Evidence for symplastic phloem unloading with concomitant high activity of acid cell wall invertase in Agrobacterium tumefaciens-induced plant tumor

agrobacterium tumefaciens cell walls cytoplasmic organelles faisceau vasculaire feuille floema fluoreszenz fructofuranosidasa fructofuranosidase gene expression haces vasculares hojas ion iones ions kalanchoe leaves metabolic disorders nutrient transport optical properties organite cellulaire organulos citoplasmicos pared celular parenchyma parenchyme parenquima paroi cellulaire pflanzentumor phenol phenolic compounds phloem plant tissues plasmodesma potasio potassium ricinus communis stems tallo tejidos vegetales tige transport des substances nutritives transporte de nutrientes vascular bundles