UVA-Radiation Exposure of Different Durations Promoted the Growth, Phytochemicals and Glucosinolate Biosynthesis of Chinese Kale.

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  • Additional Information
    • Source:
      Publisher: MDPI Country of Publication: Switzerland NLM ID: 101092791 Publication Model: Electronic Cited Medium: Internet ISSN: 1422-0067 (Electronic) Linking ISSN: 14220067 NLM ISO Abbreviation: Int J Mol Sci Subsets: MEDLINE
    • Publication Information:
      Original Publication: Basel, Switzerland : MDPI, [2000-
    • Subject Terms:
      Brassica*/metabolism ; Radiation Exposure*; China ; Glucosinolates/metabolism ; Phytochemicals/chemistry
    • Abstract:
      Ultraviolet-A (UVA) (315-400 nm) is an essential environmental signal that regulates plant development and affects phytochemicals biosynthesis, including glucosinolate biosynthesis. The effects of different UVA (380 ± 10 nm, 40 μmol/m 2 /s) exposure durations, including 0 h/d (UV0), 6 h/d (UV6) and 12 h/d (UV12), on the growth and phytochemicals of Chinese kale ( Brassica alboglabra ) under white 250 μmol/m 2 /s LEDs were investigated. UVA exposure of different durations influenced the growth and phytochemicals biosynthesis of Chinese kale. Prolonging UVA irradiation throughout the growth cycle positively affected the growth and the development of Chinese kale, with evident increases in the dry weights of shoots and roots, plant height, stem diameter, specific leaf weight and flower budding rate. The application of UVA increased the soluble sugar content, whereas higher flavonoid content and antioxidant capacity (FRAP) and lower nitrate content were only observed in Chinese kale exposed to UV6 treatment. Besides, the qPCR assay showed that supplemental UVA-radiation exposure up-regulated the gene expressions of UVR8 , transcription factors genes and genes related to the glucosinolate biosynthesis pathway, thereby promoting the accumulation of glucosinolates. Therefore, supplemental UVA-radiation exposure for 12 h/d was more conducive to plant growth, while supplemental UVA-radiation exposure for 6 h/d was better for phytochemical biosynthesis in Chinese kale in an artificial-light plant factory.
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    • Grant Information:
      2021YFD2000701 the National Key Research and Development China Subproject; 2019B020214005 Key Research and Development Program of Guangdong
    • Contributed Indexing:
      Keywords: Chinese kale; UVA; glucosinolate; growth
    • Accession Number:
      0 (Glucosinolates)
      0 (Phytochemicals)
    • Publication Date:
      Date Created: 20220727 Date Completed: 20220728 Latest Revision: 20220731
    • Publication Date:
      20240829
    • Accession Number:
      PMC9320135
    • Accession Number:
      10.3390/ijms23147619
    • Accession Number:
      35886968