論文

査読有り 国際誌
2021年3月

Preharvest long-term exposure to UV-B radiation promotes fruit ripening and modifies stage-specific anthocyanin metabolism in highbush blueberry

Horticulture Research
  • Taishan Li
  • ,
  • Hisayo Yamane
  • ,
  • Ryutaro Tao

8
1
開始ページ
67
終了ページ
67
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1038/s41438-021-00503-4
出版者・発行元
Springer Science and Business Media LLC

<title>Abstract</title>Ultraviolet-B (UV-B) light (280–315 nm) is an important environmental signal that regulates plant development and photomorphogenesis, while also affecting the flavonoid pathway, including anthocyanin biosynthesis. Regarding the effects of UV-B radiation on fruits, the effects of a short-term or postharvest irradiation on fruit quality have been well-documented, but the effects of a long-term preharvest UV-B irradiation on fruit growth and coloration remain unclear. Thus, in this study, we investigated the effects of a long-term treatment involving an environmentally relevant UV-B dose on highbush blueberry (<italic>Vaccinium corymbosum</italic>) fruit. The preharvest UV-B treatment quickly promoted fruit growth and sugar accumulation, which is not commonly observed in other fruit tree species. The UV-B exposure also accelerated fruit ripening and coloration. The dual-luciferase assay proved that in blueberries, expression of <italic>VcUFGT</italic> encoding anthocyanin biosynthesis key enzyme, is positively and negatively regulated by <italic>VcMYBA1</italic> and <italic>VcMYBC2</italic>, respectively. Throughout the fruit development stage, the UV-B treatment up-regulated <italic>VcMYBPA1</italic> expression, which increased <italic>VcUFGT</italic> expression via <italic>VcMYBA1</italic>. In the green fruit stage, the UV-B treatment increased <italic>HY5</italic> encoding UV receptor, which up-regulates <italic>VcMYBPA1</italic> and down-regulates <italic>VcMYBC2</italic>, thereby promotes the accumulation of anthocyanins. On the other hand, excessive anthocyanin synthesis was inhibited by increased <italic>VcMYBC2</italic> levels in mature fruits when exposed to UV-B light through <italic>HY5</italic>-independent pathway. In conclusion, anthocyanin-related MYB activators and repressor may coordinately balance the accumulation of anthocyanins in blueberry fruits, with UV-B treatments possibly influencing their effects in a stage-specific manner. The potential utility of preharvest UV-B treatments for improving blueberry fruit quality is discussed herein.

リンク情報
DOI
https://doi.org/10.1038/s41438-021-00503-4
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/33790261
PubMed Central
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8012384
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000636340500004&DestApp=WOS_CPL
URL
http://www.nature.com/articles/s41438-021-00503-4.pdf
URL
http://www.nature.com/articles/s41438-021-00503-4
ID情報
  • DOI : 10.1038/s41438-021-00503-4
  • ISSN : 2662-6810
  • eISSN : 2052-7276
  • PubMed ID : 33790261
  • PubMed Central 記事ID : PMC8012384
  • Web of Science ID : WOS:000636340500004

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