For a number of 14C-sugars and other compounds, it has been shown, that their introduction through the xylem system into detached tops of the inflorescence causes a subsequent exudation of 14C-sucrose from the phloem. D-glucose, D-fructose, D-galactose, maltose and lactose were converted exclusively to sucrose. The fed substance itself was absent in the exudate. Feeding D-sorbitol and K-glycerate led to exudation of these substances together with small amounts of sucrose, whereas L-sorbose, glycerol, glycolic acid and glutamine were not at all converted to sucrose and exuded as such. The results are briefly discussed.

Acta botanica neerlandica

CC BY 3.0 NL ("Naamsvermelding")

Koninklijke Nederlandse Botanische Vereniging

P.M.L. Tammes, C.R. Vonk, & J. van Die. (1973). Studies on phloem exudation from Yucca flaccida Haw. XI. Xylem feeding of 14C-sugars and some other compounds, their conversion and recovery from the phloem exudate. Acta botanica neerlandica, 22(3), 233–237.