Botrytis cinerea

Botrytis

Gene

Ecology

Biology

Abiotic component

Hydrogen peroxide

Methyl jasmonate

Endocrinology

Lipoxygenase

Signal transduction

Biochemistry

Botany

Plant disease resistance

Paleontology

Salicylic acid

Antioxidant

Enzyme

Melatonin

Jasmonic acid

Journal of Agricultural and Food Chemistry

Melatonin acts as a crucial signaling molecule with multiple physiological functions in plant response to abiotic and biotic stresses. However, the impact and regulatory mechanism of melatonin on attenuating tomato fruit fungal decay are unclear. In this study, we investigated the potential roles of melatonin in modulating fruit resistance to Botrytis cinerea and explored related physiological and molecular mechanisms. The results revealed that disease resistance was strongly enhanced by melatonin treatment, and 50 μM was confirmed as the best concentration. Melatonin treatment increased the activities of defense-related enzymes and decreased hydrogen peroxide (H2O2) content with enhanced antioxidant enzyme activities. Moreover, we found that melatonin treatment increased methyl jasmonate (MeJA) content; up-regulated the expressions of SlLoxD, SlAOC, and SlPI II; and reduced the expressions of SlMYC2 and SlJAZ1. We postulated that melatonin played a positive role in tomato fruit resistance to Botrytis cinerea through regulating H2O2 level and JA signaling pathway.

Melatonin Induces Disease Resistance to <i>Botrytis cinerea</i> in Tomato Fruit by Activating Jasmonic Acid Signaling Pathway

Melatonin Induces Disease Resistance to Botrytis cinerea in Tomato Fruit by Activating Jasmonic Acid Signaling Pathway