Die Wirkung einer Vorbestrahlung auf den Wuchsstoffgehalt von X-2-Pflanzen bei Brassica oleracea var. acephala Von

The Effect of Pre-irradiation on the Content of Growth Substances in Xi-Plants of Brassica oleracea var. acephala. The auxin content of growth stimulated young plants (Brassica oleraceav ar. acephala) of the X2-generation, originating from X-ray irradiated seeds (75 kR) was determined. Methanolic extracts were separated on thin-layer-chromatograms, which were analyzed by ultra-violet light and various chemical reactions. Quantitative determinations of growth substances were made using the Avena-coleoptile-cylinder-test. The following results were obtained: 1. X2-plants had a higher content of IAN compared with unirradiated control samples; 2. IAAm was detectable in only two out of 40 experiments; 3. Two fluorescent substances were detected: a hydroxycinnarmc acid derivative and a long chained unsatu-rated ketone or aldehyde, which is still unknown.