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

Journal of Plant Research
Ariadna Picart-PicoloFrédéric Pontvianne


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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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


Methods Mentioned

electron microscopy
Assisted Cell Sorting
Illumina sequencing

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