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Shown are tomato plant varieties that are sensitive (Moneymaker; left panel) or resistant (Motelle; right panel) to the fungal pathogen Fusarium oxysporum. Each panel shows a water-treated control plant on the left and two F. oxysporum-treated plants on the right. Exposure of Moneymaker to F. oxysporum results in severe wilting, while Motelle is resistant. Image credit: Shouqiang Ouyang, UC Riverside.