English
español
Please use this identifier to cite or link to this item:
http://hdl.handle.net/10261/156791
Share/Impact:
Statistics |
![]() ![]() ![]() |
|
|
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |||
|
Title: | The transition from somatic to germline identity shows conserved and specialized features during angiosperm evolution |
Authors: | Lora, Jorge ![]() ![]() |
Issue Date: | Oct-2017 |
Publisher: | John Wiley & Sons |
Citation: | Lora J, Herrero M, Tucker MR, Hormaza JI. The transition from somatic to germline identity shows conserved and specialized features during angiosperm evolution. New Phytologist 216 (2): 495–509 (2017) |
Abstract: | How and why specific plant cells adopt germline identity during ovule development has proved challenging to address, and the pathways that are active in the ovules of basal/early-divergent angiosperms possessing a multilayered nucellus are still unclear. Here, we compare megasporogenesis between two early-divergent angiosperms (Annona cherimola and Persea americana) and the evolutionarily derived Arabidopsis thaliana, studying the three-dimensional spatial position of the megaspore mother cell (MMC), the compositional details of the MMC wall and the location of PIN1 expression. Specific wall polymers distinguished the central position of the MMC and its meiotic products from surrounding tissues in early-divergent angiosperms, whereas, in A. thaliana, only callose (in mature MMCs) and arabinogalactan proteins (AGPs) (in megaspores) distinguished the germline. However, PIN1 expression, which regulates polar auxin transport, was observed around the MMC in the single-layer nucellus of A. thaliana and in the multilayered nucellus of A. cherimola, or close to the MMC in P. americana. The data reveal a similar microenvironment in relation to auxin during megasporogenesis in all three species. However, the different wall polymers that mark MMC fate in early-divergent angiosperms may reflect a specific response to mechanical stress during differentiation, or the specific recruitment of polymers to sustain MMC growth. |
Description: | 15 Pags.- 8 Figs. The definitive version is available at: http://nph.onlinelibrary.wiley.com/hub/journal/10.1111/(ISSN)1469-8137 |
Publisher version (URL): | http://dx.doi.org/10.1111/nph.14330 |
URI: | http://hdl.handle.net/10261/156791 |
DOI: | http://dx.doi.org/10.1111/nph.14330 |
ISSN: | 0028-646X |
E-ISSN: | 1469-8137 |
Appears in Collections: | (EEAD) Artículos (IHSM) Artículos |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
HormazaI_NewPhytol_2017.pdf | 676,39 kB | Adobe PDF | ![]() View/Open |
Show full item record
Review this work
Review this work
WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.