Effects of 1-methylcyclopropene on superficial scald and related metabolism in 'Wujiuxiang' pear during cold storage
文献类型： 外文期刊
作者： Gao, Manman 1 ; Zhou, Shuo 1 ; Guan, Junfeng 1 ; Zhang, Yingying 1 ;
作者机构： 1.Hebei Acad Agr & Forestry Sci, Inst Genet & Physiol, Shijiazhuang, Peoples R China
2.Plant Genet Engn Ctr Hebei Prov, Shijiazhuang, Peoples R China
期刊名称：JOURNAL OF APPLIED BOTANY AND FOOD QUALITY （ 影响因子：1.451； 五年影响因子：1.73 ）
ISSN： 1439-040X
年卷期： 2015 年 88 卷
页码：
收录情况： SCI
摘要： 'Wujiuxiang' (Pyrus bretschneideri R. x Pyrus communis L.) pear often suffers from superficial scald after a long-term of cold storage. In this study, harvested 'Wujiuxiang' pear fruits were fumigated with 1-methylcyclopropene (1-MCP) at concentrations of 0.5 mu L/L and 1.0 mu L/L and subsequently stored at low temperature (0 degrees C). The superficial scald index; flesh firmness; total soluble solids (TSS) content; respiration and ethylene production rates; relative membrane permeability; contents of alpha-farnesene, conjugated trienols (CTols) and hydrogen peroxide (H2O2); and activities of superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), and lipoxygenase (LOX) of the peel were investigated. The results showed that compared with control, 1-MCP reduced the index of superficial scald; maintained a higher firmness and a lower TSS content; inhibited the accumulation of H2O2, alpha-farnesene and conjugated trienols and the increase in cell membrane permeability; and maintained a higher activity of APX, SOD and CAT and a lower activity of LOX. These findings indicate that 1-MCP regulates the activities of H2O2-scavenging enzymes to inhibit the accumulation of H2O2 and thereby reduces cell membrane damage and inhibits the accumulation of conjugated trienols. Thus, 1-MCP could decrease the incidence of superficial scald in 'Wujiuxiang' pear.
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