5 research outputs found

    The nuclear envelope in higher plant mitosis and meiosis

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    Mitosis and meiosis in higher plants involves significant reconfiguration of the nuclear envelope and the proteins that interact with it. The dynamic series of events involves a range of interactions, movement, breakdown and reformation of this complex system. Recently, progress has been made in identifying and characterising the protein and membrane interactome that performs these complex tasks, including constituents of the nuclear envelope, the cytoskeleton, nucleoskeleton and chromatin. This review will present current understanding of these interactions and advances in knowledge of the processes for the breakdown and reformation of the nuclear envelope during cell divisions in plants

    The Role of Chromatin Domains in Plant Meiosis

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    In this teaching webinar for the INDEPTH Academy Dr Monica Pradillo Introduces the Role of Chromatin Domains on Plant Meiosis

    The Cdk1/Cdk2 homolog CDKA;1 controls the recombination landscape in Arabidopsis

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    Little is known how patterns of cross-over (CO) numbers and distribution during meiosis are established. Here, we reveal that cyclin-dependent kinase A;1 (CDKA;1), the homolog of human Cdk1 and Cdk2, is a major regulator of meiotic recombination in Arabidopsis. Arabidopsis plants with reduced CDKA;1 activity experienced a decrease of class I COs, especially lowering recombination rates in centromere-proximal regions. Interestingly, this reduction of type I CO did not affect CO assurance, a mechanism by which each chromosome receives at least one CO, resulting in all chromosomes exhibiting similar genetic lengths in weak loss-of-function cdka;1 mutants. Conversely, an increase of CDKA;1 activity resulted in elevated recombination frequencies. Thus, modulation of CDKA;1 kinase activity affects the number and placement of COs along the chromosome axis in a dose-dependent manner.</p
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