Genetic variability in the susceptibility of immature peach fruit to Monilinia laxa is associated with surface conductance but not stomatal density

Monilinia laxa is a fungus that causes brown rot in stone fruit. Immature green fruits the first stage of fruit development (stage I) are generally susceptible. To investigate relationship between physical characteristics immature and susceptibility to M. laxa, we characterized progeny, derived from clone wild peach (Prunus davidiana) crossed with two commercial nectarines persica) varieties, through laboratory infection, transpiration monitoring stomata counting. Two types infections were observed - ‘classic’ ‘clear spot’ symptoms which have not previously been described literature. The number density did explain variability infection progeny. However, surface conductance was positively correlated level. This study provides experimental evidence partially linking at stage. role delayed cuticle deposition discussed.