Sugar transport into storage tubers of Stachys sieboldii Mig.: Evidence for symplastic unloading and stachyose uptake into storage vacuoles by an H(+)-antiport mechanism

azucares blatt feuille hojas leaves nutrient transport pflanzenphysiologie photosynthese photosynthesis protoplast protoplaste protoplastos protoplasts stachys stachys sieboldii storage organs sucres sugars technique des traceurs tracer techniques transport des substances nutritives transporte de nutrientes vacuole vacuoles zucker