The SWEET14 sugar transporter mediates mycorrhizal symbiosis and carbon allocation in Dendrobium officinale
文献类型： 外文期刊
作者： Li, Liumin 1 ; Wang, Xueying 1 ; Li, Hua 2 ; Ali, Muhammad Moaaz 1 ; Hu, Xiaobo 1 ; Oelmuller, Ralf 1 ; Yousef, Ahmed Fathy 5 ; Alrefaei, Abdulwahed Fahad 7 ; Liu, Jianfu 2 ; Chen, Faxing 1 ;
作者机构： 1.Fujian Agr & Forestry Univ, Coll Hort, Fuzhou 350002, Fujian, Peoples R China
2.Huaqiao Univ, Inst Hort Sci & Engn, Xiamen 361021, Fujian, Peoples R China
3.Hainan Univ, Sch Life & Hlth Sci, Haikou 570228, Hainan, Peoples R China
4.Friedrich Schiller Univ Jena, Matthias Schleiden Inst, Plant Physiol, Dornburgerstr 159, D-07743 Jena, Germany
5.Univ Al Azhar, Coll Agr, Dept Hort, Assiut Branch, Assiut 71524, Egypt
6.Chinese Acad Agr Sci, Zhengzhou Fruit Res Inst, Natl Key Lab Germplasm Innovat & Utilizat Hort Cro, Zhengzhou 450009, Henan, Peoples R China
7.King Saud Univ, Dept Zool, Coll Sci, POB 62521, Riyadh 11451, Saudi Arabia
关键词：
期刊名称：BMC PLANT BIOLOGY （ 影响因子：4.8； 五年影响因子：5.4 ）
ISSN： 1471-2229
年卷期： 2025 年 25 卷 1 期
页码：
收录情况： SCI
摘要： Orchid mycorrhizal (OM) fungi form mutualistic relationships with orchids, facilitating the uptake of minerals from the soil in exchange for sugars and lipids provided by the plant. In this study, we explored the role of the DoSWEET14 sugar transporter in Dendrobium officinale during OM symbiosis. Transcriptome sequencing revealed significant changes in gene expression in mycorrhizal roots, particularly the upregulation of DoSWEET14. Subcellular localization studies confirmed that DoSWEET14 is localized to the plasma membrane, suggesting its involvement in nutrient exchange between the orchid and OM fungi. Complementation assays using a yeast strain deficient in hexose transport demonstrated that DoSWEET14 has broad substrate specificity, efficiently transporting multiple monosaccharides. Additionally, overexpression of DoSWEET14 in Arabidopsis increased sugar content without affecting biomass, supporting its role in carbohydrate transport and storage during symbiosis. These findings suggest that DoSWEET14 plays a key role in regulating carbon allocation and stabilizing the mutualistic relationship between Dendrobium officinale and OM fungi.
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