Explosive seed dispersal depends on SPL7 to ensure sufficient copper for localized lignin deposition via laccases

Pérez-Antón, Miguel; Schneider, Ilsa; Kroll, Patrizia; Hofhuis, Hugo; Metzger, Sabine; Pauly, Markus; Hay, Angela

doi:10.1073/pnas.2202287119

Cited by 15 publications

(12 citation statements)

References 40 publications

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“…In addition, Hay and colleagues found that the three laccases (LACs), LAC4, LAC11, and LAC17, are required for the polar deposition of lignin. The LAC4/11/17 are dependent on SQUAMOSA PROMOTER‐BINDING PROTEIN‐LIKE 7 (SPL7), which is a transcription factor involved in copper homeostasis (Pérez‐Antón et al ., 2022). This research highlights the importance of particular cell wall components for the process of seed dispersal.…”

Section: Figmentioning

confidence: 99%

FASEB: the mechanism of plant development

Alique,

Gómez‐Felipe,

Kuhn

et al. 2023

New Phytologist

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After having spent over 2 years mostly online due to the COVID-19 outbreak, the Mechanism of Plant Development Conference 2022 renewed our ability to meet and engage in-person with fantastic scientists from across the field of plant development. The first session was opened by Scott R Poethig (University of Pennsylvania, USA). Poethig described his 40 years of work on the shoot maturation of plants. He described how the juvenile to adult phase transition (also known as the vegetative phase change) in Arabidopsis is regulated by the levels of small microRNAs such as MIR156/MIR157 and their target SQUAMOSA PROMOTER-BINDING PROTEIN-LIKE (SPL) transcription factor. Moutasem Omary (The Hebrew University, Jerusalem, Israel) described the molecular basis of shoot-borne roots in tomato (Solanum lycopersicum) using CRISPR null mutants, single-cell transcriptomics, and phylogenetic analysis. Omary and colleagues found that the shoot-borne root initiation program is controlled by the subclass IIIB LATERAL ORGANS BOUNDARY DOMAIN (LBD), which is conserved within angiosperms (Omary et al., 2022). This research contributes to our understanding of the genetic regulation underlying different types of root systems. Moving from the underground to aboveground plant tissue, Angela Hay (Max Planck Institute, Cologne, Germany) talked about explosive seed dispersal in Cardamine hirsuta fruits. Hay explained how the asymmetric lignin deposition within endocarp cell walls of the fruit valves is required for seed dispersal. In addition, Hay and colleagues found that the three laccases (LACs), LAC4, LAC11, and LAC17, are required for the polar deposition of lignin. The LAC4/11/17 are dependent on SQUAMOSA PROMOTER-BINDING PROTEIN-LIKE 7 (SPL7), which is a transcription factor involved in copper homeostasis (P erez-Ant on et al., 2022). This research highlights the importance of particular cell wall components for the process of seed dispersal.During plant development, specification of cell types, biomechanical cell properties, and positional information are all essential for plant tissue morphogenesis (Fig. 1). Agata Burian (University of Silesia, Katowice, Poland) described her work on how leaf primordia acquire abaxial and adaxial specification to establish dorsiventrality. Burian and colleagues used time-lapse confocal imaging and molecular genetics to track both the expression patterns of ASYMMETRIC LEAVES and KANADI as well as the role of auxin during leaf specification. These findings suggest that auxin switches its role from coordinating the position to initiating

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Section: Figmentioning

confidence: 99%

FASEB: the mechanism of plant development

Alique,

Gómez‐Felipe,

Kuhn

et al. 2023

New Phytologist

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“…Another mutant from the screen described above ( Hofhuis and Hay, 2017 ) showed a reduction in endocarp b cell wall lignification and a consequent reduction in seed dispersal range. This phenotype is caused by the loss of SPL7 ( SQUAMOSA PROMOTER- BINDING PROTEIN-LIKE 7 ) gene function ( Pérez Antón et al, 2022 ). The SPL7 transcription factor is a conserved regulator of copper homeostasis and is required for copper to accumulate in the fruit of C. hirsuta .…”

Section: Lignin For Rapid Movements: Exploding Seed Podsmentioning

confidence: 99%

“…Laccases are copper-requiring enzymes and their activity depends on the SPL7 pathway to provide sufficient copper for lignification. Specifically, C. hirsuta LAC4, LAC11, and LAC17 proteins perfectly co-localize with lignin in the endocarp b cell wall and are required for lignification ( Pérez Antón et al, 2022 ). These are the same laccases that are required for xylem lignification in Arabidopsis ( Berthet et al, 2011 ; Zhao et al, 2013 ).…”

Section: Lignin For Rapid Movements: Exploding Seed Podsmentioning

confidence: 99%

Development and diversity of lignin patterns

Emonet

Hay

2022

Plant Physiology

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Different patterns of lignified cell walls are associated with diverse functions in a variety of plant tissues. These functions rely on the stiffness and hydrophobicity that lignin polymers impart to the cell wall. The precise pattern of subcellular lignin deposition is critical for the structure-function relationship in each lignified cell type. Here, we describe the role of xylem vessels as water pipes, Casparian strips as apoplastic barriers, and the role of asymmetrically lignified endocarp b cells in exploding seed pods. We highlight similarities and differences in the genetic mechanisms underpinning local lignin deposition in these diverse cell types. By bringing together examples from different developmental contexts and different plant species, we propose that comparative approaches can benefit our understanding of lignin patterning mechanisms.

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“…The ability of plants to disperse seeds away from the parent plant is another way plants move and colonize new habitats. It turns out that copper is involved in this ability to “move” in Cardamine hirsuta , also known as popping cress, an invasive weed species from the Brassicaceae family ( 2 ).…”

mentioning

confidence: 99%

“…In the follow-up work published in PNAS, the Hay group provide a genetic basis for this phenomenon that brings about the role of copper and laccases in this process ( 2 ). In a genetic screen for mutants with less-lignified fruit valves, the authors identified less lignin 1 ( lig1 ) that contained less lignin in end b cell walls compared with other lignified cell types in the fruit.…”

mentioning

confidence: 99%

Plant movement and LAC of it: How copper facilitates explosive seed dispersal

Vatamaniuk

2022

Proc. Natl. Acad. Sci. U.S.A.

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Explosive seed dispersal depends on SPL7 to ensure sufficient copper for localized lignin deposition via laccases

Cited by 15 publications

References 40 publications

FASEB: the mechanism of plant development

FASEB: the mechanism of plant development

Development and diversity of lignin patterns

Plant movement and LAC of it: How copper facilitates explosive seed dispersal

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