Methyl jasmonate induces the resistance of postharvest blueberry to gray mold caused by Botrytis cinerea.
J Sci Food Agric
; 100(11): 4272-4281, 2020 Aug 30.
Article
em En
| MEDLINE
| ID: mdl-32378217
ABSTRACT
BACKGROUND:
The effects of postharvest methyl jasmonate (MeJA) treatment (50 µmol L-1 ) on the control of gray mold caused by Botrytis cinerea in blueberry fruit were evaluated by analyzing (i) the levels of disease resistance signals; (ii) the activity of enzymes involved in antioxidant system, disease resistance and phenylpropanoid pathway, and (iii) the secondary metabolite content.RESULTS:
The results indicated that MeJA treatment significantly restrained the development of gray mold decay in blueberries. The treatment induced a nitric oxide (NO) burst and increased the endogenous hydrogen peroxide (H2 O2 ) content in the earlier period of storage. The enhanced NO and H2 O2 generation by MeJA treatment might serve as a signal to induce resistance against B. cinerea infection. Furthermore, in inoculated fruit, MeJA treatment significantly promoted antioxidant enzymes and defense-related enzyme activity, which included superoxide dismutase, catalase, ascorbate peroxidase, chitinase, and ß-1,3-glucanase, and the degree of membrane lipid peroxidation was reduced. The MeJA treatment enhanced the phenylpropanoid pathway by provoking phenylalanine ammonialyase, cinnamate 4-hydroxylase, and 4-coumarate CoA ligase activity, which was accompanied by elevated levels of phenolics and flavonoids in blueberry fruit.CONCLUSION:
These results suggested that MeJA could induce the disease resistance of blueberries against B. cinerea by regulating the antioxidant enzymes, defense-related enzymes, and the phenylpropanoid pathway through the activation of signaling molecules.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Doenças das Plantas
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Botrytis
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Ciclopentanos
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Mirtilos Azuis (Planta)
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Oxilipinas
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Acetatos
Idioma:
En
Revista:
J Sci Food Agric
Ano de publicação:
2020
Tipo de documento:
Article