| Abstract: | Efflux of K+ from tomato fruit pericarp disks was not affectedby 100 µM tomatine, and only slightly by 1 mM. No differentialresponses to the alkaloid were observed in disks obtained fromfruits at different stages of development, and there was noevidence of any correlation between the level of endogenoustomatine and the effect of exogenous tomatine. Growth of tomatoseedlings in liquid nutrient medium was unaffected by 1 mM tomatinewhereas the growth oflettuce seedlings was stunted in the presenceof 100 µM alkaloid. The polyene antibiotic nystatin gavesimilar resultsto tomatine, having little effect on tomato tissuesbut causing marked inhibition of lettuce seedling development. |
