ArticlePlant signaling & behavior2007
Phototropin Mediated Relocation of Myosins in Arabidopsis thaliana.
Article in Plant signaling & behavior, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
6 citing papers in PubMed, 22 citations in OpenAlex.
- GLR Channels Are Involved in the Mechanism of Chloroplast Avoidance Response inPlants (Basel, Switzerland) · 2025Article
- Recovery of the cortical chloroplast layer in the green algaFrontiers in plant science · 2025Article
- CHLOROPLAST UNUSUAL POSITIONING 1 is a plant-specific actin polymerization factor regulating chloroplast movement.The Plant cell · 2024Article
- Rapid severing and motility of chloroplast-actin filaments are required for the chloroplast avoidance response in Arabidopsis.The Plant cell · 2013Article
- Why have chloroplasts developed a unique motility system?Plant signaling & behavior · 2010Review
- In vivo reorganization of the actin cytoskeleton in leaves of Nicotiana tabacum L. transformed with plastin-GFP. Correlation with light-activated chloroplast responses.BMC plant biology · 2009Article
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Authors and funding
2 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundThe mechanism of the light-dependent movements of chloroplasts is based on actin and myosin but its details are largely unknown. The movements are activated by blue light in terrestrial angiosperms. The aim of the present study was to determine the role of myosin associated with the chloroplast surface in the light-induced chloroplast responses in Arabidopsis thaliana. The localization of myosins was investigated under blue light intensities generating avoidance and accumulation responses of chloroplasts. The localization was compared in wild type plants and in phot2 mutant lacking the avoidance response.
resultsWild type and phot2 mutant plants were irradiated with strong (36 microEm(-2)s(-1)) and/or weak (0.8 microEm(-2)s(-1)) blue light. The leaf tissue was immunolabeled with antimyosin antibodies. Different arrangements of myosins were observed in the mesophyll depending on the fluence rate in wild type plants. In tissue irradiated with weak blue light myosins were associated with chloroplast envelopes. In contrast, in tissue irradiated with strong blue light chloroplasts were almost myosin-free. The effect did not occur in red light and in the phot2 mutant.
conclusionsMyosin displacement is blue light specific, i.e., it is associated with the activation of a specific blue-light photoreceptor. We suggest that the reorganization of myosins is essential for chloroplast movement. Myosins appear to be the final step of the signal transduction pathway starting with phototropin2 and leading to chloroplast movements.
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