Fig. 2

Representative Plasmopara viticola development in leaves of susceptible and resistant cultivars. Mycelial growth of the P. viticola isolate (avrRpv⁺) was evaluated using UV epifluorescence after aniline blue staining at 24 hours post inoculation (hpi), 48 hpi, 72 hpi, 96 hpi (left to right). Representative P. viticola development from cultivars within each category are shown: A category I – no development of P. viticola mycelium in Rpv12- and Rpv12/Rpv3-genotypes (pictures from ´Fleurtai´), B category II – minor development of P. viticola mycelium in Rpv10-genotypes (pictures from ´Muscaris´), C category III – moderate development of P. viticola mycelium in Rpv3-genotypes (pictures from ´Cabernet Blanc´) and D category IV – extensive development of P. viticola mycelium in susceptible genotypes (pictures from ´Riesling´). Arrows highlight small P.viticola infection structures. Images are representative of three biological replicates and three independent experiments. Scale bars correspond to 100 μm