Mineral Composition of Bean Stems Treated with 3-Indoleacetic Acid

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Abstract
Lanolin paste containing 2% 3-indoleacetic acid was applied to the surface of middle portions of the first internode of young bean plants (Phaseolus vulgaris). Spectrographic analyses were used to determine the mineral content of treated and untreated sections. During 6 days immediately following treatment, water increased linearly with time in both treated and untreated sections. Dry wt. increased exponentially with time in treated sections; slightly and irregularly in the untreated ones. 30 hours after treatment, highly significant increases occurred in K, Mg, Mn and B as the result of treatment. K and Mg in treated sections increased linearly with time, while increases in Mn and B were irregular. P in treated sections increased exponentially with time, significant increase being detected 48 hrs. after treatment. Cu also showed the first significant increase after 48 hrs. and Fe after 72 hrs. Al showed a significant increase 72-100 hrs. after treatment. Ca in both treated and untreated sections increases exponentially with time. No significant differences in Ca content in treated and untreated sections occurred.

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