Galaktomannanabbau in keimenden Johannisbrotsamen (Ceratonia siliquaL.)

摘要

In the first days of germination of carob seeds (Ceratonia siliquaL., Leguminosae) (until penetration of the seed coat by the radicle) oligosaccharides of the raffinose series present in the endosperm and embryo are hydrolysed. The mobilisation of the reserve galactomannan of the endosperm begins after the emergence of the radicle. Its degradation is effected by hydrolytic enzymes (α-galactosidase EC 3.2.1.22, β-mannanase, EC 3.2.1.25and β-mannosidase EC 3.2.1.25) and the breakdown products-galactose and mannose-are continuously metabolised by the embryo. At the same time starch synthesis is observed in the embr