Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 70, Issue 18, Pages 5658-5667Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.2c01102
Keywords
apple fruit; trehalose; blue mold; induced resistance; energy metabolism
Funding
- National Natural Science Foundation of China [31801595]
- Innovation Foundation for Postgraduate Student of Bohai University [YJC2021-045]
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Trehalose treatment reduces lesion diameter in apples inoculated with Penicillium expansum and improves tolerance by regulating starch, sorbitol, and energy metabolism.
The efficacy of trehalose on the lesion diameter of apples (cv. Golden Delicious) inoculated with Penicillium expansum was evaluated to screen the optimal concentration. The changes in gene expression and activity of the enzyme in starch, sorbitol, and energy metabolism were also investigated in apples after trehalose treatment. The results revealed that trehalose dipping reduced the lesion diameter of apples inoculated with P. expansum. Trehalose suppressed the activities and gene expressions of beta-amylase, NAD-sorbitol dehydrogenase, and NADP-sorbitol dehydrogenase, whereas it decreased the sorbitol 6-phosphate dehydrogenase gene expression and amylose, amylopectin, total starch, and reducing sugar contents. Additionally, trehalose improved the gene expressions and activities of alpha-amylase, starch-branching enzymes, total amylase, H+-ATPase, and Ca2+-ATPase, as well as soluble sugar, adenosine triphosphate, and adenosine diphosphate contents and energy charge in apples. These findings imply that trehalose could induce tolerance to the blue mold of apple fruit by regulating starch, sorbitol, and energy metabolism.
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