Nucleolus-associated chromatin domains are maintained under heat stress, despite nucleolar reorganization in Arabidopsis thaliana.

Journal of Plant Research
Ariadna Picart-PicoloFrédéric Pontvianne

Abstract

Several layers of mechanisms participate in plant adaptation to heat-stress. For example, the plant metabolism switches from cell growth mode to stress adaptation mode. Ribosome biogenesis is one of the most energy costly pathways. That biogenesis process occurs in the nucleolus, the largest nuclear compartment, whose structure is highly dependent on this pathway. We used a nucleolar marker to track the structure of the nucleolus, and revealed a change in its sub-nucleolar distribution under heat stress. In addition, the nucleolus is implicated in other cellular processes, such as genome organization within the nucleus. However, our analyses of nucleolus-associated chromatin domains under heat stress did not reveal significant differences compared to the control plants, suggesting a lack of connection between two of the main functions of the nucleolus: ribosome biogenesis and nuclear organization.

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Citations

Jun 20, 2020·Journal of Experimental Botany·Ana Paula SantosSara Farrona
Jul 9, 2020·Journal of Experimental Botany·Ying HuangJuan Sebastian Ramirez-Prado
Jun 11, 2020·Journal of Plant Research·Yuki Sakamoto, Takuya Sakamoto
Oct 10, 2020·Genome Research·Ariadna Picart-PicoloFrédéric Pontvianne
Jun 1, 2021·Nucleus·Marco Di Stefano, Hans-Wilhelm Nützmann

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Datasets Mentioned

BETA
PRJEB36061

Methods Mentioned

BETA
electron microscopy
RNA-seq
Assisted Cell Sorting
Illumina sequencing

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