Aberrant cell plate formation in the Arabidopsis thaliana microtubule organization 1 mutant
Aberrant cell plate formation in the Arabidopsis thaliana microtubule organization 1 mutant
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DOI：
10.1093/pcp/pci068
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发表时间：
2005-04-01
影响因子：
4.9
通讯作者：
Hepler, PK
中科院分区：
文献类型：
--
作者：
Eleftheriou, EP;Baskin, TI;Hepler, PK
微管组织1编码拟南芥微管相关蛋白，但不同的等位基因有矛盾的表型。据报道，原始突变的mor 1等位基因具有破坏的皮层微管、肿胀的器官和正常的胞质分裂，而其他等位基因，胚胎致死的双子花粉1（gem 1），具有缺陷的花粉胞质分裂。为了确定MOR 1是否在胞质分裂中发挥作用，我们研究了原始MOR 1 -1等位基因根部细胞分裂的超微结构。细胞板错位，分支和曲折;形成细胞板保持部分泡状，电子致密或层状内容物。成膜体微管丰富，但组织异常。因此，MOR 1在成膜细胞和皮层阵列中发挥作用。
MICROTUBULE ORGANIZATION 1 encodes a microtubule-associated protein in Arabidopsis thaliana but different alleles have contradictory phenotypes. The original mutant mor1 alleles were reported to have disrupted cortical microtubules, swollen organs and normal cytokinesis, whereas other alleles, embryo-lethal gemini pollen 1 (gem1), have defective pollen cytokinesis. To determine whether MOR1 functions generally in cytokinesis, we examined the ultrastructure of cell division in roots of the original mor1-1 allele. Cell plates are misaligned, branched and meandering; the forming cell plates remain partly vesicular, with electron-dense or lamellar content. Phragmoplast microtubules are abundant but organized aberrantly. Thus, MOR1 functions in both phragmoplast and cortical arrays.