ArticlePlant physiology2007
Arabidopsis sucrose transporter AtSUC9. High-affinity transport activity, intragenic control of expression, and early flowering mutant phenotype.
Article in Plant physiology, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 86 papers.
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Who cites it
86 citing papers in PubMed, 171 citations in OpenAlex.
- Dodder seedlings benefit from apoplastic nutrition by inducing SWEET15-mediated unloading of sucrose from the host's phloem.The New phytologist · 2026Article
- Ribozyme-Enabled Tissue Specificity (RETS): A System for Precise Gene Expression without Specialized Promoters.ACS synthetic biology · 2026Article
- Measuring Esculin Export from Leaves as Proxy for Sucrose Loading Rates in the Phloem.Methods in molecular biology (Clifton, N.J.) · 2026Article
- Plant SUT Sucrose Transporters: Structure, Evolution and Biological Functions.Current protein & peptide science · 2026Review
- Elucidating design principles for Ribozyme-Enabled Tissue Specificity (RETS) to allow precise expression without specialized promoters.bioRxiv : the preprint server for biology · 2025Article
- Transcriptome and Metabolome Analyses Offer New Insights into Bolting Time Regulation in Broccoli.International journal of molecular sciences · 2025Article
- Sugar Transport and Signaling in Shoot Branching.International journal of molecular sciences · 2024Review
- Fast and simple fluorometric measurement of phloem loading exposes auxin-dependent regulation of Arabidopsis sucrose transporter AtSUC2.The Plant journal : for cell and molecular biology · 2024Article
- The role of sugar transporters in the battle for carbon between plants and pathogens.Plant biotechnology journal · 2024Review
- Functional Characterization of JcSWEET12 and JcSWEET17a from Physic Nut.International journal of molecular sciences · 2024Article
- From acidity to sweetness: a comprehensive review of carbon accumulation in grape berries.Molecular horticulture · 2024Review
- Article
- SUC1's mode of low-affinity transport.Nature plants · 2023Article
- Expression of the wheat multipathogen resistance hexose transporter Lr67res is associated with anion fluxes.Plant physiology · 2023Article
- How pollen tubes fight for food: the impact of sucrose carriers and invertases ofFrontiers in plant science · 2023Article
- Comparative Analysis on the Evolution of Flowering Genes in Sugar Pathway in Brassicaceae.Genes · 2022Article
- Molecular characterization of SUT Gene Family in Solanaceae with emphasis on expression analysis of pepper genes during development and stresses.Bioengineered · 2022Article
- An overview of sucrose transporter (SUT) genes family in rice.Molecular biology reports · 2022Article
- Carbon fluxes and environmental interactions during legume development, with a specific focus on Pisum sativum.Physiologia plantarum · 2022Review
- Identification and expression analysis of pineapple sugar transporters reveal their role in the development and environmental response.Frontiers in plant science · 2022Article
26 more citing papers are in PubMed but not listed here.
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Authors and funding
7 authors at 3 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
AtSUC9 (At5g06170), a sucrose (Suc) transporter from Arabidopsis (Arabidopsis thaliana) L. Heynh., was expressed in Xenopus (Xenopus laevis) oocytes, and transport activity was analyzed. Compared to all other Suc transporters, AtSUC9 had an ultrahigh affinity for Suc (K(0.5) = 0.066 +/- 0.025 mm). AtSUC9 showed low substrate specificity, similar to AtSUC2 (At1g22710), and transported a wide range of glucosides, including helicin, salicin, arbutin, maltose, fraxin, esculin, turanose, and alpha-methyl-d-glucose. The ability of AtSUC9 to transport 10 glucosides was compared directly with that of AtSUC2, HvSUT1 (from barley [Hordeum vulgare]), and ShSUT1 (from sugarcane [Saccharum hybrid]), and results indicate that type I and type II Suc transporters have different substrate specificities. AtSUC9 protein was localized to the plasma membrane by transient expression in onion (Allium cepa) epidermis. Using a whole-gene translational fusion to beta-glucuronidase, AtSUC9 expression was found in sink tissues throughout the shoots and in flowers. AtSUC9 expression in Arabidopsis was dependent on intragenic sequence, and this was found to also be true for AtSUC1 (At1g71880) but not AtSUC2. Plants containing mutations in Suc transporter gene AtSUC9 were found to have an early flowering phenotype under short-day conditions. The transport properties of AtSUC9 indicate that it is uniquely suited to provide cellular uptake of Suc at very low extracellular Suc concentrations. The mutant phenotype of atsuc9 alleles indicates that AtSUC9 activity leads to a delay in floral transition.
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