ArticlePlant physiology1998
Characterization of source- and sink-specific sucrose/H+ symporters from carrot.
Article in Plant physiology, 1998. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.
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Who cites it
21 citing papers in PubMed, 84 citations in OpenAlex.
- Plant SUT Sucrose Transporters: Structure, Evolution and Biological Functions.Current protein & peptide science · 2026Review
- Molecular characterization of SUT Gene Family in Solanaceae with emphasis on expression analysis of pepper genes during development and stresses.Bioengineered · 2022Article
- Local endocytosis of sucrose transporter 2 in duckweed reveals the role of sucrose transporter 2 in guard cells.Frontiers in plant science · 2022Article
- Hetero/Homo-Complexes of Sucrose Transporters May Be a Subtle Mode to Regulate Sucrose Transportation in Grape Berries.International journal of molecular sciences · 2021Article
- The sucrose transporter MdSUT4.1 participates in the regulation of fruit sugar accumulation in apple.BMC plant biology · 2020Article
- Characterization of a vacuolar sucrose transporter, HbSUT5, from Hevea brasiliensis: involvement in latex production through regulation of intracellular sucrose transport in the bark and laticifers.BMC plant biology · 2019Article
- Lateral Transport of Organic and Inorganic Solutes.Plants (Basel, Switzerland) · 2019Review
- Sucrose Transporter Localization and Function in Phloem Unloading in Developing Stems.Plant physiology · 2017Article
- Divergent Evolutionary Pattern of Sugar Transporter Genes is Associated with the Difference in Sugar Accumulation between Grasses and Eudicots.Scientific reports · 2016Article
- Characterization, localization, and seasonal changes of the sucrose transporter FeSUT1 in the phloem of Fraxinus excelsior.Journal of experimental botany · 2015Article
- Evolution of plant sucrose uptake transporters.Frontiers in plant science · 2012Article
- Immunolocalization of solanaceous SUT1 proteins in companion cells and xylem parenchyma: new perspectives for phloem loading and transport.Plant physiology · 2008Article
- Pathways of glucose regulation of monosaccharide transport in grape cells.Plant physiology · 2006Article
- Article
- Magnesium deficiency in sugar beets alters sugar partitioning and phloem loading in young mature leaves.Planta · 2005Article
- Sucrose transport into plasma membrane vesicles from tobacco leaves by H+ symport or counter exchange does not display a linear component.The Journal of membrane biology · 2004Article
- Sucrose regulates elongation of carrot somatic embryo radicles as a signal molecule.Plant molecular biology · 2004Article
- Cloning, expression, and characterization of sorbitol transporters from developing sour cherry fruit and leaf sink tissues.Plant physiology · 2003Article
- A new subfamily of sucrose transporters, SUT4, with low affinity/high capacity localized in enucleate sieve elements of plants.The Plant cell · 2000Article
- The sucrose transporter of celery. Identification and expression during salt stress.Plant physiology · 2000Article
Corrections and comments
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Authors and funding
2 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
To understand how sucrose (Suc) is transported from source leaves to developing tap roots of carrot (Daucus carota L.), we cloned two cDNAs (DcSUT1 and DcSUT2) for proteins with homologies to plant Suc/H+ symporters. The deduced polypeptide sequences are 52% identical and have 12 predicted membrane-spanning domains each. Transport activities were confirmed by expression of the clones in yeast cells. Both transporters had optimal activity below pH 5.0 and Michaelis constant values of 0.5 mM. Suc uptake was inhibited by protonophores, suggesting that Suc transport is linked to the proton electrochemical potential across the plasma membrane. DcSUT1 and DcSUT2 had markedly different expression patterns. Transcripts of DcSUT1 were found only in the green parts of plants, with highest levels in the lamina of source leaves, indicating that DcSUT1 is required for the loading of Suc into the phloem. In leaf lamina expression was diurnally regulated, suggesting that Suc export from the leaves is higher during the day than during the night. The mRNA of DcSUT2 was found mainly in sink organs, and no diurnal expression pattern was detected in the storage root. Here, expression was not restricted to the phloem but was much higher in storage parenchyma tissues of phloem and xylem. The close relationship of DcSUT2 with a Suc/H+ symporter from fava bean, which facilitates Suc uptake into the cotyledons of developing seeds, indicates that this carrot Suc transporter may be involved in loading Suc into storage parenchyma cells.
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