The Arabidopsis MutS homolog AtMSH4 functions at an early step in recombination: Evidence for two classes of recombination in Arabidopsis

Article Abstract:

The identification and characterization of the Arabidopsis homologue of MSH4 (AtMSH4) is reported which can only be detected in floral tissues, consistent with a role in reproduction. Immunofluorescence studies indicate that its expression is limited to early meiotic prophase I, preceding the synapsis of homologous chromosomes.

Methods, Arabidopsis, Immunofluorescence, Fluorescent antibody technique

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ATM and ATR make distinct contributions to chromosome end protection and the maintenance of telomeric DNA in Arabidopsis

Article Abstract:

The role of ATM and ATR at telomeres in Arabidopsis thaliana, a higher eukaryote that tolerates disruption of both of these genes is explored. Results indicate that ATM is involved in protecting chromosome ends in cells with short telomeres, while ATR is required for maintenance of telomeric DNA.

Telomeres

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The Arabidopsis synaptonemal complex protein ZYP1 is required for chromosome synapsis and normal fidelity of crossing over

Article Abstract:

Two virtually identical genes, ZYP1a and ZYP1b were identified in the Arabidopsis transverse filament (TF) protein. The Arabidopsis synaptonemal complex protein ZYP1 is essential for chromosome synapsis and normal fidelity of crossing over.

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