Postharvest BTH treatment induced disease resistance and enhanced reactive oxygen species metabolism in muskmelon (Cucumis melo L.) fruit

Abstract

Benzo (1, 2, 3)-thiadiazole-7-carbothioic acid S-methyl ester (BTH) is a novel synthetic elicitor capable of inducing disease resistance in many plants. Fruits were dipped in BTH at 100 mg/L for 10 min, and then stored at room temperature (22 ± 2°C, relative humidity 55-60 %). The results showed that BTH significantly (P \ 0.05) reduced the lesion area of fruits inoculated with Trichothecium roseum and the natural disease incidence of fruits during storage at room temperature. The treatment effectively maintained cell membrane integrity and decreased the production of lipid peroxidation and malondialdehyde. BTH treatment markedly enhanced the accumulation of hydrogen peroxide, (H 2 O 2 ) while decreased the rate of superoxide anion (O 2 Á-) production. Furthermore, BTH observably increased the activities of NADPH oxidase (NOX, EC1.6.3.

Reactive oxygen species metabolism and phenylpropanoid pathway involved in disease resistance against Penicillium expansum in apple fruit induced by ϵ‐poly‐l‐lysine

“…ROS was important against pathogen invasion in fruit as a result of directly killing the pathogen or slowing down its ingress, and also served as a signal to trigger defense responses . Studies have been shown that an increasing H 2 O 2 content enhances disease resistance in apple, peach, strawberry, pear and muskmelon fruits . The results obtained in the present study show that the production of H 2 O 2 in apple fruits was significantly induced by PL treatment.…”

Methyl jasmonate primes defense responses against Botrytis cinerea and reduces disease development in harvested table grapes

“…Recently, there is increasing evidence showing that a close relationship exists between ROS accumulation and decreased susceptibility to fungal infection in harvested fruits treated with different elicitors. For examples, higher levels of H 2 O 2 were correlated with lower susceptibility of MeJA-treated loquat fruit to Colletotrichum acutatum, MeJA-treated peach fruit to Penicillium expansum, BTH-treated muskmelon fruit to Trichothecium roseum, and MeJA-treated Chinese bayberries to Penicillium citrinum infections (Cao et al, 2008;Jin et al, 2009;Ren et al, 2012;Wang et al, 2014). These findings suggest that H 2 O 2 may act as a signaling molecule for the induction of disease resistance.…”

Effects of hydrogen sulfide on the surface whitening and physiological responses of fresh‐cut carrots

“…CAT activity was determined as descibed by Ren et al . by monitoring the disappearance of H 2 O 2 and recording the decrease in absorbance at 240 nm.…”