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The Influence of Soil Zinc on Nodulation, Mycorrhizae, and Ozone-Sensitivity of Pinto Bean. W. D. McIlveen, Graduate Assistant, Department of Plant Pathology, Center for Air Environment Studies, The Pennsylvania State University, University Park 16802; R. A. Spotts(2), and D. D. Davis(3). (2)Graduate Assistant, Department of Plant Pathology, The Pennsylvania State University, University Park 16802; (3)Assistant Professor, Department of Plant Pathology and Center for Air Environment Studies, The Pennsylvania State University, University Park 16802. Phytopathology 65:645-647. DOI: 10.1094/Phyto-65-645.

The effect of soil zinc amendments on nodulation, vesicular-arbuscular mycorrhizae, and ozone sensitivity of pinto bean was studied. Zinc amendments of 45 and 135 µg/g decreased both nodulation and mycorrhizae when compared to levels in nonamended soil. Ozone sensitivity of plants increased as available soil zinc increased.