Structure, evolution, and roles of SWEET proteins in growth and stress responses in plants

Structure, evolution, and roles of SWEET proteins in growth and stress responses in plants

Carbohydrates are exported by the SWEET family of transporters, which is a novel class of carriers that can transport sugars across cell membranes and facilitate sugar's long-distance transport from source to sink organs in plants. SWEETs play crucial roles in a wide range of physiologically im...

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Bibliographic Details
Published in:International journal of biological macromolecules 2024-04, Vol.263 (Pt 2), p.130441-130441, Article 130441
Main Authors: Zhu, Yongxing, Tian, Ye, Han, Shuo, Wang, Jie, Liu, Yiqing, Yin, Junliang
Format: Article
Language:eng
Subjects:
Abiotic stress
Carbohydrates
Gene Expression Regulation, Plant
Membrane Transport Proteins - genetics
Phylogeny
Plant Proteins - chemistry
Plants - genetics
Plants - metabolism
Source–sink relationship
Sugar transporters
Sugars - metabolism
SWEET
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Summary:Carbohydrates are exported by the SWEET family of transporters, which is a novel class of carriers that can transport sugars across cell membranes and facilitate sugar's long-distance transport from source to sink organs in plants. SWEETs play crucial roles in a wide range of physiologically important processes by regulating apoplastic and symplastic sugar concentrations. These processes include host-pathogen interactions, abiotic stress responses, and plant growth and development. In the present review, we (i) describe the structure and organization of SWEETs in the cell membrane, (ii) discuss the roles of SWEETs in sugar loading and unloading processes, (iii) identify the distinct functions of SWEETs in regulating plant growth and development including flower, fruit, and seed development, (iv) shed light on the importance of SWEETs in modulating abiotic stress resistance, and (v) describe the role of SWEET genes during plant-pathogen interaction. Finally, several perspectives regarding future investigations for improving the understanding of sugar-mediated plant defenses are proposed.
ISSN:0141-8130
1879-0003