Naturally occurring growth substances. II. An improved straight growth test & its applications

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Abstract
After examination and comparison of the characteristics of 1st inter-node sections from a number of oat varieties, those from the red oat "Forkedeer" (Avena byzantina) were developed into a convenient bio-assay for chemical growth substances. This variety was shown to provide sections of outstanding uniformity, sensitivity, range of effective concentration and pH, and availability. Determination of hormone profiles of aqueous and ethereal extracts of the Alaska pea (Pisum sativum), based on the "Forkedeer" assay, failed to provide conclusive evidence of the presence of indole-3-acetic acid. Several unidentified growth promoters, insoluble in ether, were detected.