Journal
FOOD CHEMISTRY
Volume 285, Issue -, Pages 163-170Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2019.01.150
Keywords
Elevated CO2; Strawberry fruit; Chlorophyll catabolism; Anthocyanin synthesis
Funding
- Key Research and Development Program of Zhejiang province [2018C02049]
- National Key Research and Development Program of China [2017YFD0401304]
- National Natural Science Foundation of China [31571895, 31772366]
- Weng Hongwu Academic Innovation Research Fund of Peking University
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Colour is an important quality attribute for the consumer's acceptability of fruit. Elevated CO2 was applied to strawberry fruit to explore its influence on chlorophyll catabolism and anthocyanin synthesis. The results showed that 20% CO2 delayed the changes of a* and b* values in strawberry fruit. The degradation of chlorophyll was delayed in CO2 treated fruit by inhibiting the activities of chlorophyllase and down-regulating the expression of FaChl b reductase, FaPAO and FaRCCR. In addition, lower concentration of anthocyanins and lower activity of PAL, C4H, 4CL and CHS were recorded under the effect of 20% CO2. Meanwhile, qRT-PCR analysis showed that 13 genes involved in the phenylpropanoid pathway and the flavonoid biosynthesis pathway were also down-regulated under CO2 stress. However, no residual effect on pigment metabolism was observed when elevated CO2 was removed. Our study provided new insights into the regulation of elevated CO2 in the role of pigment metabolism in postharvest.
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