Journal
FOOD CHEMISTRY
Volume 358, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2021.129867
Keywords
Chilling injury; DREB1; Internal browning; Salicylic acid; Soluble sugars; Sucrose
Funding
- National Natural Science Foundation of China [31871862]
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Pre-treatment with salicylic acid can delay and reduce chilling injury in peaches by increasing sucrose content and activating cold response genes.
Peach fruit stored in the cold are susceptible to chilling injury. A pre-storage treatment with the natural hormone salicylic acid can alleviate chilling damage, although the mechanism is unclear. We found that a treatment with 1 mu mol L-1 salicylic acid for 15 min prior to storage at 4 degrees C delayed and reduced fruit internal browning, a symptom of chilling injury. Salicylic acid had a large effect on sugar metabolism, increasing total soluble sugars via a substantial increase in sucrose content. The transcript abundance of genes related to sucrose biosynthesis and degradation was significantly regulated by salicylic acid, consistent with the changes in sucrose content. Salicylic acid treatment also increased the expression of two DREB cold stress-related proteins, transcriptional activators that regulate cold resistance pathways. The results show that salicylic acid alleviates chilling injury in peach by multiple mechanisms, including an increased content of sucrose and activation of cold response genes.
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