Betaine : A Plant-growth Substance from Sugar-beet (Beta vulgaris)

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Abstract
Segments cut from chromatograms of the aqueous fraction of extracts of sugar-beet seed balls, leaves, and roots, in the region producing a red-brown spot with iodine vapour similar in colour and Rf to that produced by betaine, inhibited growth of dwarf French bean leaf disks in a similar manner to betaine solutions. Similar regions from chromatograms made with small amounts of aqueous fractions promoted growth of wheat coleoptile sections and cress hypocotyls, where-as those from chromatograms of large amounts of extracts inhibited the growth of the same tissues, and cress roots, as did betaine. Ethyl acetate fractions of the extracts had no effect on growth of bean leaf disks or cress seedlings but they inhibited germination of cress seeds and their subsequent growth, whereas the water-soluble betaine did not affect cress germination.

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