ArticleJournal of experimental botany2016
α-Xylosidase plays essential roles in xyloglucan remodelling, maintenance of cell wall integrity, and seed germination in Arabidopsis thaliana.
Article in Journal of experimental botany, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers.
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33 citing papers in PubMed, 62 citations in OpenAlex.
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- TCP3-mediated regulation of cell expansion in Arabidopsis thaliana.The New phytologist · 2025Article
- Transcription factor ERF1 promotes seed germination by repressing jasmonic acid (JA) signaling pathway.Plant cell reports · 2025Article
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- Analysis of xyloglucan metabolism mutants highlights the prominent role of xylose cleavage in seed dormancy.The Plant journal : for cell and molecular biology · 2025Article
- Dynamic proteomics reveals that endosperm weakening plays a critical role during seed germination inFrontiers in plant science · 2025Article
- Comparative Proteomic Analysis of Wild and Cultivated Amaranth Species Seeds by 2-DE and ESI-MS/MS.Plants (Basel, Switzerland) · 2024Article
- The MKK3 MAPK cascade integrates temperature and after-ripening signals to modulate seed germination.Proceedings of the National Academy of Sciences of the United States of America · 2024Article
- The dimorphic diaspore model Aethionema arabicum (Brassicaceae): Distinct molecular and morphological control of responses to parental and germination temperatures.The Plant cell · 2024Article
- Autophagy maintains endosperm quality during seed storage to preserve germination ability in Arabidopsis.Proceedings of the National Academy of Sciences of the United States of America · 2024Article
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- Isolation and Characterization of Extracellular Vesicles fromPlants (Basel, Switzerland) · 2023Article
- Modulation of wheat grain dormancy by introducing the recombinant abscisic acid-stimulated abscisic acid biosynthesis gene.Plant biotechnology (Tokyo, Japan) · 2023Article
- Secretome analysis revealed that cell wall remodeling and starch catabolism underlie the early stages of somatic embryogenesis inFrontiers in plant science · 2023Article
- Review
- The Genetic Control of SEEDSTICK and LEUNIG-HOMOLOG in Seed and Fruit Development: New Insights into Cell Wall Control.Plants (Basel, Switzerland) · 2022Article
- Agrobacterium-mediated cassava transformation for the Asian elite variety KU50.Plant molecular biology · 2022Article
- Cold-induced secondary dormancy and its regulatory mechanisms in Beta vulgaris.Plant, cell & environment · 2022Article
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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
Regulation and maintenance of cell wall physical properties are crucial for plant growth and environmental response. In the germination process, hypocotyl cell expansion and endosperm weakening are prerequisites for dicot seeds to complete germination. We have identified the Arabidopsis mutant thermoinhibition-resistant germination 1 (trg1), which has reduced seed dormancy and insensitivity to unfavourable conditions for germination owing to a loss-of-function mutation of TRG1/XYL1, which encodes an α-xylosidase. Compared to those of wild type, the elongating stem of trg1 showed significantly lower viscoelasticity, and the fruit epidermal cells were longitudinally shorter and horizontally enlarged. Actively growing tissues of trg1 over-accumulated free xyloglucan oligosaccharides (XGOs), and the seed cell wall had xyloglucan with a greatly reduced molecular weight. These observations suggest that XGOs reduce xyloglucan size by serving as an acceptor in transglycosylation and eventually enhancing cell wall loosening. TRG1/XYL1 gene expression was abundant in growing wild-type organs and tissues but relatively low in cells at most actively elongating part of the tissues, suggesting that α-xylosidase contributes to maintaining the mechanical integrity of the primary cell wall in the growing and pre-growing tissues. In germinating seeds of trg1, expression of genes encoding specific abscisic acid and gibberellin metabolism enzymes was altered in accordance with the aberrant germination phenotype. Thus, cell wall integrity could affect seed germination not only directly through the physical properties of the cell wall but also indirectly through the regulation of hormone gene expression.
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