ORIGIN OF RECOGNITION COMPLEX 3 controls the development of maternal excess endosperm in the Paspalum simplex agamic complex (Poaceae)

© The Author(s) 2023. Published by Oxford University Press on behalf of the Society for Experimental Biology.

Bibliographische Detailangaben
Veröffentlicht in:Journal of experimental botany. - 1985. - 74(2023), 10 vom: 19. Mai, Seite 3074-3093
1. Verfasser: Bellucci, Michele (VerfasserIn)
Weitere Verfasser: Caceres, Maria Eugenia, Paolocci, Francesco, Vega, Juan Manuel, Ortiz, Juan Pablo Amelio, Ceccarelli, Marilena, De Marchis, Francesca, Pupilli, Fulvio
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2023
Zugriff auf das übergeordnete Werk:Journal of experimental botany
Schlagworte:Journal Article Research Support, Non-U.S. Gov't ORC3 Paspalum simplex Apomixis cell cycle interploidy crosses maternal excess endosperm
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520 |a Pseudogamous apomixis in Paspalum simplex generates seeds with embryos genetically identical to the mother plant and endosperms deviating from the canonical 2(maternal):1(paternal) parental genome contribution into a maternal excess 4m:1p genome ratio. In P. simplex, the gene homologous to that coding for subunit 3 of the ORIGIN OF RECOGNITION COMPLEX (PsORC3) exists in three isogenic forms: PsORC3a is apomixis specific and constitutively expressed in developing endosperm whereas PsORCb and PsORCc are up-regulated in sexual endosperms and silenced in apomictic ones. This raises the question of how the different arrangement and expression profiles of these three ORC3 isogenes are linked to seed development in interploidy crosses generating maternal excess endosperms. We demonstrate that down-regulation of PsORC3b in sexual tetraploid plants is sufficient to restore seed fertility in interploidy 4n×2n crosses and, in turn, its expression level at the transition from proliferating to endoreduplication endosperm developmental stages dictates the fate of these seeds. Furthermore, we show that only when being maternally inherited can PsORC3c up-regulate PsORC3b. Our findings lay the basis for an innovative route-based on ORC3 manipulation-to introgress the apomictic trait into sexual crops and overcome the fertilization barriers in interploidy crosses 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a ORC3 
650 4 |a Paspalum simplex 
650 4 |a Apomixis 
650 4 |a cell cycle 
650 4 |a interploidy crosses 
650 4 |a maternal excess endosperm 
700 1 |a Caceres, Maria Eugenia  |e verfasserin  |4 aut 
700 1 |a Paolocci, Francesco  |e verfasserin  |4 aut 
700 1 |a Vega, Juan Manuel  |e verfasserin  |4 aut 
700 1 |a Ortiz, Juan Pablo Amelio  |e verfasserin  |4 aut 
700 1 |a Ceccarelli, Marilena  |e verfasserin  |4 aut 
700 1 |a De Marchis, Francesca  |e verfasserin  |4 aut 
700 1 |a Pupilli, Fulvio  |e verfasserin  |4 aut 
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