ArticlePlant physiology2009
Tie-dyed1 encodes a novel, phloem-expressed transmembrane protein that functions in carbohydrate partitioning.
Article in Plant physiology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers.
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Who cites it
26 citing papers in PubMed, 61 citations in OpenAlex.
- Spatial transcriptomics identifies distinct domains regulating yield-component traits of the wheat ear.Science advances · 2026Article
- Systems analysis of long-term heat stress responses in the C4 grass Setaria viridis.The Plant cell · 2025Article
- Plant Productivity and Leaf Starch During Grain Fill Is Linked to QTL Containing Flowering Locus T1 (Plants (Basel, Switzerland) · 2025Article
- Sugar loading is not required for phloem sap flow in maize plants.Nature plants · 2022Article
- Maize Brittle Stalk2-Like3, encoding a COBRA protein, functions in cell wall formation and carbohydrate partitioning.The Plant cell · 2021Article
- The Dominant and Poorly Penetrant Phenotypes of MaizeThe Plant cell · 2018Article
- Maize Carbohydrate partitioning defective1 impacts carbohydrate distribution, callose accumulation, and phloem function.Journal of experimental botany · 2018Article
- Genome-wide analysis of the invertase gene family from maize.Plant molecular biology · 2018Article
- Sucrose Transporter ZmSut1 Expression and Localization Uncover New Insights into Sucrose Phloem Loading.Plant physiology · 2016Article
- Metabolite transport and associated sugar signalling systems underpinning source/sink interactions.Biochimica et biophysica acta · 2016Review
- HyPRP1 Gene Suppressed by Multiple Stresses Plays a Negative Role in Abiotic Stress Tolerance in Tomato.Frontiers in plant science · 2016Article
- Tonoplast Sugar Transporters (SbTSTs) putatively control sucrose accumulation in sweet sorghum stems.Plant signaling & behavior · 2016Article
- Sucrose accumulation in sweet sorghum stems occurs by apoplasmic phloem unloading and does not involve differential Sucrose transporter expression.BMC plant biology · 2015Article
- The tie-dyed pathway promotes symplastic trafficking in the phloem.Plant signaling & behavior · 2013Article
- Increased expression of a phloem membrane protein encoded by NHL26 alters phloem export and sugar partitioning in Arabidopsis.The Plant cell · 2013Article
- Regulation of leaf maturation by chromatin-mediated modulation of cytokinin responses.Developmental cell · 2013Article
- Tie-dyed2 encodes a callose synthase that functions in vein development and affects symplastic trafficking within the phloem of maize leaves.Plant physiology · 2012Article
- Transcript and metabolite signature of maize source leaves suggests a link between transitory starch to sucrose balance and the autonomous floral transition.Journal of experimental botany · 2012Article
- LATE MERISTEM IDENTITY2 acts together with LEAFY to activate APETALA1.Development (Cambridge, England) · 2011Article
- Amino acid export in plants: a missing link in nitrogen cycling.Molecular plant · 2011Review
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Authors and funding
4 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Carbon is partitioned between export from the leaf and retention within the leaf, and this process is essential for all aspects of plant growth and development. In most plants, sucrose is loaded into the phloem of carbon-exporting leaves (sources), transported through the veins, and unloaded into carbon-importing tissues (sinks). We have taken a genetic approach to identify genes regulating carbon partitioning in maize (Zea mays). We identified a collection of mutants, called the tie-dyed (tdy) loci, that hyperaccumulate carbohydrates in regions of their leaves. To understand the molecular function of Tdy1, we cloned the gene. Tdy1 encodes a novel transmembrane protein present only in grasses, although two protein domains are conserved across angiosperms. We found that Tdy1 is expressed exclusively in phloem cells of both source and sink tissues, suggesting that Tdy1 may play a role in phloem loading and unloading processes. In addition, Tdy1 RNA accumulates in protophloem cells upon differentiation, suggesting that Tdy1 may function as soon as phloem cells become competent to transport assimilates. Monitoring the movement of a fluorescent, soluble dye showed that tdy1 leaves have retarded phloem loading. However, once the dye entered into the phloem, solute transport appeared equal in wild-type and tdy1 mutant plants, suggesting that tdy1 plants are not defective in phloem unloading. Therefore, even though Tdy1 RNA accumulates in source and sink tissues, we propose that TDY1 functions in carbon partitioning by promoting phloem loading. Possible roles for TDY1 are discussed.
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