Species: Solanum pennellii Common Name: Taxonomy: Solaneae; Solanum; Lycopersicon
Description of Trichomes:
Glandular secreting trichomes (GST).

Of the tomato and its relatives, Solanum pennellii possesses high densities of type IV glandular trichomes on the leaf surfaces (Lemke and Mutschler, 1984). Type IV trichomes consist of a short, multicellular stalk and secrete droplets of sticky exudate at the tip.

The exudate of the type IV trichomes chiefly contains 2,3,4-triacylglucoses (Goffreda et al., 1989), which inhibit aphid settling and are correlated with field resistance to aphids (Goffreda et al., 1990).

1) Lemke CA and Mutschler MA (1984). lnheritance of glandular trichomes in crosses between Lycopersicon esculentum and L. pennellii. J. Am. SOC. Hort. Sci. 109, 592-596.
2) Goffreda JC, Ave DA, Mutschler MA, Steffens JC, and Tingey WM (1989). Aphid deterrence by glucose esters in glandular trichomes of the wild tomato, Lycopersicon pennellii. J. Chem. Ecol. 15,2135-2147.
3) Goffreda JC, Mutschler MA and Steffens JC (1990). Association of epicuticular sugars with aphid resistance in hybrids with wild tomato. J. Am. SOC. Hort. Sci. 115, 161-165.
4) Joseph C. Goffreda, Eugene J. Szymkowiak, lan M. Sussex, and Martha A. Mutschler. (1990) Chimeric Tomato Plants Show that Aphid Resistance and Triacylglucose Production Are Epidermal Autonomous Characters. The Plant Cell, 2:643-649
Publications: 18931142