Transcriptional repression specifies the central cell for double fertilization
Double fertilization is a key innovation for the evolutionary success of angiosperms by which the two fertilized female gametes, the egg cell and central cell, generate the embryo and endosperm, respectively. The female gametophyte (embryo sac) enclosed in the sporophyte is derived from a one-celled...
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| Veröffentlicht in: | Proceedings of the National Academy of Sciences - PNAS 2020-03, Vol.117 (11), p.6231-6236 |
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| container_title | Proceedings of the National Academy of Sciences - PNAS |
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| creator | Zhang, Meng-Xia Zhu, Shan-Shan Xu, Yong-Chao Guo, Ya-Long Yang, Wei-Cai Li, Hong-Ju |
| description | Double fertilization is a key innovation for the evolutionary success of angiosperms by which the two fertilized female gametes, the egg cell and central cell, generate the embryo and endosperm, respectively. The female gametophyte (embryo sac) enclosed in the sporophyte is derived from a one-celled haploid cell lineage. It undergoes successive events of mitotic divisions, cellularization, and cell specification to give rise to the mature embryo sac, which contains the two female gametes accompanied by two types of accessory cells, namely synergids and antipodals. How the cell fate of the central cell is specified has long been equivocal and is further complicated by the structural diversity of female gametophyte across plant taxa. Here, MADS-box protein AGL80 was verified as a transcriptional repressor that directly suppresses the expression of accessory cell-specific genes to specify the central cell. Further genetic rescue and phylogenetic assay of the AGL80 orthologs revealed a possible conservedmechanism in the Brassicaceae family. Results from this study provide insight into the molecular determination of the second female gamete cell in Brassicaceae. |
| doi_str_mv | 10.1073/pnas.1909465117 |
| format | Article |
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The female gametophyte (embryo sac) enclosed in the sporophyte is derived from a one-celled haploid cell lineage. It undergoes successive events of mitotic divisions, cellularization, and cell specification to give rise to the mature embryo sac, which contains the two female gametes accompanied by two types of accessory cells, namely synergids and antipodals. How the cell fate of the central cell is specified has long been equivocal and is further complicated by the structural diversity of female gametophyte across plant taxa. Here, MADS-box protein AGL80 was verified as a transcriptional repressor that directly suppresses the expression of accessory cell-specific genes to specify the central cell. Further genetic rescue and phylogenetic assay of the AGL80 orthologs revealed a possible conservedmechanism in the Brassicaceae family. Results from this study provide insight into the molecular determination of the second female gamete cell in Brassicaceae.</description><identifier>ISSN: 0027-8424</identifier><identifier>EISSN: 1091-6490</identifier><identifier>DOI: 10.1073/pnas.1909465117</identifier><identifier>PMID: 32132210</identifier><language>eng</language><publisher>United States: National Academy of Sciences</publisher><subject>Angiosperms ; Antigen-presenting cells ; Biological Sciences ; Brassicaceae ; Cell fate ; Cell lineage ; Embryos ; Endosperm ; Fertilization ; Gametes ; Gene expression ; Gene silencing ; Phylogeny</subject><ispartof>Proceedings of the National Academy of Sciences - PNAS, 2020-03, Vol.117 (11), p.6231-6236</ispartof><rights>Copyright National Academy of Sciences Mar 17, 2020</rights><rights>2020</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c509t-bb917e40ae03f676a3226f5b83a6a9136ac6a97f3c279afe69ef2ede668430e73</citedby><cites>FETCH-LOGICAL-c509t-bb917e40ae03f676a3226f5b83a6a9136ac6a97f3c279afe69ef2ede668430e73</cites><orcidid>0000-0002-1378-4049 ; 0000-0002-4643-4889 ; 0000-0003-0064-4626 ; 0000-0003-0252-7079</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.jstor.org/stable/pdf/26929390$$EPDF$$P50$$Gjstor$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/26929390$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>230,314,727,780,784,803,885,27924,27925,53791,53793,58017,58250</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/32132210$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Zhang, Meng-Xia</creatorcontrib><creatorcontrib>Zhu, Shan-Shan</creatorcontrib><creatorcontrib>Xu, Yong-Chao</creatorcontrib><creatorcontrib>Guo, Ya-Long</creatorcontrib><creatorcontrib>Yang, Wei-Cai</creatorcontrib><creatorcontrib>Li, Hong-Ju</creatorcontrib><title>Transcriptional repression specifies the central cell for double fertilization</title><title>Proceedings of the National Academy of Sciences - PNAS</title><addtitle>Proc Natl Acad Sci U S A</addtitle><description>Double fertilization is a key innovation for the evolutionary success of angiosperms by which the two fertilized female gametes, the egg cell and central cell, generate the embryo and endosperm, respectively. 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| source | JSTOR Archive Collection A-Z Listing; PubMed Central; Alma/SFX Local Collection; Free Full-Text Journals in Chemistry |
| subjects | Angiosperms Antigen-presenting cells Biological Sciences Brassicaceae Cell fate Cell lineage Embryos Endosperm Fertilization Gametes Gene expression Gene silencing Phylogeny |
| title | Transcriptional repression specifies the central cell for double fertilization |
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