Research noteMarmesin (cas 13710-70-8), a new phytoalexin associated with resistance of parsley to pathogens after harvesting

Add time:09/08/2019    Source:sciencedirect.com

The study tested two parsley (Petroslinum crispum) cultivars, ‘Janet’ (resident) and ‘Hazera’ (susceptible), that differ in their response to the fungus Botrytis cinera Pers. During the 4 days after inoculation with B. cinerea, at 24 °C, concentrations of (+)marmesin in leaves sampled from ‘Janet’ and ‘Hazera’ increased from 17 to 145 μg g−1 fresh weight (FW) and from 8 to 25 μg g−1 FW, respectively. After the 4th day, levels decreased. Incidence of decay (necrotic areas) in ‘Janet’ and ‘Hazera’ leaves 4 days post-inoculation with B. cinerea, at 24 °C, were 4 and 68 mm2, respectively. EC50 values of (+) marmesin for the pathogenic fungi B. cinerea, Alternaria alternata (Fr.) Keissler and Sclerotinia sclerotiorum (Lib) De Bray in vitro were found to be 30, 40 and 25 μg ml−1, respectively. (+)Marmesin levels were highly correlated with resistance.

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