ArticlePlant physiology2011
The transcriptional regulator LEUNIG_HOMOLOG regulates mucilage release from the Arabidopsis testa.
Article in Plant physiology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 39 papers.
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Who cites it
39 citing papers in PubMed, 59 citations in OpenAlex.
- 800 million years of co-evolution in the green plant lineage: the case of LEUNIG and SEUSS transcriptional co-regulators.Molecular biology and evolution · 2026Article
- Rewiring of LEUNIG_HOMOLOG interaction networks marks regulatory shifts from meristem to organ growth in Arabidopsis flowers.The Plant journal : for cell and molecular biology · 2025Article
- Disruption of theInternational journal of molecular sciences · 2024Article
- Degeneration of oil bodies by rough endoplasmic reticulum -associated protein during seed germination inAoB PLANTS · 2023Article
- MYB-bHLH-TTG1 in a Multi-tiered Pathway Regulates Arabidopsis Seed Coat Mucilage Biosynthesis Genes Including PECTIN METHYLESTERASE INHIBITOR14 Required for Homogalacturonan Demethylesterification.Plant & cell physiology · 2023Article
- The Genetic Control of SEEDSTICK and LEUNIG-HOMOLOG in Seed and Fruit Development: New Insights into Cell Wall Control.Plants (Basel, Switzerland) · 2022Article
- The evolving views of the simplest pectic polysaccharides: homogalacturonan.Plant cell reports · 2022Review
- ERF4 and MYB52 transcription factors play antagonistic roles in regulating homogalacturonan de-methylesterification in Arabidopsis seed coat mucilage.The Plant cell · 2021Article
- Transport of UDP-rhamnose by URGT2, URGT4, and URGT6 modulates rhamnogalacturonan-I length.Plant physiology · 2021Article
- The novel features of Plantago ovata seed mucilage accumulation, storage and release.Scientific reports · 2020Article
- LEUNIG_HOMOLOG Mediates MYC2-Dependent Transcriptional Activation in Cooperation with the Coactivators HAC1 and MED25.The Plant cell · 2019Article
- Tubby-like Protein 2 regulates homogalacturonan biosynthesis in Arabidopsis seed coat mucilage.Plant molecular biology · 2019Article
- Cytological Approaches Combined With Chemical Analysis Reveals the Layered Nature of Flax Mucilage.Frontiers in plant science · 2019Article
- Article
- MuSeeQ, a novel supervised image analysis tool for the simultaneous phenotyping of the soluble mucilage and seed morphometric parameters.Plant methods · 2018Article
- Effective extraction of Arabidopsis adherent seed mucilage by ultrasonic treatment.Scientific reports · 2017Article
- Irregular xylem 7 (IRX7) is required for anchoring seed coat mucilage in Arabidopsis.Plant molecular biology · 2016Article
- Xylans Provide the Structural Driving Force for Mucilage Adhesion to the Arabidopsis Seed Coat.Plant physiology · 2016Article
- Xylan synthesized by Irregular Xylem 14 (IRX14) maintains the structure of seed coat mucilage in Arabidopsis.Journal of experimental botany · 2016Article
- Highly Branched Xylan Made by IRREGULAR XYLEM14 and MUCILAGE-RELATED21 Links Mucilage to Arabidopsis Seeds.Plant physiology · 2015Article
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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
Exposure of the mature Arabidopsis (Arabidopsis thaliana) seed to water results in the rapid release of pectinaceous mucilage from the outer cells of the testa. Once released, mucilage completely envelops the seed in a gel-like capsule. The physical force required to rupture the outer cell wall of the testa comes from the swelling of the mucilage as it expands rapidly following hydration. In this study, we show that mutations in the transcriptional regulator LEUNIG_HOMOLOG (LUH) cause a mucilage extrusion defect due to altered mucilage swelling. Based on sugar linkage and immunomicroscopic analyses, we show that the structure of luh mucilage is altered, having both an increase in substituted rhamnogalacturonan I and in methyl-esterified homogalacturonan. Also correlated with the structural modification of luh mucilage is a significant decrease in MUCILAGE MODIFIED2 (MUM2; a β-galactosidase) expression in the luh seed coat, raising the possibility that reduced activity of this glycosidase is directly responsible for the luh mucilage defects. Consistent with this is the structural similarity between mum2 and luh mucilage as well as the observation that elevating MUM2 expression in luh mutants completely suppresses the mucilage extrusion defect. Suppression of the luh mutant phenotype was also observed when LEUNIG, a transcriptional corepressor closely related to LUH, was introduced in luh mutants under the control of the LUH promoter. Based on these data, we propose a new model for the regulation of pectin biosynthesis during plant growth and development.
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