LEAF MORPHOLOGY AND ANATOMY IN THE GENUS FRAGARIA: IMPLICATIONS FOR RESISTANCES
For the first time, the genus of Fragaria was investigated by electron microscopy with regard to epicuticular wax structures and trichome formation on adaxial and abaxial leaf surfaces. In addition, cross-sections and volatile patterns of leaves of several genotypes were analyzed. Distinct differences of epicuticular wax structures among the species were observed on the adaxial but not on the abaxial leaf side. Obviously, epicuticular wax structures are not essential for susceptibility reactions to fungal diseases. Epidermal wall thickness as a reason for resistance to leaf diseases can only be supported for individual examples. Resistance to spider mite (Tetranychus urticae Koch) can be traced back to trichome formation on the abaxial side of the leaf. Additionally, the volatile analysis revealed the release of VOCs as a response to the spider mite attack.
Olbricht, K., Ludwig, A., Ulrich, D., Spangenberg, R., Guenther, M. and Neinhuis, C. (2014). LEAF MORPHOLOGY AND ANATOMY IN THE GENUS FRAGARIA: IMPLICATIONS FOR RESISTANCES. Acta Hortic. 1049, 269-273
epicuticular wax, epidermal wall, trichomes, phylogeny, breeding, volatiles