Abstract
Germination of Lactuca sativa L. was inhibited by mixtures of quinolizidine alkaloids. The alkaloid esters resulted in the strongest inhibition: 6 mM 13-tigloyloxylupanine inhibited germination by 100%, whereas the other lupin alkaloids, such as lupanine and sparteine, gave a 45 and 20% inhibition, respectively. Seedlings of Lupinus albus L., which are not affected by quinolizidine alkaloids, excrete lupanine and 13-tigloyloxylupanine into the surrounding medium by their roots. It is assumed that lupin alkaloids are potential compounds of plant-plant interaction (i.e. allelopathy) besides their role in plant-herbivore interrelations.
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Wink, M. Inhibition of seed germination by quinolizidine alkaloids. Planta 158, 365–368 (1983). https://doi.org/10.1007/BF00397339
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DOI: https://doi.org/10.1007/BF00397339