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Author Spotlight: Soybean Hairy Root Transformation for the Analysis of Gene Function
Published on: May 5, 2023
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Sugar Transporter GmSWEET38 Controls Nodule Development and Seed Yield in Soybean
Lin Zhu1,2,3, Dan Liu1,2,3, Yunzhen Wu1,2,3
1State Key Laboratory of Crop Genetics and Germplasm Enhancement and Utilization, College of Life Sciences, Nanjing Agricultural University, Nanjing, China.
Plant, Cell & Environment
|November 3, 2025
Summary
Researchers identified a soybean sugar transporter, GmSWEET38, crucial for moving sugars to seeds and nodules. This discovery offers potential for breeding higher-yielding soybean crops by optimizing sugar allocation and nitrogen fixation.
Area of Science:
- Plant Biology
- Molecular Genetics
- Agricultural Science
Background:
- Sugar transport between plant tissues is vital for growth, development, and crop yield.
- Key genetic and environmental factors influencing sugar transport remain largely unidentified.
Purpose of the Study:
- To identify and characterize novel genes involved in sugar translocation in soybean.
- To investigate the role of identified sugar transporters in seed and nodule development.
Main Methods:
- Gene identification and characterization.
- Functional analysis using Xenopus oocytes for transporter activity.
- Expression analysis in soybean tissues.
- Overexpression and gene-knockout studies in soybean.
Main Results:
- Identified GmSWEET38, a plasma membrane-localized sugar transporter facilitating sucrose and fructose translocation.
- GmSWEET38 expression is prominent in the vascular system of roots and nodules.
- Overexpression of GmSWEET38 increased root and seed sugar content, enhancing nodule and seed production.
- GmSWEET38 facilitates fructose transport into the rhizosphere, supporting beneficial bacteria.
Conclusions:
- GmSWEET38 plays a critical role in soybean seed and nodule development by regulating sugar allocation.
- Modulating GmSWEET38 activity can enhance symbiotic nitrogen fixation, leading to improved soybean yield.
- GmSWEET38 is a promising target for breeding high-yielding soybean cultivars.
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