ArticleJournal of experimental botany2019
SlSWEET1a is involved in glucose import to young leaves in tomato plants.
Article in Journal of experimental botany, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers.
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28 citing papers in PubMed, 81 citations in OpenAlex.
- Molecular mechanisms and evolutionary adaptations of transporters for photosynthates and specialized metabolites in plants.Plant cell reports · 2026Review
- SWEET1-mediated glucose transport is crucial for energy availability in Arabidopsis.The New phytologist · 2026Article
- Genome-wide identification of SWEET gene family and functional analysis of BcSWEET1-2 associated with flowering in flowering Chinese cabbage (Brassica campestris).BMC genomics · 2025Article
- Identification of the SWEET gene family and functional characterization of PsSWEET1a and PsSWEET17b in the regulation of sugar accumulation in 'Fengtang' plum (Prunus salicina Lindl.).BMC plant biology · 2025Article
- The potato sugar transporter SWEET1g affects apoplasmic sugar ratio and phloem-mobile tuber- and flower-inducing signals.Plant physiology · 2024Article
- From acidity to sweetness: a comprehensive review of carbon accumulation in grape berries.Molecular horticulture · 2024Review
- Functional Characterization ofInternational journal of molecular sciences · 2024Article
- Physiological implications of SWEETs in plants and their potential applications in improving source-sink relationships for enhanced yield.Plant biotechnology journal · 2023Review
- Genome-Wide Identification, Expression, and Response toInternational journal of molecular sciences · 2023Article
- Fine mapping of reduced height locus RHT26 in common wheat.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2023Article
- Exploring the Substrate Specificity of a Sugar Transporter with Biosensors and Cheminformatics.ACS synthetic biology · 2023Article
- Article
- JULGI-mediated increment in phloem transport capacity relates to fruit yield in tomato.Plant biotechnology journal · 2022Article
- Hexose translocation mediated by SlSWEET5b is required for pollen maturation in Solanum lycopersicum.Plant physiology · 2022Article
- Hexose transporter SWEET5 confers galactose sensitivity to Arabidopsis pollen germination via a galactokinase.Plant physiology · 2022Article
- The adaptive evolution of Euryale ferox to the aquatic environment through paleo-hexaploidization.The Plant journal : for cell and molecular biology · 2022Article
- Article
- Identification, Analysis and Gene Cloning of the SWEET Gene Family Provide Insights into Sugar Transport in Pomegranate (International journal of molecular sciences · 2022Article
- Overexpression of the Potato Monosaccharide TransporterFrontiers in plant science · 2022Article
- Sugar signal mediates flavonoid biosynthesis in tea leaves.Horticulture research · 2022Article
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Authors and funding
6 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Sugar allocation from source to sink (young) leaves, critical for plant development, relies on activities of plasma membrane sugar transporters. However, the key sugar unloading mechanism to sink leaves remains elusive. SWEET transporters mediate sugar efflux into reproductive sinks; therefore, they are promising candidates for sugar unloading during leaf growth. Transcripts of SlSWEET1a, belonging to clade I of the SWEET family, were markedly more abundant than those of all other 30 SlSWEET genes in young leaves of tomatoes. High expression of SlSWEET1a was also detected in reproductive sinks, such as flowers. SlSWEET1a was dominantly expressed in leaf unloading veins, and the green fluorescent protein (GFP) fusion protein was localized to the plasma membrane using Arabidopsis protoplasts, further implicating this carrier in sugar unloading. In addition, yeast growth assays and radiotracer uptake analyses further demonstrated that SlSWEET1a acted as a low-affinity (Km ~100 mM) glucose-specific carrier with a passive diffusion manner. Finally, virus-induced gene silencing of SlSWEET1a expression reduced hexose accumulation to ~50% in young leaves, with a parallel 2-fold increase in mature leaves. Thus, we propose a novel function for SlSWEET1a in the uptake of glucose into unloading cells as part of the sugar unloading mechanism in sink leaves of tomato.
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