Multiple impairments in male reproduction 1 (mimr1), a novel male-sterile mutant of Arabidopsis thaliana, shows several defects in male reproductive development
Multiple impairments in male reproduction 1 (mimr1), a novel male-sterile mutant of Arabidopsis thaliana, shows several defects in male reproductive development
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雄性生殖多重损伤1（mimr1）是拟南芥的一种新型雄性不育突变体，在雄性生殖发育中表现出多种缺陷
DOI：
10.1007/s12374-011-0227-8
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发表时间：
2012
影响因子：
2.9
通讯作者：
Hong
中科院分区：
文献类型：
--
作者：
Haigang Chen;Yuefeng Guan;Xue;Yu;Fen;Ju Gao;Que Zhou;Zhongnan Yang;Jia;Hong
我们已经在拟南芥中发现了一种新的雄性不育突变体，它表现出条件不育，但在干旱胁迫下恢复了生育力。这个突变体，在雄性生殖1中的多重损伤（mimr1），在营养和生殖发育中都表现出多效性缺陷。解剖电镜和扫描电镜观察发现，花粉粒开裂后不能有效地从花药室中释放出来，花药分化有缺陷。花柱和雄蕊花丝的生长也不正常。组织学分析表明，这些现象不仅是由于雄蕊的伸长明显减少，而且是由于雌蕊的伸长增加。遗传分析表明，mimr1为单位点隐性核突变体。该突变可以定位到3号染色体上一个与1200 kb区域紧密相连的位点。表达模式的荟萃分析显示了该区域的几个候选基因。以前没有报道过具有类似表型的突变体，这表明mimr1是一种新的雄性不育位点。MIMR1的鉴定将为进一步了解植物生殖器官发育的分子基础提供帮助。
We have characterized a new male-sterile mutant in Arabidopsis that exhibits conditional sterility but has restored fertility when drought-stressed. This mutant, multiple impairments in male reproduction 1 (mimr1), shows pleiotropic defects in both vegetative and reproductive development. Examination with dissecting and scanning electron microscopes revealed that its pollen grains are not effectively released from the anther locule after dehiscence, and anther differentiation is defective. Growth of the style and stamen filaments are also abnormal. Histological analysis demonstrated that these phenomena are due not only to a noticeably reduced extension of the stamen but also greater elongation of the pistil. Genetic analysis indicated that mimr1 is a single locus recessive nuclear mutant. The mutation can be mapped to a locus strongly linked to a 1200-kb region on Chromosome 3. Meta-analysis of expression patterning presented several candidate genes in that region. No mutants with similar phenotypes have previously been reported, suggesting that mimr1 is a novel male-sterile locus. Characterization of MIMR1 will provide further insights into the molecular basis for the development of plant reproductive organs.
影响因子：
5.1
作者：
Ariizumi, T;Hatakeyama, K;Toriyama, K
通讯作者：
Toriyama, K
影响因子：
7.2
作者：
Ariizumi, T;Hatakeyama, K;Toriyama, K
通讯作者：
Toriyama, K