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Articles by Heather N. Cartwright in JoVE
JoVE Bioengineering
Time-lapse imagens de fluorescência de crescimento de raiz Arabidopsis com Manipulação acelerada do meio root usando o RootChip
1Department of Plant Biology, Carnegie Institution for Science, 2Howard Hughes Medical Institute, 3Departments of Applied Physics and Bioengineering, Stanford University, 4Department of Microsystems Engineering (IMTEK) and Center for Biological Signaling Studies (BIOSS), University of Freiburg
Este artigo fornece um protocolo para o cultivo de mudas de Arabidopsis no RootChip, uma plataforma microfluídica imagem que combina controle automatizado das condições de crescimento com acompanhamento raiz microscópica e FRET baseado em medição de níveis de metabólitos intracelulares.
Other articles by Heather N. Cartwright on PubMed
Control of the Mitotic Cleavage Plane by Local Epithelial Topology
For nearly 150 years, it has been recognized that cell shape strongly influences the orientation of the mitotic cleavage plane (e.g., Hofmeister, 1863). However, we still understand little about the complex interplay between cell shape and cleavage-plane orientation in epithelia, where polygonal cell geometries emerge from multiple factors, including cell packing, cell growth, and cell division itself. Here, using mechanical simulations, we show that the polygonal shapes of individual cells can systematically bias the long-axis orientations of their adjacent mitotic neighbors. Strikingly, analyses of both animal epithelia and plant epidermis confirm a robust and nearly identical correlation between local cell topology and cleavage-plane orientation in vivo. Using simple mathematics, we show that this effect derives from fundamental packing constraints. Our results suggest that local epithelial topology is a key determinant of cleavage-plane orientation, and that cleavage-plane bias may be a widespread property of polygonal cell sheets in plants and animals.
