ArticleProceedings of the National Academy of Sciences of the United States of America2009
Short actin-based mechanism for light-directed chloroplast movement in Arabidopsis.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 94 papers.
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94 citing papers in PubMed, 204 citations in OpenAlex.
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- Cytoskeletal control of development and environmental adaptation in plants.Science China. Life sciences · 2026Review
- Correlated Evolutionary Rates Reveal Novel Components and Cross-Compartment Connectivity in Plant Proteostasis Systems.Genome biology and evolution · 2026Article
- Optimal disk packing of chloroplasts in plant cells.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
- Membrane contact sites between chloroplasts and the pathogen interface underpin plant focal immune responses.The Plant cell · 2025Article
- Adaptive responses of plants to light stress: mechanisms of photoprotection and acclimation. A review.Frontiers in plant science · 2025Review
- CHUP1 restricts chloroplast movement and effector-triggered immunity in epidermal cells.The New phytologist · 2024Article
- Strategies for adaptation to high light in plants.aBIOTECH · 2024Review
- CHLOROPLAST UNUSUAL POSITIONING 1 is a plant-specific actin polymerization factor regulating chloroplast movement.The Plant cell · 2024Article
- Genetic adaptations in the population history of Arabidopsis thaliana.G3 (Bethesda, Md.) · 2023Article
- Exploring the Role of the Plant Actin Cytoskeleton: From Signaling to Cellular Functions.International journal of molecular sciences · 2023Review
- Statistical analysis of organelle movement using state-space models.Plant methods · 2023Article
- Chloroplasts in plant cells show active glassy behavior under low-light conditions.Proceedings of the National Academy of Sciences of the United States of America · 2023Article
- Formin protein DRT1 affects gross morphology and chloroplast relocation in rice.Plant physiology · 2023Article
- Article
- The action of enhancing weak light capture via phototropic growth and chloroplast movement in plants.Stress biology · 2022Review
- Light-induced displacement of PLASTID MOVEMENT IMPAIRED1 precedes light-dependent chloroplast movements.Plant physiology · 2022Article
- A PSTAIRE-type cyclin-dependent kinase controls light responses in land plants.Science advances · 2022Article
34 more citing papers are in PubMed but not listed here.
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Authors and funding
10 authors at 4 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Organelle movement is essential for proper function of living cells. In plants, these movements generally depend on actin filaments, but the underlying mechanism is unknown. Here, in Arabidopsis, we identify associations of short actin filaments along the chloroplast periphery on the plasma membrane side associated with chloroplast photorelocation and anchoring to the plasma membrane. We have termed these chloroplast-actin filaments (cp-actin filaments). Cp-actin filaments emerge from the chloroplast edge and exhibit rapid turnover. The presence of cp-actin filaments depends on an actin-binding protein, chloroplast unusual positioning1 (CHUP1), localized on the chloroplast envelope. chup1 mutant lacked cp-actin filaments but showed normal cytoplasmic actin filaments. When irradiated with blue light to induce chloroplast movement, cp-actin filaments relocalize to the leading edge of chloroplasts before and during photorelocation and are regulated by 2 phototropins, phot1 and phot2. Our findings suggest that plants evolved a unique actin-based mechanism for organelle movement.
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