Timing of meristem initiation and maintenance determines the morphology of fern gametophytes

Timing of meristem initiation and maintenance determines the morphology of fern gametophytes
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分生组织起始和维持的时间决定了蕨类配子体的形态

DOI:
10.1093/jxb/erab307
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发表时间:
2021
影响因子:
6.9
通讯作者:
Zhou, Yun
Zhou, Yun
中科院分区:
生物学1区
文献类型:
--
作者:
Wu, Xiao;Yan, An;McAdam, Scott A;Banks, Jo Ann;Zhang, Shaoling;Zhou, Yun

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陆生植物的世代交替发生在孢子体阶段和配子体阶段之间。种子植物的孢子体发育自我维持的多细胞分生组织,这些分生组织决定植物的结构。种子植物的配子体缺乏分生组织,是异养的。相反,无种子维管植物(包括蕨类植物)的配子体是自养和自由生活的,发育分生组织以维持其独立生长和增殖。与种子植物孢子体分生组织相比,蕨类植物配子体分生组织发育的细胞机制仍不清楚。在这里,使用共聚焦实时成像和计算分割和定量,我们确定了不同的细胞分裂模式与两个密切相关的蕨类植物,Pteris vittata andCeratopteris richardii配子体中两种不同类型的分生组织的启动和增殖。我们的研究结果揭示了两个分生组织之间的开关的简单时间有相当大的后果,两个蕨类植物的不同配子体形态。他们进一步提供了进化的见解配子体分生组织的功能和调节无种子维管植物。
The alternation of generations in land plants occurs between the sporophyte phase and the gametophyte phase. The sporophytes of seed plants develop self-maintained, multicellular meristems, and these meristems determine plant architecture. The gametophytes of seed plants lack meristems and are heterotrophic. In contrast, the gametophytes of seed-free vascular plants, including ferns, are autotrophic and free-living, developing meristems to sustain their independent growth and proliferation. Compared with meristems in the sporophytes of seed plants, the cellular mechanisms underlying meristem development in fern gametophytes remain largely unknown. Here, using confocal time-lapse live imaging and computational segmentation and quantification, we determined different patterns of cell divisions associated with the initiation and proliferation of two distinct types of meristems in gametophytes of two closely related Pteridaceae ferns,Pteris vittataandCeratopteris richardii. Our results reveal how the simple timing of a switch between two meristems has considerable consequences for the divergent gametophyte morphologies of the two ferns. They further provide evolutionary insight into the function and regulation of gametophyte meristems in seed-free vascular plants.
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: --
发表时间: 2018
期刊:
影响因子: --
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
通讯作者: S. D. Stilio
DOI: 10.1073/pnas.1606614113
发表时间: 2016-11-08
影响因子: 11.1
作者:
McAdam, Scott A. M.;Brodribb, Timothy J.;Sussmilch, Frances C.
通讯作者: Sussmilch, Frances C.
DOI: 10.1016/j.ydbio.2018.10.005
发表时间: 2018-12-15
影响因子: 2.7
作者:
Bartz, Mateusz;Gola, Edyta M.
通讯作者: Gola, Edyta M.
回顾同孢蕨类植物配子体发育的新分类,重点关注分生组织行为
DOI: --
发表时间: 2013
期刊:
影响因子: --
作者:
R. Imaichi
通讯作者: R. Imaichi
DOI: 10.1038/s41598-019-53968-8
发表时间: 2019-12-03
期刊: SCIENTIFIC REPORTS
影响因子: 4.6
作者:
Marchant, D. Blaine;Sessa, Emily B.;Soltis, Douglas E.
通讯作者: Soltis, Douglas E.