ArticleFrontiers in plant science2013
P-proteins in Arabidopsis are heteromeric structures involved in rapid sieve tube sealing.
Article in Frontiers in plant science, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.
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20 citing papers in PubMed, 48 citations in OpenAlex.
- A Dual-Reporter System for the Analysis of Phloem Structural and Signaling Responses In Vivo.Methods in molecular biology (Clifton, N.J.) · 2026Article
- Viral Systemic Movement Is Enhanced by Alteration of a Structural Phloem Protein by the Insect Vector.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2025Article
- SEOR2 in Arabidopsis mediates CaScientific reports · 2025Article
- Transformation of flg22 perception into electrical signals decoded in vasculature leads to sieve tube blockage and pathogen resistance.Science advances · 2025Article
- The interaction networks of small rubber particle proteins in the latex ofFrontiers in plant science · 2024Article
- Identification of Diverse Stress-Responsive Xylem Sap Peptides in Soybean.International journal of molecular sciences · 2022Article
- Pre-symptomatic modified phytohormone profile is associated with lower phytoplasma titres in an Arabidopsis seor1ko line.Scientific reports · 2020Article
- Sieve element occlusion provides resistance against Aphis gossypii in TGR-1551 melons.Insect science · 2020Article
- Plant MicroRNAs in Cross-Kingdom Regulation of Gene Expression.International journal of molecular sciences · 2018Review
- Article
- What Slows Down Phytoplasma Proliferation? Speculations on the Involvement of AtSEOR2 Protein in Plant Defence Signalling.Plant signaling & behavior · 2018Article
- Filamentous sieve element proteins are able to limit phloem mass flow, but not phytoplasma spread.Journal of experimental botany · 2017Article
- Functional Evaluation of Proteins in Watery and Gel Saliva of Aphids.Frontiers in plant science · 2016Review
- Dynamics of long-distance signaling via plant vascular tissues.Frontiers in plant science · 2015Review
- Article
- Characterization of five subgroups of the sieve element occlusion gene family in Glycine max reveals genes encoding non-forisome P-proteins, forisomes and forisome tails.Plant molecular biology · 2014Article
- Molecular and ultrastructural analysis of forisome subunits reveals the principles of forisome assembly.Annals of botany · 2014Article
- Uncertain role of MtSEO-F3 in assembly of Medicago truncatula forisomes.Plant signaling & behavior · 2014Article
- Calcium powered phloem protein of SEO gene family "Forisome" functions in wound sealing and act as biomimetic smart materials.Plant signaling & behavior · 2014Review
- Phloem: the integrative avenue for resource distribution, signaling, and defense.Frontiers in plant science · 2013Article
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Authors and funding
7 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Structural phloem proteins (P-proteins) are characteristic components of the sieve elements in all dicotyledonous and many monocotyledonous angiosperms. Tobacco P-proteins were recently confirmed to be encoded by the widespread sieve element occlusion (SEO) gene family, and tobacco SEO proteins were shown to be directly involved in sieve tube sealing thus preventing the loss of photosynthate. Analysis of the two Arabidopsis SEO proteins (AtSEOa and AtSEOb) indicated that the corresponding P-protein subunits do not act in a redundant manner. However, there are still pending questions regarding the interaction properties and specific functions of AtSEOa and AtSEOb as well as the general function of structural P-proteins in Arabidopsis. In this study, we characterized the Arabidopsis P-proteins in more detail. We used in planta bimolecular fluorescence complementation assays to confirm the predicted heteromeric interactions between AtSEOa and AtSEOb. Arabidopsis mutants depleted for one or both AtSEO proteins lacked the typical P-protein structures normally found in sieve elements, underlining the identity of AtSEO proteins as P-proteins and furthermore providing the means to determine the role of Arabidopsis P-proteins in sieve tube sealing. We therefore developed an assay based on phloem exudation. Mutants with reduced AtSEO expression levels lost twice as much photosynthate following injury as comparable wild-type plants, confirming that Arabidopsis P-proteins are indeed involved in sieve tube sealing.
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