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.

中文翻译：

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尽管在拟南芥中核仁重组，但核仁相关的染色质结构域仍在热应激下得以维持。

多种机制参与植物对热胁迫的适应。例如，植物代谢从细胞生长模式切换到胁迫适应模式。核糖体生物发生是最耗能的途径之一。该生物发生过程发生在核仁中，核仁是最大的核区室，其结构高度依赖于该途径。我们使用了一个核仁标记来追踪核仁的结构，并揭示了在热应激下其亚核仁分布的变化。另外，核仁与其他细胞过程有关，例如核内的基因组组织。但是，我们对热胁迫下与核仁相关的染色质域的分析与对照植物相比没有发现显着差异，