Cited by 123Light effects on plantsPhotosynthetic Processes and MechanismsPhotoreceptor and optogenetics research

Blue Light-Induced Chloroplast Relocation in Arabidopsis thaliana as Analyzed by Microbeam Irradiation

Kagawa, T., Wada, M.·2000·Plant and Cell Physiology

Abstract

Chloroplast relocation in mesophyll cells of Arabidopsis thaliana was observed microscopically and analyzed by microbeam irradiation. Chloroplasts located along the anticlinal walls in dark-adapted cells. When part of a cell was irradiated with a microbeam of high fluence rate blue light (B) simultaneously with background red light (R) on the whole cell, the chloroplasts moved towards the B-irradiated area, but did not enter the beam. The background R illumination activated cytoplasmic motility as well as chloroplast movement. Without R illumination, there was little chloroplast relocation. In light-adapted cells in which the chloroplasts were spread over the cell surface perpendicular to the incident light, R-illumination had the same effect. Under background R, the chloroplasts moved out of the area irradiated with a B microbeam of 8 or 30 W m(-2) (avoidance response), but chloroplasts outside the beam moved towards the area irradiated with the B microbeam (accumulation response). These results suggest that the signals for accumulation and avoidance responses were generated in a single cell by high fluence rate B. cry1cry2, npq1 and nph1 mutants showed B-induced chloroplast relocation. Both the accumulation and avoidance responses were observed in all the mutants, although in the nph1 mutant, the sensitivity of accumulation movement was slightly lower than that of the wild type. We discuss the possible photoreceptor for B-induced chloroplast relocation.

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Crossref · 10.1093/pcp/41.1.84

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  • Phototropins mediate stomatal opening, leaf extension, and leaf positioning in Arabidopsis.

    “Phototropins are commonly observed in higher and lower plants, in addition to mediate phototropism and chloroplast movement, phototropins mediate stomatal opening, leaf extension, and leaf positioning in Arabidopsis”

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Authors
Kagawa, T., & Wada, M.
Affiliations
National Institute for Basic Biology (JP)
Venue
Plant and Cell Physiology
Published
2000-01-01
Volume
41
Issue
1
Pages
84-93
ISSN
  • 0032-0781 (ISSN-L)
  • 1471-9053
OpenAlex
W2130782872
Cited by
123
References
35
Citations by year
2026: 2 · 2025: 1 · 2024: 6 · 2023: 4 · 2022: 4 · 2021: 2 · 2020: 1 · 2019: 1 · 2018: 5 · 2017: 3 · 2016: 6 · 2015: 2 · 2014: 1 · 2013: 4 · 2012: 9
FWCI
12.28
Type
journal article
Language
en
Open access
closed
Locations
  • Plant and Cell Physiology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Light effects on plants
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Photosynthetic Processes and Mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Photoreceptor and optogenetics research
Keywords
blue light, Arabidopsis thaliana, microbeam irradiation, cytoplasmic streaming, phototropism, avoidance response, photoreceptors, mesophyll cells
MeSH terms
Adaptation, Physiological, Chloroplasts, Cytoplasmic Streaming, Darkness, Light, Mutation, Arabidopsis, Plant Leaves, Photosynthetic Reaction Center Complex Proteins

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