期刊
PHYSIOLOGICAL AND MOLECULAR PLANT PATHOLOGY
卷 127, 期 -, 页码 -出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.pmpp.2023.102082
关键词
Melatonin; Induced resistance; Malus domestica; Blue mold; Phenylpropanoid pathway
Apple fruit is a delicious fruit with great economic value. However, harvested apples are susceptible to the infection of Penicillium expansum, which results in quality degradation. This study found that melatonin treatment can significantly suppress the lesion development of P. expansum-infected apple fruit and improve the accumulation of metabolites in phenylpropanoid metabolism and the activity of key enzymes.
Apple fruit is delicious fruit with great economic value. However, harvested apples are susceptible to the infection of Penicillium expansum, which results in quality degradation. 'Golden Delicious' apples were dipped with melatonin solution to investigate its influence on blue mold and the dynamic changes of the major me-tabolites contents and enzymes activities in phenylpropanoid metabolism. Melatonin markedly suppressed lesion development of P. expansum-inoculated apple fruit. Melatonin dipping also distinctly improved 4-coumarate coenzyme A ligase, cinnamic acid 4-hydroxylase, phenylalanine ammonia lyase, polyphenol oxidase, laccase, glucose-6-phosphate dehydrogenase, and glucose phosphate isomerase activities. Moreover, p-coumaric acid, total phenolic compounds, ferulic acid, flavonoids, erucic acid, caffeic acid, lignin, phenylalanine, tyrosine, and tryptophan contents were also enhanced by melatonin. All these findings indicate that melatonin treatment activates the key enzyme activity in phenylpropanoid metabolism to accelerate metabolites accumulation in apples, therefore inducing resistance to blue mold.
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