. The chemistry and mode of action of plant growth substances; proceedings of a symposium held at Wye College, University of London, July 1955. Plant regulators; Auxin; Growth (Plants). Metabolism and mode of action Water lAA I A Am IAN lAMe. -f- W Figure 4. Histograms showing the activities in the wheat cylinder test of chromatograms of extracts from solutions treated with wheat tissue. The chromatograms. developed in n-butarwljammoniajwater (100 : 3 : 18), were divided into strips corresponding to one-tenth of the solvent flow. chromatogram previously noted. The results of the pea tests {Fig
. The chemistry and mode of action of plant growth substances; proceedings of a symposium held at Wye College, University of London, July 1955. Plant regulators; Auxin; Growth (Plants). Metabolism and mode of action Water lAA I A Am IAN lAMe. -f- W Figure 4. Histograms showing the activities in the wheat cylinder test of chromatograms of extracts from solutions treated with wheat tissue. The chromatograms. developed in n-butarwljammoniajwater (100 : 3 : 18), were divided into strips corresponding to one-tenth of the solvent flow. chromatogram previously noted. The results of the pea tests {Figure 5) show activity only in those regions where lAA, lAAm, or lAMe formed spots visible on the colour chromatograms. Solutions treated with pea stem tissue Examination of the colour chromatograms obtained from this treatment {Figure 6) showed that, as with wheat tissue, lAA gave rise to a pink area below the acid at R^ 0-2-0-35. The amide, however, behaved quite differently in this instance, giving rise to a well-marked lAA spot, whereas the nitrile gave no lAA and only a small amount of ICA. lAMe gave a distinct blue spot of lAA and a pink-staining degradation product running at Rf 0-2-0-3. The histograms showing the results obtained in the coleoptile elongation test {Figure 7) indicate the presence of a small amount of lAA in the water extract. This loss of lAA from pea stem tissue is substantiated by the fact 238. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Wye College; Wain, R. L; Wightman, F. (Frank). London, Butterworths Scientific Publications
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Keywords: ., bookcentury1900, bookcollectionbiodiver, booksubjectgrowthplants
