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草业学报 ›› 2021, Vol. 30 ›› Issue (3): 158-166.DOI: 10.11686/cyxb2020147

• 研究论文 • 上一篇    下一篇

不同干燥方式对苜蓿种子代谢物的影响

张迪1,2(), 任立飞1, 刘广彬3, 罗伏青4, 张文浩1, 王天佐1()   

  1. 1.中国科学院植物研究所,北京 100093
    2.中国科学院大学生命科学学院,北京 100049
    3.青岛科技大学机电工程学院,山东 青岛 266061
    4.袁隆平农业高科技股份有限公司,湖南 长沙 410001
  • 收稿日期:2020-03-31 修回日期:2020-06-04 出版日期:2021-03-20 发布日期:2021-03-09
  • 通讯作者: 王天佐
  • 作者简介:Corresponding author. E-mail: tzwang@ibcas.ac.cn
    张迪(1997-),女,河南新野人,在读硕士。E-mail: zhangdi@ibcas.ac.cn
  • 基金资助:
    国家重点研发计划(2018YFD0700202);国家自然科学基金(32070351)

Comparative metabolite profiling of alfalfa seeds dried at different temperatures

Di ZHANG1,2(), Li-fei REN1, Guang-bin LIU3, Fu-qing LUO4, Wen-hao ZHANG1, Tian-zuo WANG1()   

  1. 1.Institute of Botany,Chinese Academy of Sciences,Beijing 100093,China
    2.University of Chinese Academy of Sciences,College of Life Sciences,Beijing 100049,China
    3.Qingdao University of Science and Technology,College of Electromechanical Engineering,Qingdao 266061,China
    4.Yuan Longping High-tech Agriculture Company Limited,Changsha 410001,China
  • Received:2020-03-31 Revised:2020-06-04 Online:2021-03-20 Published:2021-03-09
  • Contact: Tian-zuo WANG

摘要:

以中科1号黄花苜蓿为材料,研究了不同干燥方式对苜蓿种子萌发率的影响;并采用非靶向代谢组学技术,利用高效液相色谱串联质谱的方法,分析了自然干燥、39 ℃干燥和65 ℃干燥3种干燥方式下苜蓿种子代谢物的变化。结果发现,39 ℃为不影响苜蓿种子萌发率的最高干燥温度,65 ℃干燥可使苜蓿种子萌发率下降50%;39 ℃干燥和自然干燥相对于新鲜种子产生的差异代谢物最相近,65 ℃干燥造成的代谢物差异较大;核苷、核苷酸及类似物是高温干燥造成的种子差异代谢物中最大的一类,其次为脂类及类脂分子和有机酸及其衍生物;高温干燥对种子嘌呤代谢途径影响最大。研究结果从代谢的角度阐明了高温干燥造成苜蓿种子萌发率降低的机理,为苜蓿种子干燥设备的设计提供了理论基础。

关键词: 苜蓿, 萌发率, 代谢组学, 种子干燥

Abstract:

The present study explored the effects of different drying methods on the seed germination rate of Medicago falcata ‘Zhongke No.1’. High performance liquid chromatography and tandem mass spectrometry were used to analyze the different metabolites produced during natural drying of alfalfa seeds at 39 and 65 ℃. It was found that 39 ℃ was the highest drying temperature which did not affect the seed germination rate and drying at 65 ℃ reduced the germination rate of alfalfa seeds by half. Drying at 39 ℃ and natural drying were similar in terms of the change in metabolites detected before and after drying. However, drying at 65 ℃ induced a larger change in the metabolite profile of seeds. Based on analysis of metabolome data, nucleosides, nucleotides, and their analogues was altered most significantly by high temperature, and lipids and lipid-like molecules followed. The purine?metabolism pathway in seeds was acutely affected by drying at high temperature. The findings of this study elucidate, in terms of different metabolites present, the reasons for low germination rate after high temperature drying, and provide a theoretical basis for improving the design of equipment for alfalfa seed drying.

Key words: alfalfa, germination rate, metabolite, seed drying