Assimilate partitioning in Pachyrhizus erosus tubers under short days

amidon carbon carbone carbono feuille fotoperiodismo fructosa fructose glucosa glucose hojas leaves nudosidades radiculares nutrient transport pachyrhizus photoperiodicity racine relaciones fuente sumidero relation source puits root nodules roots saccharose source sink relations starch stems sucrosa sucrose tallo technique des traceurs temps tiempo tige time tracer techniques transport des substances nutritives transporte de nutrientes tubercule tubers