Trichomes on leaves of Lycopersicon hirsutum,L. esculentum and their hybrids |
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Authors: | John C Snyder Catherine D Carter |
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Institution: | (1) Department of Horticulture and Landscape Architecture, University of Kentucky, 40546 Lexington, KY, USA |
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Abstract: | Summary Density of certain types of trichomes were characterized on leaflets of Lycopersicon hirsutum, L. esculentum and their hybrids. Trichome density covaried with leaflet development, and depending on the species and type of trichome, density also covaried with leaflet surface. Type IV trichomes were not observed on leaflets of L. esculentum and Type V trichomes were not observed on leaflets of L. hirsutum. Type IV and V trichomes were present on F1 hybrids and densities of these two types of trichomes segregated in the F2 population. When corrected for differences of leaflet size between L. hirsutum and L. esculentum, densities of Type VI trichomes were more similar between species than uncorrected densities. There was little difference in Type VI density among F2 individuals. The appearance, lipid and phenol staining properties, and native fluorescence of the multicellular tip of the Type VI trichome differed between L. hirsutum and L. esculentum. F1 hybrids were intermediate for these characters and these characters segregated in the F2 generation.The investigation reported in the paper (84-10-94) is in connection with a project of the Kentucky Agricultural Experiment Station and is published with the approval of the Director. This material is based upon work supported, in part, by the U.S. Department of Agriculture, Agreement No. 59-2213-1-1-717-0 (Competitive Research Grants Program). |
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Keywords: | Lycopersicon esculentum tomato Lycopersicon hirsutum trichome leaf hairs pubescence |
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