[Free amino acids in endosperm ofRaphanus sativus L. after 4x×4x and 4x·2x crosses].
The amino acid pool in the endosperm of ovules ofRaphanus sativus var.sativus from 4x · 4x and 4x · 2x crosses was studied. There are striking differences between the two types of endosperm. In a normally functioning 6x endosperm (4x · 4x) the amino acid concentrations decrease sharply, though temporarily, especially between the 12th and 15th day after pollination. In 5x endosperm (4x · 2x) the amino acid concentrations are high and remain relatively unchanged. We assume this to be a metabolic anomaly and a possible cause for the degeneration of the embryo.
Institut für Pflanzenzüchtung Quedlinburg der Deutschen Akademie der Landwirtschaftswissenschaften zu Berlin, Berlin, Deutschland.
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Clauss