ArticleThe Plant cell2015
Arabidopsis RIC1 Severs Actin Filaments at the Apex to Regulate Pollen Tube Growth.
Article in The Plant cell, 2015. 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, 84 citations in OpenAlex.
- The class VIII myosin ATM2 stabilizes actin-plasma membrane contacts in tobacco pollen tubes by locally promoting PtdIns(4,5)PNature plants · 2026Article
- Cytoskeletal control of development and environmental adaptation in plants.Science China. Life sciences · 2026Review
- NtLLG4-mediated unconventional polar exocytosis of NtPPME1 coordinates cell wall rigidity and membrane dynamics to control pollen tube integrity.Science advances · 2025Article
- Barley resistance and susceptibility to fungal cell entry involve the interplay of ROP signaling with phosphatidylinositol-monophosphates.The Plant journal : for cell and molecular biology · 2025Article
- Polarized subcellular activation of Rho proteins by specific ROPGEFs drives pollen germination in Arabidopsis thaliana.PLoS biology · 2025Article
- Establishing cell polarity in plants: the role of cytoskeletal structures and regulatory pathways.Frontiers in cell and developmental biology · 2025Review
- Polar localization and local translation of RHO-RELATED PROTEIN FROM PLANTS2 mRNAs promote root hair growth in Arabidopsis.The Plant cell · 2024Article
- Species divergence and environmental adaptation ofEcology and evolution · 2024Article
- Two subtypes of GTPase-activating proteins coordinate tip growth and cell size regulation in Physcomitrium patens.Nature communications · 2023Article
- Barley RIC157, a potential RACB scaffold protein, is involved in susceptibility to powdery mildew.Plant molecular biology · 2023Article
- Signaling network controlling ROP-mediated tip growth in Arabidopsis and beyond.Plant communications · 2023Review
- A small Rho GTPase OsRacB is required for pollen germination in rice.Development, growth & differentiation · 2022Article
- Calmodulin Domain Protein Kinase PiCDPK1 Regulates Pollen Tube Growth Polarity through Interaction with RhoGDI.Plants (Basel, Switzerland) · 2022Article
- What are the key mechanisms that alter the morphology of stigmatic papillae inPlant signaling & behavior · 2021Review
- Comparative transcriptomic analysis reveals conserved programmes underpinning organogenesis and reproduction in land plants.Nature plants · 2021Article
- Hyperoside promotes pollen tube growth by regulating the depolymerization effect of actin-depolymerizing factor 1 on microfilaments in okra.Horticulture research · 2021Article
- Function of membrane domains in rho-of-plant signaling.Plant physiology · 2021Review
- The quest for the central players governing pollen tube growth and guidance.Plant physiology · 2021Review
- Review
- TheFrontiers in plant science · 2021Article
Corrections and comments
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Authors and funding
6 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Pollen tubes deliver sperms to the ovule for fertilization via tip growth. The rapid turnover of F-actin in pollen tube tips plays an important role in this process. In this study, we demonstrate that Arabidopsis thaliana RIC1, a member of the ROP-interactive CRIB motif-containing protein family, regulates pollen tube growth via its F-actin severing activity. Knockout of RIC1 enhanced pollen tube elongation, while overexpression of RIC1 dramatically reduced tube growth. Pharmacological analysis indicated that RIC1 affected F-actin dynamics in pollen tubes. In vitro biochemical assays revealed that RIC1 directly bound and severed F-actin in the presence of Ca(2+) in addition to interfering with F-actin turnover by capping F-actin at the barbed ends. In vivo, RIC1 localized primarily to the apical plasma membrane (PM) of pollen tubes. The level of RIC1 at the apical PM oscillated during pollen tube growth. The frequency of F-actin severing at the apex was notably decreased in ric1-1 pollen tubes but was increased in pollen tubes overexpressing RIC1. We propose that RIC1 regulates F-actin dynamics at the apical PM as well as the cytosol by severing F-actin and capping the barbed ends in the cytoplasm, establishing a novel mechanism that underlies the regulation of pollen tube growth.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.