Different response to 1-methylcyclopropene in two cultivars of Chinese pear fruit with contrasting softening characteristics
文献类型： 外文期刊
作者： Wei, Jianmei 1 ; Cheng, Yudou 1 ; Feng, Yunxiao 1 ; Qi, Xiudong 4 ; He, Jingang 1 ; Guan, Junfeng 1 ;
作者机构： 1.Hebei Acad Agr & Forestry Sci, Inst Genet & Physiol, Shijiazhuang, Hebei, Peoples R China
2.Hebei Univ Environm Engn, Qinhuangdao, Hebei, Peoples R China
3.Plant Genet Engn Ctr Hebei Prov, Shijiazhuang, Hebei, Peoples R China
4.Hebei Normal Univ Sci & Technol, Qinhuangdao, Hebei, Peoples R China
关键词： pear; 1-methylcyclopropene; softening; cell wall enzyme; gene expression
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： 2019 年 92 卷
页码：
收录情况： SCI
摘要： In this study, the change in softening and its related genes expression under influence of 500 nl L-1 1-methylcyclopropene (1-MCP) was assessed in the two Chinese pear fruit, 'Jingbaili' (Pyrus ussuriensis Maxim) and 'Yali' (Pyrus bretschneideri Rehd), which exhibit different softening characteristics. 'Jingbaili' pear fruit softened rapidly after harvest, and was strongly inhibited by 1-MCP. In contrast, there was no obvious change of firmness compared to the control after 1-MCP treatment in 'Yali' pear fruit. The respiration and ethylene production rates were reduced by 1-MCP at early storage in both two cultivars. 'Jingbaili' pear fruit exhibited dramatically increased expression levels of the softening-related genes, i.e., polygalacturonase1 (PG1), polygalacturonase2 (PG2), beta-Galactosidase4 (GAL4), alpha-arabinofuranosidase1 (ARF1) and alpha-arabinofuranosidase2 (ARF2), and these genes' expression levels were significantly decreased by 1-MCP treatment. In contrast, 'Yali' pear fruit showed lower expression levels of the above-mentioned genes, as well as a relatively smaller inhibition effect by 1-MCP treatment before day 27. These results suggest that 'Jingbaili' pear fruit are more sensitive to 1-MCP/ethylene than 'Yali' pear fruit during ripening.
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