4.7 Article

Application of Exogenous Melatonin Improves Tomato Fruit Quality by Promoting the Accumulation of Primary and Secondary Metabolites

期刊

FOODS
卷 11, 期 24, 页码 -

出版社

MDPI
DOI: 10.3390/foods11244097

关键词

melatonin; tomato fruit; sugars; organic acids; amino acids; phenolic acids and flavonoids; E-nose; sucrose metabolism

资金

  1. Education Science and Technology Innovation Project of Gansu Province [GSSYLXM-02]
  2. Special Project of Central Government Guiding Local Science and Technology Development [ZCYD-2021-07]
  3. Gansu Provincial Natural Science Foundation [20JR10RA552]
  4. Special Fund for Talent of Gansu Agricultural University [GAU-KYQD-2019-19]
  5. Gansu Top Leading Talent Plan [GSBJLJ-2021-14]

向作者/读者索取更多资源

The application of melatonin can improve the quality and flavor of tomato fruit by regulating the accumulation of primary and secondary metabolites during fruit ripening.
Melatonin plays key roles in improving fruit quality and yield by regulating various aspects of plant growth. However, the effects of how melatonin regulates primary and secondary metabolites during fruit growth and development are poorly understood. In this study, the surfaces of tomato fruit were sprayed with different concentrations of melatonin (0, 50, and 100 mu mol center dot L-1) on the 20th day after anthesis; we used high-performance liquid chromatography (HPLC) and liquid chromatography/mass spectrometry (LC/MS) to determine the changes in primary and secondary metabolite contents during fruit development and measured the activity of sucrose metabolizing enzymes during fruit development. Our results showed that 100 mu mol center dot L-1 melatonin significantly promoted the accumulation of soluble sugar in tomato fruit by increasing the activities of sucrose synthase (SS), sucrose phosphate synthase (SPS), and acid convertase (AI). The application of 100 mu mol center dot L-1 melatonin also increased the contents of ten amino acids in tomato fruit as well as decreased the contents of organic acids. In addition, 100 mu mol center dot L-1 melatonin application also increased the accumulation of some secondary metabolites, such as six phenolic acids, three flavonoids, and volatile substances (including alcohols, aldehydes, and ketones). In conclusion, melatonin application improves the internal nutritional and flavor quality of tomato fruit by regulating the accumulation of primary and secondary metabolites during tomato fruit ripening. In the future, we need to further understand the molecular mechanism of melatonin in tomato fruit to lay a solid foundation for quality improvement breeding.

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