University of Birmingham LEAFY maintains apical stem cell activity during shoot development in the fern Ceratopteris richardii
University of Birmingham LEAFY maintains apical stem cell activity during shoot development in the fern Ceratopteris richardii
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伯明翰大学 LEAFY 在蕨类植物 Ceratopteris richardii 芽发育过程中维持顶端干细胞活性
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
S. D. Stilio
中科院分区：
文献类型：
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作者：
A. Plackett;S. Conway;Kristen D Hazelton;Hewett;H. RabbinowitschEster;J. Langdale;Di Stilio;A. Plackett;Hewett Hazelton;Vero´nica;S. D. Stilio
在陆地植物进化过程中，有限的孢子轴（保留在现存的苔藓植物（例如苔藓）中）逐渐转化为不确定的分支芽，具有形成花的专门生殖轴。LEAFY转录因子，这是所需的第一个合子细胞分裂的藓类植物和开花植物的花分生组织的身份，可能促进了这些过渡期间的发展创新。然而，绘制LEAFY进化轨迹一直具有挑战性，因为苔藓和开花植物之间没有功能重叠，也没有来自中间谱系的功能数据。在这里，我们报告了一个转基因分析的蕨类植物Ceratopteris richardii，揭示了作用叶在维持细胞分裂的顶端干细胞的单倍体和二倍体阶段的生命周期。这些结果支持了一个进化轨迹，其中促进细胞增殖的祖先LEAFY模块随着新的芽发育环境的出现而逐渐被吸收、适应和特化
During land plant evolution, determinate spore-bearing axes (retained in extant bryophytes such as mosses) were progressively transformed into indeterminate branching shoots with specialized reproductive axes that form flowers. The LEAFY transcription factor, which is required for the first zygotic cell division in mosses and primarily for floral meristem identity in flowering plants, may have facilitated developmental innovations during these transitions. Mapping the LEAFY evolutionary trajectory has been challenging, however, because there is no functional overlap between mosses and flowering plants, and no functional data from intervening lineages. Here, we report a transgenic analysis in the fern Ceratopteris richardii that reveals a role for LEAFY in maintaining cell divisions in the apical stem cells of both haploid and diploid phases of the lifecycle. These results support an evolutionary trajectory in which an ancestral LEAFY module that promotes cell proliferation was progressively co-opted, adapted and specialized as novel shoot developmental contexts emerged
影响因子：
11.6
作者：
KELLY, AJ;BONNLANDER, MB;MEEKSWAGNER, DR
通讯作者：
MEEKSWAGNER, DR