Über den Abbau des Sinapins während der frühen Ontogenese der Keimlinge von Sinapis alba L. / Degradation of Sinapine during the Early Development of Sinapis alba L.

Abstract

The amount of sinapine in immature seeds of Sinapis alba is very low; it increases during ripening. Most of the sinapine is located in the cotyledons. Hypocotyls and roots contain only traces of it. During the early development of seedlings the amount of sinapine in the cotyledons decreases in 26 °C very rapidly. Simultaneously the amount of a substance X increases. Darkness retarded both these processes. The same effect has a temperature of 10 °C. In both cases the increase of X is completly proportional to the decrease of sinapine. Therefore X is probably a derivative of sinapine. After pretreatment with 26 °C the decrease of sinapine in the cold is stronger. The amount of sinapic acid increases only in the at a very low level for a long period.