Characterization of acifluorfen selectivity mechanisms in tomato and related Lycopersicon species
Fourteen tomato (Lycopersicon esculentum) genotypes, Eastern Black nightshade, and 35 wild Lycopersicon accessions were screened for tolerance to acifluorfen. Response to acifluorfen was not species specific, but in general, the cultivated tomato varieties were slightly more tolerant than the wild accessions. From the genotypes initially screened, 15 with differential tolerance were chosen for further study depending on their fresh weight response to aciflourfen as well as their vigor rating after treatment. The relationship of trichome and stomate density, quantity of epicuticular wax and cuticle, and wax composition to acifluorfen tolerance was determined. There was no correlation between trichome density and acifluorfen tolerance or susceptibility, however, an inverse relationship between stomate density and tolerance was observed. Amount and composition of the epicuticular wax and the cuticle differed among genotypes, but did not correlate to acifluorfen tolerance.
University of Illinois - Urbana-Champaign
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University of Illinois at Urbana-Champaign