A maize root tip system to study DNA replication programmes in somatic and endocycling nuclei during plant development
| Autor: | George Allen, Hardeep K. Gumber, Hank W. Bass, Tae-Jin Lee, William F. Thompson, Linda Hanley-Bowdoin, Gregg G. Hoffman, Emily E. Wear |
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| Rok vydání: | 2014 |
| Předmět: |
Genetics
Cell Nucleus DNA Replication Base Sequence DNA Plant Physiology DNA replication Context (language use) Plant Science Computational biology Biology Plant Roots Zea mays Nuclear DNA chemistry.chemical_compound Mitotic cell cycle chemistry Replication (statistics) Epigenetics Oligonucleotide Probes Mitosis DNA In Situ Hybridization Fluorescence |
| Zdroj: | Journal of experimental botany. 65(10) |
| ISSN: | 1460-2431 |
| Popis: | The progress of nuclear DNA replication is complex in both time and space, and may reflect several levels of chro-matin structure and 3-dimensional organization within the nucleus. To understand the relationship between DNA rep-lication and developmental programmes, it is important to examine replication and nuclear substructure in different developmental contexts including natural cell-cycle progressions in situ . Plant meristems offer an ideal opportunity to analyse such processes in the context of normal growth of an organism. Our current understanding of large-scale chromosomal DNA replication has been limited by the lack of appropriate tools to visualize DNA replication with high resolution at defined points within S phase. In this perspective, we discuss a promising new system that can be used to visualize DNA replication in isolated maize ( Zea mays L.) root tip nuclei after in planta pulse labelling with the thymi-dine analogue, 5-ethynyl-2 ′ -deoxyuridine (EdU). Mixed populations of EdU-labelled nuclei are then separated by flow cytometry into sequential stages of S phase and examined directly using 3-dimensional deconvolution microscopy to characterize spatial patterns of plant DNA replication. Combining spatiotemporal analyses with studies of replication and epigenetic inheritance at the molecular level enables an integrated experimental approach to problems of mitotic inheritance and cellular differentiation.Key words |
| Databáze: | OpenAIRE |
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