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Título: | Cell cycle acceleration and changes in essential nuclear functions induced by simulated microgravity in a synchronized Arabidopsis cell culture |
Otros títulos: | Cell cycle and nuclear changes under microgravity | Autor: | Kamal, Khaled Y. CSIC ORCID CVN; Herranz, Raúl CSIC ORCID CVN ; van Loon, Jack JWA; Medina, F. Javier CSIC ORCID CVN | Palabras clave: | Altered Gravity Cell proliferation Chromatin remodeling Flow cytometry Immunofluorescence microscopy Nucleolus Ribosome Biogenesis Transcription qPCR |
Fecha de publicación: | feb-2019 | Editor: | John Wiley & Sons | Citación: | Plant Cell Environment 42(2):480-494 (2019) | Resumen: | Zero-gravity is an environmental challenge unknown to organisms throughout evolution on Earth. Nevertheless, plants are sensitive to altered gravity, as exemplified by changes in meristematic cell proliferation and growth. We found that synchronized Arabidopsis cultured cells exposed to simulated microgravity showed a shortened cell cycle, caused by a shorter G2/M phase and a slightly longer G1 phase. The analysis of selected marker genes and proteins by qPCR and flow cytometry in synchronic G1 and G2 subpopulations indicated changes in gene expression of core cell cycle regulators and chromatin-modifying factors, confirming that microgravity induced misregulation of G2/M and G1/S checkpoints and chromatin remodeling. Changes in chromatin-based regulation included higher DNA methylation and lower histone acetylation, increased chromatin condensation and overall depletion of nuclear transcription. Estimation of ribosome biogenesis rate using nucleolar parameters and selected nucleolar genes and proteins indicated reduced nucleolar activity under simulated microgravity, especially at G2/M. These results expand our knowledge of how meristematic cells are affected by real and simulated microgravity. Counteracting this cellular stress is necessary for plant culture in space exploration. | Descripción: | 50 p.-8 fig.-8 fig. supl.-2 tab.supl. | Versión del editor: | https://doi.org/10.1111/pce.13422 | URI: | http://hdl.handle.net/10261/168849 | DOI: | 10.1111/pce.13422 | ISSN: | 0140-7791 | E-ISSN: | 1365-3040 |
Aparece en las colecciones: | (CIB) Artículos |
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2018_07 Medina_Plant Cell Environ_Postprint.pdf | Postprint | 3,52 MB | Adobe PDF | Visualizar/Abrir |
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