Storage of Quinolizidine Alkaloids in Epidermal Tissues

Michael Wink
1986 Zeitschrift für Naturforschung C - A Journal of Biosciences  
Epidermal cells of lupine leaves, petioles and stems are the main storage site for quinolizidine alkaloids with an alkaloid content of 5-6 mg/g fw (= 15 - 25 mmol/kg). Epidermal tissue also store malate and hydrogen ions and show a vacuolar pH of < 5. It is argued that the specific storage of alkaloids in the vacuoles of epidermal cells might be due to active transport via carrier proteins and cannot be explained by a simple diffusion and ion trap mechanism.
doi:10.1515/znc-1986-0401 fatcat:ff6tycx2f5ea5ltzpvemreonye