Journal
PLANT JOURNAL
Volume 36, Issue 1, Pages 1-11Publisher
BLACKWELL PUBLISHING LTD
DOI: 10.1046/j.1365-313X.2003.01850.x
Keywords
Arabidopsis; meiosis; meu13(+); HOP2
Categories
Funding
- Biotechnology and Biological Sciences Research Council [BBS/E/J/00000594] Funding Source: researchfish
- Biotechnology and Biological Sciences Research Council [BBS/E/J/00000594] Funding Source: Medline
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A new Arabidopsis meiotic mutant has been isolated. Homozygous ahp2-1(Arabidopsis homologue pairing 2) plants were sterile because of failure of both male and female gametophyte development. Fluorescent in situ hybridisation showed that in ahp2-1 male meiocytes, chromosomes did not form bivalents during prophase I and instead seemed to associate indiscriminately. Chromosome fragmentation, chromatin bridges and unbalanced segregation were seen in anaphase I and anaphase II. The ahp2-1 mutation was caused by a T-DNA insertion in an Arabidopsis homologue of meu13(+), which has been implicated in homologous chromosome pairing during meiosis in Schizosaccharomyces pombe. Our results suggest that meu13(+) function is conserved in higher eukaryotes and support the idea that Arabidopsis, yeast and mouse share a pairing pathway that is not present in Drosophila melanogaster and Caenorhabditis elegans.
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