Cited by 44Light effects on plantsPhotosynthetic Processes and MechanismsPlant Molecular Biology Research

Light-Induced Movements of Chloroplasts and Nuclei Are Regulated in Both Cp-Actin-Filament-Dependent and -Independent Manners in Arabidopsis thaliana

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Suetsugu, Noriyuki, Higa, Takeshi, Gotoh, Eiji, Wada, Masamitsu·2016·PLOS ONE

Abstract

Light-induced chloroplast movement and attachment to the plasma membrane are dependent on actin filaments. In Arabidopsis thaliana, the short actin filaments on the chloroplast envelope, cp-actin filaments, are essential for chloroplast movement and positioning. Furthermore, cp-actin-filament-mediated chloroplast movement is necessary for the strong-light-induced nuclear avoidance response. The proteins CHLOROPLAST UNUSUAL POSITIONING 1 (CHUP1), KINESIN-LIKE PROTEIN FOR ACTIN-BASED CHLOROPLAST MOVEMENT 1 (KAC1) and KAC2 are required for the generation and/or maintenance of cp-actin filaments in Arabidopsis. In land plants, CHUP1 and KAC family proteins play pivotal roles in the proper movement of chloroplasts and their attachment to the plasma membrane. Here, we report similar but distinct phenotypes in chloroplast and nuclear photorelocation movements between chup1 and kac1kac2 mutants. Measurement of chloroplast photorelocation movement indicated that kac1kac2, but not chup1, exhibited a clear strong-light-induced increase in leaf transmittance changes. The chloroplast movement in kac1kac2 depended on phototropin 2, CHUP1 and two other regulators for cp-actin filaments, PLASTID MOVEMENT IMPAIRED 1 and THRUMIN 1. Furthermore, kac1kac2 retained a weak but significant nuclear avoidance response although chup1 displayed a severe defect in the nuclear avoidance response. The kac1kac2chup1 triple mutant was completely defective in both chloroplast and nuclear avoidance responses. These results indicate that CHUP1 and the KACs function somewhat independently, but interdependently mediate both chloroplast and nuclear photorelocation movements.

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  1. [4]Wada M, Suetsugu N. Chloroplast motility In: Assmann SM, Liu B (eds) The Plant Sciences–Cell Biology. http://www.springerreference.com. Springer-Verlag, Berlin Heidelberg; 2013 doi: 10.1007/SpringerReference_368553 2013-10-01 07:42:21 UTC · DOI
  2. [37]Gabryś H, Walczak T. Photometric study of chloroplast photorelocations in leaves of land plants. Acta Physiol Plant. 1980; 4: 281– 290.

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Authors
Suetsugu, N., Higa, T., Gotoh, E., & Wada, M.
Affiliations
Kyushu University (JP)
Corresponding author
Wada, Masamitsu
Venue
PLOS ONE
Published
2016-06-16
Volume
11
Issue
6
Pages
e0157429
ISSN
1932-6203 (ISSN-L)
OpenAlex
W2442090427
Cited by
44
References
42
Citations by year
2026: 3 · 2025: 1 · 2024: 4 · 2023: 4 · 2022: 9 · 2021: 5 · 2020: 2 · 2019: 5 · 2018: 3 · 2017: 5 · 2016: 3
FWCI
6.25
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Institutional Repositories DataBase (IRDB) (submittedVersion, other-oa)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Kyoto University Research Information Repository (Kyoto University) (submittedVersion, cc-by)
Funders
Japan Society for the Promotion of Science (20227001, 22657016, 23120523, 20870030)
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 › Agricultural and Biological Sciences › Plant Science › Plant Molecular Biology Research
Keywords
F-actin, phototropin 2, Arabidopsis thaliana, leaf transmittance, kinesin-like protein
MeSH terms
Cell Membrane, Cell Nucleus, Chloroplasts, Light, Microfilament Proteins, Actin Cytoskeleton, Movement, Kinesins, Arabidopsis, Gene Expression Regulation, Plant, Plant Leaves, Arabidopsis Proteins, Intracellular Signaling Peptides and Proteins, Phototropins, Plant Cells, Chloroplast Proteins

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