连续的小孢子发生影响拟南芥 tam 突变体花粉孔模式。
Successive microsporogenesis affects pollen aperture pattern in the tam mutant of Arabidopsis thaliana.
机构信息
Laboratoire Ecologie Systématique et Evolution, Univ. Paris-Sud, Orsay, France.
出版信息
Ann Bot. 2011 Jun;107(8):1421-6. doi: 10.1093/aob/mcr074. Epub 2011 Apr 12.
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.
摘要
背景与目的
拟南芥的 tam（迟发性异步减数分裂）突变体表现出一种从同时到相继的胞质分裂的改变，被用于对胞质分裂在被子植物花粉粒孔模式发生中的作用进行直接测试。孔模式对应于花粉粒表面上的孔（花粉壁上允许花粉管发芽的区域）的数量和排列。
方法
在两个拟南芥突变体菌株 quartet 和 quartet-tam 中进行减数分裂和孔分布的比较分析。
主要结果
虽然 quartet-tam 突变体中的孔数没有受到影响，但与 quartet 相比，三个孔的排列发生了改变，导致了不同的孔模式。
结论
这些结果直接证明了孢子质胞质分裂的类型与花粉孔模式发生之间的关系。
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