湖北农业科学 ›› 2019, Vol. 58 ›› Issue (9): 80-85.doi: 10.14088/j.cnki.issn0439-8114.2019.09.018

• 园艺·特产 • 上一篇    下一篇

烟草不同叶位多酚含量及相关酶活性变化的研究

李晓宁1, 徐兴阳1, 范茂攀, 杨青松3, 赵艳   

  1. 1.云南省烟草公司昆明市公司,昆明 650051;
    2.云南农业大学,a.资源与环境学院;b.农学与生物技术学院,昆明 650201;
    3.云南民族大学民族医药学院,昆明 650500
  • 收稿日期:2018-09-30 出版日期:2019-05-10 发布日期:2019-12-05
  • 通讯作者: 赵 艳(1982-),女,高级实验师,博士,主要从事生物化学的研究工作,(电话)0871-65220462(电子信箱)zhaoyankm@126.com。
  • 作者简介:李晓宁(1981-),女,山西大同人,讲师,硕士,主要从事土壤化学的研究工作,(电话)0871-65227651(电子信箱)14576221@qq.com
  • 基金资助:
    中国烟草总公司云南省公司重点资助项目“基于品牌导向的烟叶定向需求技术研究与应用”(2017YN12)

Changes of polyphenol content and related enzyme activities in different leaf positions of tobacco

LI Xiao-ning1, XU Xing-yang1, FAN Mao-pan, YANG Qing-song3, ZHAO Yan   

  1. 1.Yunnan Tobacco Company Kunming Branch,Kunming 650051,China;
    2a.College of Resources and Environment;
    2b.College of Agronomy and Biotechnology,Yunnan Agricultural University,Kunming 650201,China;
    3.School of Ethnomedicine and Ethnopharmacy,Yunnan Minzu University,Kunming 650500,China
  • Received:2018-09-30 Online:2019-05-10 Published:2019-12-05

摘要: 为分析烟叶在生长过程中的次生代谢物质动态变化特征、相关酶的活性变化规律,以3个烤烟种植试验点的烤烟为研究对象,研究不同叶位烟草叶片多酚类物质含量、抗氧化活性和表达量。结果表明,同一个采样点中,不同叶位烟叶多酚类物质含量表现为上叶位>中叶位>下叶位。不同叶位烟草叶片PAL、PPO、C4H和4CL活性以上叶位最高。通过多酚体外抗氧化测定,表明不同叶位多酚对DPPH和羟基自由基有一定的清除能力。荧光定量PCR检测发现,PAL基因和PPO基因在上叶位中的表达显著高于其他叶位。烤烟生长过程中的次生代谢物质动态变化,相关酶的活性变化及基因表达水平与烟叶成熟度存在一定的关联。

关键词: 烟草, 不同叶位, 多酚, 酶活性, 抗氧化活性

Abstract: Aiming to analyze the dynamic changes of secondary metabolites and related enzymes during tobacco growth, the content, antioxidant activity and expression level of polyphenols in tobacco leaves at different leaf positions were studied in three tobacco planting experimental sites. In the same sampling site, the content of polyphenols in tobacco leaves of different leaf positions showed as follows:upper leaf position>middle leaf position>lower leaf position. The activities of PAL, PPO, C4H and 4CL in tobacco leaves at different positions showed that the enzyme activity in the upper leaves was the highest. The antioxidant activity of polyphenols in vitro showed that polyphenols in different leaf positions had certain scavenging ability to DPPH and hydroxyl free radicals. q-PCR analysis showed that the expression of PAL and PPO genes in the upper leaf was significantly higher than that of other leaf positions. Dynamic changes of secondary metabolites, enzyme activity and gene expression levels were correlated with tobacco maturity during the growth of flue-cured tobacco.

Key words: tobacco, different leaf positions, polyphenols, enzyme activity, antioxidant activity

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