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Physiological and transcriptomic analysis of 'Whangkeumbae' pear core browning during low-temperature storage

文献类型： 外文期刊

作者： Zhou, Hongsheng 1 ; Tian, Mengyao 3 ; Huang, Wen 4 ; Luo, Shufen 1 ; Hu, Huali 1 ; Zhang, Yingtong 1 ; Zhang, Leigang; 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Agr Prod Proc, 50 Zhongling St, Nanjing 210014, Jiangsu, Peoples R China

2.Jiangsu Key Lab Hort Crop Genet Improvement, Nanjing 210014, Jiangsu, Peoples R China

3.Shenyang Agr Univ, Dept Food Sci, Shenyang 110866, Liaoning, Peoples R China

4.Nanjing Inst Vegetable Sci, Nanjing 210042, Jiangsu, Peoples R China

5.Jiangsu Univ, Sch Food & Biol Engn, Zhenjiang 212013, Jiangsu, Peoples R China

关键词： 'Whangkeumbae' pear; Core browning; Physiological responses; Transcriptome; Differentially expressed genes; Correlation analysis

期刊名称：GENE EXPRESSION PATTERNS （ 影响因子：1.224； 五年影响因子：1.478 ）

ISSN： 1567-133X

年卷期： 2020 年 36 卷

页码：

收录情况： SCI

摘要： Core browning of 'Whangkeumbae' pear has become an urgent problem in the Chinese pear industry, which often appears after several months of low-temperature storage. However, little is known regarding the crosstalk between physiology and molecular mechanisms regulating the core browning process of the pear. In this study, the physiological and genetic responses of the core were identified during storage. The results showed that the malonyldialdehyde (MDA) content, electrolyte leakage, hydrogen peroxide (H2O2) content and superoxide anion (O-2 center dot(-)) production rate progressively increased during the browning process. Polyphenoloxidase (PPO), phospholipase D (PLD) and lipoxygenase (LOX) activity initially slightly increased but then sharply increased during the later storage stage. A total of 33,265 unigenes was generated via high-throughput sequencing, and 5121 differentially expressed genes (DEGs) were identified. These DEGs were functionally annotated and some core browning-related DEGs involved in the redox reaction, membrane lipid metabolism and enzymatic browning were also determined. We found that the changes in the gene expression accorded with the physiological variation, indicating the close crosstalk between physiological and genetic response during storage. Our study provides a basis for future research on the core browning mechanism during pear storage.

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