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首页 > 过刊浏览>2020年第21卷第3期 >734-742. DOI:10.13430/j.cnki.jpgr.20190731001 优先出版
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苹果脂氧合酶基因 MdLOX1a 的同源克隆与功能验证
DOI:
10.13430/j.cnki.jpgr.20190731001
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作者:
  • 岳璇璇

    岳璇璇

    山东农业大学园艺科学与工程学院/作物生物学国家重点实验室
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  • 王庆鹏

    王庆鹏

    山东农业大学园艺科学与工程学院/作物生物学国家重点实验室
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  • 房鸿成

    房鸿成

    山东农业大学园艺科学与工程学院/作物生物学国家重点实验室
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  • 胡甲飞

    胡甲飞

    山东农业大学园艺科学与工程学院/作物生物学国家重点实验室
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  • 苏梦雨

    苏梦雨

    山东农业大学园艺科学与工程学院/作物生物学国家重点实验室
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  • 张宗营

    张宗营

    山东农业大学园艺科学与工程学院/作物生物学国家重点实验室
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  • 王楠

    王楠

    山东农业大学园艺科学与工程学院/作物生物学国家重点实验室
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  • 陈学森

    陈学森

    山东农业大学园艺科学与工程学院/作物生物学国家重点实验室
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作者单位:

山东农业大学园艺科学与工程学院/作物生物学国家重点实验室

作者简介:

通讯作者:

中图分类号:

基金项目:

国家自然科学基金(31730080,31701892);国家重点研究计划项目(2016YFC0501505)


Homologous Cloning and Expression Analysis of Apple Lipoxygenase Gene MdLOX1a
Author:
  • YUE Xuan-xuan

    YUE Xuan-xuan

    College of Horticulture Science and Engineering, Shandong Agricultural University / State Key Laboratory of Crop Biology
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  • WANG Qing-peng

    WANG Qing-peng

    College of Horticulture Science and Engineering, Shandong Agricultural University / State Key Laboratory of Crop Biology
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  • FANG Hong-cheng

    FANG Hong-cheng

    College of Horticulture Science and Engineering, Shandong Agricultural University / State Key Laboratory of Crop Biology
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  • HU Jia-fei

    HU Jia-fei

    College of Horticulture Science and Engineering, Shandong Agricultural University / State Key Laboratory of Crop Biology
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  • SU Meng-yu

    SU Meng-yu

    College of Horticulture Science and Engineering, Shandong Agricultural University / State Key Laboratory of Crop Biology
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  • ZHANG Zong-ying

    ZHANG Zong-ying

    College of Horticulture Science and Engineering, Shandong Agricultural University / State Key Laboratory of Crop Biology
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  • WANG Nan

    WANG Nan

    College of Horticulture Science and Engineering, Shandong Agricultural University / State Key Laboratory of Crop Biology
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  • CHEN Xue-sen

    CHEN Xue-sen

    College of Horticulture Science and Engineering, Shandong Agricultural University / State Key Laboratory of Crop Biology
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Affiliation:

College of Horticulture Science and Engineering, Shandong Agricultural University / State Key Laboratory of Crop Biology

Fund Project:

the National Natural Science Foundation of China (31730080,31701892); the National Key Research and Development Project (2016YFC0501505)

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    摘要:

    脂氧合酶是脂肪酸代谢途径中的关键酶,在植物生长发育、响应环境胁迫、合成香气物质等方面起着重要作用。 本试验以‘紫红 3 号’叶片诱导出的红色愈伤组织为试材,对 MdLOX1a 基因及其部分启动子序列进行扩增。测序发现 MdLOX1a 的开放阅读框为 2592 bp,编码 863 个氨基酸,预测其蛋白分子量为 97.69 KDa,等电点为 5.14。MdLOX1a 定位于苹果基因组 的第 9 号染色体,由 8 个外显子与 7 个内含子构成。氨基酸序列进化树分析表明,MdLOX1a 与 Pb9S-LOX5 在同一进化枝。此 外,克隆获得 MdLOX1a 启动子序列 1058 bp,启动子元件预测表明该启动子包括响应多种胁迫的顺式作用元件。亚细胞定位发 现,MdLOX1a 在细胞膜与细胞核上均有定位。组织差异分析表明,MdLOX1a 基因在果皮中的表达量最高,在花和果肉中次之; 同时随着果实成熟 MdLOX1a 基因的表达量上调并且持续光照能够诱导 MdLOX1a 基因表达,低温(16 ℃)以及不同浓度的外源 ABA 处理后,MdLOX1a 基因的表达量均明显降低。过表达 MdLOX1a 验证发现较于对照组,实验组香气各成分有不同程度增加, 说 明 MdLOX1a 与香气物质的合成有关。

    关键词:苹果;MdLOX1a;表达分析;亚细胞定位;功能验证
    Abstract:

    Lipoxygenase is a key enzyme involved in the pathway of fatty acid metabolism, and plays an important role in the growth and development of plants, responses to environmental stresses and the synthesis of aroma components. In this study, the red callus from the leaves of 'Zihong 3' was used for PCR amplification of the MdLOX1a gene and its partial promoter sequence. Sequencing analysis revealed that MdLOX1a has an open reading frame of 2592 bp encoding for 863 deduced amino acids, with a predicted protein molecular weight of 97.69 KDa and the isoelectric point of 5.14. The MdLOX1a gene was found to be localized on chromosome 9 of the apple genome, consisting of 8 exons and 7 introns. Phylogenetic tree analysis with amino acid sequence indicated that MdLOX1a and Pb9S-LOX5 were assigned within the same branch. In addition, we obtained the MdLOX1a promoter sequence with a length of 1058 bp, which contained several cis-acting elements in response to various stresses. Subcellular localization revealed that MdLOX1a was localized on both the cell membrane and the nucleus. The tissue disparity analysis showed that the expression level of MdLOX1a gene was abundant in the pericarp, followed by flower and pulp. The expression of MdLOX1a gene gradually increased with fruit ripening, and its transcription has been induced under continuous light treatment. The expression of MdLOX1a gene was significantly reduced after low temperature (16 ℃) and exogenous ABA treatment at different concentrations. The overexpression of MdLOX1a showed that the transgenic lines showed the induction of the aromatic components in relative to the control lines, suggesting that MdLOX1a might associate with the synthesis of aroma components.

    Key words:apple; MdLOX1a; expression analysis; subcellular localization; functional verification
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岳璇璇,王庆鹏,房鸿成,等.苹果脂氧合酶基因 MdLOX1a 的同源克隆与功能验证[J].植物遗传资源学报,2020,21(3):734-742.

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  • 收稿日期:2019-07-31
  • 最后修改日期:2020-03-17
  • 录用日期:2019-10-09
  • 在线发布日期: 2020-05-18
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