ArticleProceedings of the National Academy of Sciences of the United States of America2022
Explosive seed dispersal depends on SPL7 to ensure sufficient copper for localized lignin deposition via laccases.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
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14 citing papers in PubMed, 36 citations in OpenAlex.
- Copper-sensitive OsSPL9 TF regulates expression of indica rice domestication-associated miRNAs and phenotypes.Communications biology · 2026Article
- CESA7 and microtubules pattern complex secondary cell walls in explosive fruit of Cardamine hirsuta.The Plant cell · 2026Article
- Memory in the wall: expanding our understanding of the roles of plant cell walls.The New phytologist · 2026Review
- Physiological roles of lignins - tuning cell wall hygroscopy and biomechanics.The New phytologist · 2025Review
- Transcriptional regulation of thorn tip sclerification in plants.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
- Increased temperature enhances microbial-mediated lignin decomposition in river sediment.Microbiome · 2025Article
- Modulation of morphogenesis and metabolism by plant cell biomechanics: from model plants to traditional herbs.Horticulture research · 2025Article
- The Shock of Shatter: Understanding Silique and Silicle Dehiscence for Improving Oilseed Crops in Brassicaceae.Plant direct · 2025Review
- CUC/auxin patterning of decanalised petal number inQuantitative plant biology · 2025Article
- Paralogous Gene Recruitment in Multiple Families Constitutes Genetic Architecture and Robustness of Pod Dehiscence in Legumes.Genome biology and evolution · 2024Article
- The trichome pattern diversity of Cardamine shares genetic mechanisms with Arabidopsis but differs in environmental drivers.Plant physiology · 2024Article
- Loss of OPT3 function decreases phloem copper levels and impairs crosstalk between copper and iron homeostasis and shoot-to-root signaling in Arabidopsis thaliana.The Plant cell · 2023Article
- Development and diversity of lignin patterns.Plant physiology · 2022Article
- Plant movement and LAC of it: How copper facilitates explosive seed dispersal.Proceedings of the National Academy of Sciences of the United States of America · 2022Article
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Authors and funding
7 authors at 3 institutions in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
Exploding seed pods evolved in the Arabidopsis relative Cardamine hirsuta via morphomechanical innovations that allow the storage and rapid release of elastic energy. Asymmetric lignin deposition within endocarpb cell walls is one such innovation that is required for explosive seed dispersal and evolved in association with the trait. However, the genetic control of this novel lignin pattern is unknown. Here, we identify three lignin-polymerizing laccases, LAC4, 11, and 17, that precisely colocalize with, and are redundantly required for, asymmetric lignification of endocarpb cells. By screening for C. hirsuta mutants with less lignified fruit valves, we found that loss of function of the transcription factor gene SQUAMOSA PROMOTER-BINDING PROTEIN-LIKE 7 (SPL7) caused a reduction in endocarpb cell-wall lignification and a consequent reduction in seed dispersal range. SPL7 is a conserved regulator of copper homeostasis and is both necessary and sufficient for copper to accumulate in the fruit. Laccases are copper-requiring enzymes. We discovered that laccase activity in endocarpb cell walls depends on the SPL7 pathway to acclimate to copper deficiency and provide sufficient copper for lignin polymerization. Hence, SPL7 links mineral nutrition to efficient dispersal of the next generation.
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