Abstract:
BACKGROUND AND AIMS:The tam (tardy asynchronous meiosis) mutant of Arabidopsis thaliana, which exhibits a modified cytokinesis with a switch from simultaneous to successive cytokinesis, was used to perform a direct test of the implication of cytokinesis in aperture-pattern ontogeny of angiosperm pollen grains. The aperture pattern corresponds to the number and arrangement of apertures (areas of the pollen wall permitting pollen tube germination) on the surface of the pollen grain. METHODS:A comparative analysis of meiosis and aperture distribution was performed in two mutant strains of arabidopsis: quartet and quartet-tam. KEY RESULTS:While the number of apertures is not affected in the quartet-tam mutant, the arrangement of the three apertures is modified compared with the quartet, resulting in a different aperture pattern. CONCLUSIONS:These results directly demonstrate the relationship between the type of sporocytic cytokinesis and pollen aperture-pattern ontogeny.
journal_name
Ann Botjournal_title
Annals of botanyauthors
Albert B,Raquin C,Prigent M,Nadot S,Brisset F,Yang M,Ressayre Adoi
10.1093/aob/mcr074subject
Has Abstractpub_date
2011-06-01 00:00:00pages
1421-6issue
8eissn
0305-7364issn
1095-8290pii
mcr074journal_volume
107pub_type
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