live-imaging-characterization-centromere-movements-during-male

Live Imaging Characterization of Centromere Movements During Male Meiotic Prophase in <em>Arabidopsis thaliana </em>

Meiosis is a cellular division, essential for sexual reproduction. During meiotic prophase, homologous chromosomes of maternal and paternal origin ...

Université Paris-Saclay, INRAE, AgroParisTech, Institute Jean-Pierre Bourgin for Plant Sciences (IJPB), 78000, Versailles, France

The spatial organization in the cell nucleus is tightly linked to genome functions such as gene regulation. Similarly, specific spatial arrangements of biological components such as macromolecular complexes, organelles and cells are involved in many biological functions. Spatial interactions among elementary components of biological systems define their relative positioning and are key determinants of spatial patterns. However, biological variability and the lack of appropriate spatial statistical methods and models limit our current ability to analyze these interactions. Here, we developed a framework to dissect spatial interactions and organization principles by combining unbiased statistical tests, multiple spatial descriptors and new spatial models. We used plant constitutive heterochromatin as a model system to demonstrate the potential of our framework. Our results challenge the common view of a peripheral organization of chromocenters, showing that chromocenters are arranged along both radial and lateral directions in the nuclear space and obey a multiscale organization with scale-dependent antagonistic effects. The proposed generic framework will be useful to identify determinants of spatial organizations and to question their interplay with biological functions.

Article	Year
Spatial modeling of biological patterns shows multiscale organization of Arabidopsis thaliana heterochromatin. Scientific reports\| PubMed ID: 33431919	2021
Publisher Correction: Spatial modeling of biological patterns shows multiscale organization of Arabidopsis thaliana heterochromatin. Scientific reports\| PubMed ID: 33976277	2021

Philippe Andrey

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