ArticlePlant molecular biology2016
Irregular xylem 7 (IRX7) is required for anchoring seed coat mucilage in Arabidopsis.
Article in Plant molecular biology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.
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18 citing papers in PubMed, 29 citations in OpenAlex.
- AhIRX7, a novel glycosyltransferases (GTs) gene, confers salt and drought tolerance in transgenic peanut.BMC plant biology · 2026Article
- MdDSK2a-Like-MdMTA Module Functions in Apple Cold Response via Regulating ROS Detoxification and Cell Wall Deposition.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2025Article
- Mucilicious methods: Navigating the tools developed to Arabidopsis Seed Coat Mucilage analysis.Cell surface (Amsterdam, Netherlands) · 2025Review
- Unveiling Key Genes and Unique Transcription Factors Involved in Secondary Cell Wall Formation inInternational journal of molecular sciences · 2024Article
- Identification of lncRNAs regulating seed traits in Brassica juncea and development of a comprehensive seed omics database.Functional & integrative genomics · 2024Article
- Article
- HOMEODOMAIN GLABROUS2 regulates cellulose biosynthesis in seed coat mucilage by activating CELLULOSE SYNTHASE5.Plant physiology · 2021Article
- The novel features of Plantago ovata seed mucilage accumulation, storage and release.Scientific reports · 2020Article
- Transcription Factors BLH2 and BLH4 Regulate Demethylesterification of Homogalacturonan in Seed Mucilage.Plant physiology · 2020Article
- A small-scale fractionation pipeline for rapid analysis of seed mucilage characteristics.Plant methods · 2020Article
- Tubby-like Protein 2 regulates homogalacturonan biosynthesis in Arabidopsis seed coat mucilage.Plant molecular biology · 2019Article
- TRM4 is essential for cellulose deposition in Arabidopsis seed mucilage by maintaining cortical microtubule organization and interacting with CESA3.The New phytologist · 2019Article
- Cytological Approaches Combined With Chemical Analysis Reveals the Layered Nature of Flax Mucilage.Frontiers in plant science · 2019Article
- Xylan in the Middle: Understanding Xylan Biosynthesis and Its Metabolic Dependencies Toward Improving Wood Fiber for Industrial Processing.Frontiers in plant science · 2019Review
- Identification of Key Enzymes for Pectin Synthesis in Seed Mucilage.Plant physiology · 2018Article
- Role for ArabidopsisFrontiers in plant science · 2018Article
- Identification and Characterization of Arabidopsis Seed Coat Mucilage Proteins.Plant physiology · 2017Article
- Dissecting Seed Mucilage Adherence Mediated by FEI2 and SOS5.Frontiers in plant science · 2016Article
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Authors and funding
9 authors at 3 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Large quantities of mucilage are synthesized in seed coat epidermis cells during seed coat differentiation. This process is an ideal model system for the study of plant cell wall biosynthesis and modifications. In this study, we show that mutation in Irregular Xylem 7 (IRX7) results in a defect in mucilage adherence due to reduced xylan biosynthesis. IRX7 was expressed in the seeds from 4 days post-anthesis (DPA) to 13 DPA, with the peak of expression at 13 DPA. The seed coat epidermis cells of irx7 displayed no aberrant morphology during differentiation, and these cells synthesized and deposited the same amount of mucilage as did wild type (WT) cells. However, the distribution of the water-soluble vs. adherent mucilage layers was significantly altered in irx7 compared to the WT. Both the amount of xylose and the extent of glycosyl linkages of xylan was dramatically decreased in irx7 water-soluble and adherent mucilage compared to the WT. The polymeric structure of water-soluble mucilage was altered in irx7, with a total loss of the higher molecular weight polymer components present in the WT. Correspondingly, whole-seed immunolabeling assays and dot-immunoassays of extracted mucilage indicated dramatic changes in rhamnogalacturonan I (RG I) and xylan epitopes in irx7 mucilage. Furthermore, the crystalline cellulose content was significantly reduced in irx7 mucilage. Taken together, these results indicate that xylan synthesized by IRX7 plays an essential role in maintaining the adhesive property of seed coat mucilage, and its structural role is potentially implemented through its interaction with cellulose.
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