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- Author or Editor: William J. Manning x
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Effect of the Ectomycorrhizal Fungus Pisolithus tinctorius and Auxin Rooting Formulations on Growth of ‘Cortland’ Apple Trees
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Abstract
‘Cortland’/Mailing (M) 7 apple trees (Malus domestica Bork.) which were treated at planting time with commercial root promoters, containing either naphthaleneacetamide (NAAm) + naphthaleneacetic acid (NAA), indolebutyric acid (IBA) + fertilizer, or the ectomycorrhizal fungus Pisolithus tinctorius, increased terminal growth. P. tinctorius was superior to either rooting compound for increasing total growth, and only P. tinctorius increased root weight. Colonization of the root system by P. tinctorius was not observed, although the roots of P. tinctorius-treated trees appeared to have more endomycorrhizae. The growth increase was not due to increased nutrient uptake.
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HortScience