A comparative study on the seed germination of selected species at the Gatersleben genebank to test the effect of freezing and rewarming on germinability

allium cepa almacenamiento en frío banco de genes banque de gènes cold storage congelación congélation faculté germinative freezing gene banks germinability germinación germination graine pisum sativum poder germinativo secale cereale secale céréale seed treatment seeds semilla stockage au froid temperatura temperature température traitement des semences tratamiento de semillas triticum aestivum