ArticlePlanta2008
Conserved cis-regulatory elements for DNA-binding-with-one-finger and homeo-domain-leucine-zipper transcription factors regulate companion cell-specific expression of the Arabidopsis thaliana SUCROSE TRANSPORTER 2 gene.
Article in Planta, 2008. 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, 43 citations in OpenAlex.
- Regulatory DNA Sequences Controlling Gene Expression in Leaf Phloem Cells.Methods in molecular biology (Clifton, N.J.) · 2026Review
- Synchronizing sucrose effluxers with influxers in phloem loading for yield output and adaptation to environment.National science review · 2025Article
- Current perspectives on the regulatory mechanisms of sucrose accumulation in sugarcane.Heliyon · 2024Review
- How pollen tubes fight for food: the impact of sucrose carriers and invertases ofFrontiers in plant science · 2023Article
- RabA2b Overexpression Alters the Plasma-Membrane Proteome and Improves Drought Tolerance in Arabidopsis.Frontiers in plant science · 2021Article
- Genome-wide Characterization and Expression Analysis of Sugar Transporter Family Genes in Woodland Strawberry.The plant genome · 2018Article
- The Sugar-Signaling Hub: Overview of Regulators and Interaction with the Hormonal and Metabolic Network.International journal of molecular sciences · 2018Review
- Strength, Stability, and cis-Motifs of In silico Identified Phloem-Specific Promoters in Brassica juncea (L.).Frontiers in plant science · 2016Article
- Transcriptional repression caused by Dof5.8 is involved in proper vein network formation in Arabidopsis thaliana leaves.Journal of plant research · 2015Article
- Arabidopsis type I proton-pumping pyrophosphatase expresses strongly in phloem, where it is required for pyrophosphate metabolism and photosynthate partitioning.Plant physiology · 2015Article
- Cloning and functional characterization of the promoter of PsSEOF1 gene from Pisum sativum under different stress conditions using Agrobacterium-mediated transient assay.Plant signaling & behavior · 2014Article
- LuFLA1PRO and LuBGAL1PRO promote gene expression in the phloem fibres of flax (Linum usitatissimum).Plant cell reports · 2013Article
- Phloem development in nematode-induced feeding sites: the implications of auxin and cytokinin.Frontiers in plant science · 2013Article
- Vascular gene expression: a hypothesis.Frontiers in plant science · 2013Article
- Article
- The plant-specific dof transcription factors family: new players involved in vascular system development and functioning in Arabidopsis.Frontiers in plant science · 2013Article
- The Arabidopsis CORI3 promoter contains two cis-acting regulatory regions required for transcriptional activity in companion cells.Plant cell reports · 2011Article
- Potassium (K+) gradients serve as a mobile energy source in plant vascular tissues.Proceedings of the National Academy of Sciences of the United States of America · 2011Article
- The Vitis vinifera sugar transporter gene family: phylogenetic overview and macroarray expression profiling.BMC plant biology · 2010Article
- An ABA-responsive element in the AtSUC1 promoter is involved in the regulation of AtSUC1 expression.Planta · 2010Article
Corrections and comments
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Authors and funding
3 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The transition from young carbon-importing sink leaves of higher plants to mature carbon-exporting source leaves is paralleled by a complete reversal of phloem function. While sink-leaf phloem mediates the influx of reduced carbon from older source leaves and the release of this imported carbon to the sink-leaf mesophyll, source-leaf phloem catalyzes the uptake of photoassimilates into companion cells (CCs) and sieve elements (SEs) and the net carbon export from the leaf. Phloem loading in source leaves with sucrose, the main or exclusive transport form for fixed carbon in most higher plants, is catalyzed by plasma membrane-localized sucrose transporters. Consistent with the described physiological switch from sink to source, the promoter of the Arabidopsis AtSUC2 gene is active only in source-leaf CCs of Arabidopsis or of transgenic tobacco (Nicotiana tabacum). For the identification of regulatory elements involved in this companion cell-specific and source-specific gene expression, we performed detailed analyses of the AtSUC2 promoter by truncation and mutagenesis. A 126-bp promoter fragment was identified, which seems to contain these fragments and which drives AtSUC2-typical expression when combined with a 35S minimal promoter. Within this fragment, linker-scanning analyses revealed two cis-regulatory elements that were further characterized as putative binding sites for transcription factors of the DNA-binding-with-one-finger or the homeo-domain-leucine-zipper families. Similar or identical binding sites are found in other genes and in different plant species, suggesting an ancient regulatory mechanism for this important physiological switch.
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