Resumo

FLORES-CORDOVA, María Antonia et al. Broccoli juice in the inhibition of Alternaria alternata in minimally processed arugula: Postharvest quality. Rev. Chapingo Ser.Hortic [online]. 2014, vol.20, n.3, pp.307-322. ISSN 2007-4034.  https://doi.org/10.5154/r.rchsh.2013.09.028.

Some plants of the Brassica family have antifungal properties against various microorganisms of economic importance. These properties are attributed to Glucosinolates (GLs) by hydrolysis of the myrosinase enzyme. This study, initially under in vitro conditions, we evaluated the germination of Alternaria alternata spores on potato dextrose agar culture medium at concentrations 0.15, 0.11, 0.07, 0.04, 0.01 and 0 μg·μl^-1. Subsequently we evaluated the antifungal effect of broccoli juice by severity and incidence of damage on post-harvest quality of arugula leaves stored at 0 and 4 °C and temperature (22 ± 3 °C) for 15 days; for this, leaves were inoculated with Alternaria spores solution (1 x 10⁶) plus broccoli juice concentration of 2.98 and 1.49 μg·ml^-1; control treatment was tested additionally. Hue angle, chroma, brightness, chlorophyll, CO₂ and ethylene were the variables measured. The results showed that the minimum concentration of broccoli juice was 0.07 μg·μl^-1 with 100 % inhibition. In vivo the concentration of 2.98 μg·mg^-1 with 0 % damage and temperature of 0 °C maintained the quality parameters in excellent condition at the end of storage. So broccoli juice (GLs) can be used in postharvest to control Alternaria alternata.

Palavras-chave : Eruca vesicaria (L.) Cav. subsp. sativa (Mill.) Thell.; glucosinolates; low temperatures; color; respiration.

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