Journal
FOOD CHEMISTRY
Volume 289, Issue -, Pages 160-168Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2019.03.047
Keywords
Nectarine fruit; Chitosan; Senescence; Redox state; Respiratory pathway
Funding
- Special Fund for Agro-scientific Research in the Public Interest, China [201303075]
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The aim of this study is to investigate the impact of different molecular weights of chitosan treatment (LM 30 kDa; HM 120 kDa) on fruit senescence related to redox state and respiratory pathway metabolism in postharvest nectarine fruit stored at 25 degrees C for 8 days. The treatments of LM and HM chitosan both delayed senescence, which are due to inhibition of respiration rate, and enhanced the antioxidant system, as evidenced by the improvement of ASA-GSH cycle and total phenolics and flavonoids contents and decrease in H2O2 and MDA accumulation. Meanwhile, fruit treated with HM chitosan manifested better quality and redox state than LM. It is noteworthy that the results showed that HM chitosan notably suppressed the activity of SDH enzyme and increased the total activity of G-6-PDH and 6-PGDH. Accordingly, changed respiratory pathways by HM chitosan coating contributed to senescence retardation and modification of redox status in postharvest nectarine fruit.
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