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Peer-reviewedCC BY-NC-NDBMC plant biology

FabHLH130-FaSPS1/FaINV positively contributes to the sugar accumulation in strawberry fruits.

  • Yanhong Song1,2
  • Lifeng Liu1
  • Luyi Zhao1,2
  • Wenting Zheng1
  • Pan Song1
  • Xia Zhao1
  • Gang Li1,2
  • Houcheng Zhou3,4
4 affiliations
  1. 1National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Gangwan Road No.28, Guancheng Region, Zhengzhou, 450009, China.
  2. 2Zhongyuan Research Center, Chinese Academy of Agricultural Sciences, Hongqiqu Road NO.28, Pingyuan shifan Region, Xinxiang, Henan, 453500, China.
  3. 3National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Gangwan Road No.28, Guancheng Region, Zhengzhou, 450009, China. [email protected].
  4. 4Zhongyuan Research Center, Chinese Academy of Agricultural Sciences, Hongqiqu Road NO.28, Pingyuan shifan Region, Xinxiang, Henan, 453500, China. [email protected].
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Abstract

Background

Soluble sugars play a crucial role as a carbon and energy source, with their content and composition governing the flavor profile of fruits. Yet how the contents of glucose, sucrose, and fructose are regulated remains poorly understood.Results

In this study, we identified FabHLH130 as a positive regulator in the sucrose metabolism of 'Snow Princess' fruits. We generated FabHLH130 overexpression lines in the octoploid cultivar 'Benihoppe'. Transcriptome analysis reveals higher expression levels of FaSPS1 and FaINV in the sucrose metabolism pathway related to WT. Moreover, the electrophoretic mobility shift and dual-luciferase assays validated that FabHLH130 directly binds to the promoters of FaSPS1 and FaINV, leading to the positive regulation of their expression and enzyme activity. Compared to the WT, the transgenic lines displayed higher total soluble sugar, glucose, sucrose, and fructose contents.Conclusions

Our findings provide insights into the mechanism by which FabHLH130 is associated with sugar accumulation in strawberry fruits and provide a theoretical foundation for understanding soluble sugar metabolism in plants.

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Cite

BibTeXRIS
BibTeX
@article{song2026fabhlh130fasps1fainv,
  title = {{FabHLH130-FaSPS1/FaINV positively contributes to the sugar accumulation in strawberry fruits.}},
  author = {Yanhong Song and Lifeng Liu and Luyi Zhao and Wenting Zheng and Pan Song and Xia Zhao and Gang Li and Houcheng Zhou},
  journal = {BMC plant biology},
  year = {2026},
  month = jul,
  doi = {10.1186/s12870-026-09621-4},
  url = {https://europepmc.org/article/MED/42902130},
  note = {CC BY-NC-ND},
}
RIS
TY  - JOUR
TI  - FabHLH130-FaSPS1/FaINV positively contributes to the sugar accumulation in strawberry fruits.
AU  - Yanhong Song
AU  - Lifeng Liu
AU  - Luyi Zhao
AU  - Wenting Zheng
AU  - Pan Song
AU  - Xia Zhao
AU  - Gang Li
AU  - Houcheng Zhou
PY  - 2026
DA  - 2026/07/01
JO  - BMC plant biology
DO  - 10.1186/s12870-026-09621-4
UR  - https://europepmc.org/article/MED/42902130
AB  - Background  Soluble sugars play a crucial role as a carbon and energy source, with their content and composition governing the flavor profile of fruits. Yet how the contents of glucose, sucrose, and fructose are regulated remains poorly understood.Results  In this study, we identified FabHLH130 as a positive regulator in the sucrose metabolism of 'Snow Princess' fruits. We generated FabHLH130 overexpression lines in the octoploid cultivar 'Benihoppe'. Transcriptome analysis reveals higher expression levels of FaSPS1 and FaINV in the sucrose metabolism pathway related to WT. Moreover, the electrophoretic mobility shift and dual-luciferase assays validated that FabHLH130 directly binds to the promoters of FaSPS1 and FaINV, leading to the positive regulation of their expression and enzyme activity. Compared to the WT, the transgenic lines displayed higher total soluble sugar, glucose, sucrose, and fructose contents.Conclusions  Our findings provide insights into the mechanism by which FabHLH130 is associated with sugar accumulation in strawberry fruits and provide a theoretical foundation for understanding soluble sugar metabolism in plants.
SN  - 1471-2229
ER  -