseae Nicol. & Gerd. (Trappe & Gerd.) was higher than in root extracts and had an optimum at pH 7. Following inoculation with G. mosseae, trehalase activity increased in mycorrhizal roots above the levels observed in nonmycorrhizal roots. Irrespective of fungal colonization, root trehalase activity increased in the presence of Mg2+, decreased in the presence of Mn2+ and Zn2+, and was unaffected by Na2EDTA. |
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Keywords: | Allium porrum Glycine max Trehalose |
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