{"ok":true,"nota":{"id":"f6dfbfe4fb25c5e6","slug":"un-gen-de-hepaticas-ayuda-a-entender-como-las-plantas-empezaron-a-form-f6dfbf","titulo":"Un gen de hepáticas ayuda a entender cómo las plantas empezaron a formar semillas","resumen":"Investigadores estudiaron el gen MpSDR4 en una hepática, una planta sin semillas, y lo compararon con sus versiones en plantas con semillas. Hallaron una duplicación génica que ocurrió justo antes de que aparecieran las semillas.","fuente":"biorxiv","fuenteNombre":"bioRxiv · preprints","color":"#be2628","autor":"Shan, J., Kua, J. M., Woojuh, J., Cutler, S., Graham, S. W., Song, L.","url":"https://www.biorxiv.org/content/10.64898/2026.10.21.760454v1?rss=1","imagen":"/hoy/portada/f6dfbfe4fb25c5e6","tema":"ciencia","subtemas":["botánica","evolución vegetal","genética","semillas","hormonas vegetales"],"entidades":["MpSDR4","bioRxiv"],"formato":"dato","entretenimiento":false,"pubTs":"2026-10-23T00:00:00.000Z","indexTs":"2026-10-23T12:03:18.526Z","hash":"c4338d8d31d236703f91771097f742eca4ce09f7e2c9409e24dc54e5423d7e8d","tsa":{"time":"Oct 23 12:03:53 2026 GMT","provider":"freetsa.org","sobre":"sello"},"stats":{"views":0,"likes":0,"clicks":0,"dwell":0},"tipo":"normal","registro":"hallazgo","porQueImporta":"El hallazgo muestra que muchas plantas heredaron un mismo mecanismo genético de sus antepasados sin semillas. Para alguien de acá, esto ayuda a entender cómo se diversificaron las plantas que hoy comemos y cultivamos. Un detalle clave: el trabajo todavía no está revisado por otros científicos, y el rol exacto del gen en la hepática sigue en estudio.","quienFirma":"bioRxiv (preprint; autores de la investigación sobre plantas)","confianza":"preprint","consulta":null},"sello":{"hash":"c4338d8d31d236703f91771097f742eca4ce09f7e2c9409e24dc54e5423d7e8d","sello":"c9a9fc312e4b2bef66bb8bd1c0acc6119fa5b36aa702ec7f89e2ff3995c82dcc","beacon":{"drand":{"cadena":"8990e7a9aaed2ffed73dbd7092123d6f289930540d7651336225dc172e51b2ce","ronda":6577533,"aleatorio":"c4aba0dd838f5aced1ee3ce73b5a8152f120dc443db083e10a01045483b7000d","tiempo":"2026-10-23T12:03:30.000Z"},"nist":{"cadena":2,"pulso":1995961,"salida":"F41B5D0D554B9AA93D86596521336D547B043E4F52A3C280F10F60EAE511ED1743D3E56670D4E53EB431734AC5B1B8CB5DCF96D1DB26F562D058604979415129","tiempo":"2026-10-23T12:03:00.000Z"},"noAntes":"2026-10-23T12:03:30.000Z"},"verificacion":{"drand":true,"nist":true},"tsa":{"time":"Oct 23 12:03:53 2026 GMT","provider":"freetsa.org","sobre":"sello"},"original":{"titulo":"Liverwort MpSDR4 regulates abscisic acid sensitivity and gemma cup growth","descripcion":"Complex traits often evolve by co-opting pre-existing genetic components. Orthologs of the transcriptional co-factor SEED DORMANCY 4 (SDR4) are found across seed-bearing and seed-free land plants. In flowering plants, loss-of-function mutants of sdr4 orthologs in rice and Arabidopsis exhibit opposite phenotypes in seed germination, a trait regulated by the phytohormone abscisic acid (ABA). We uncovered a major gene duplication event that closely preceded the origin of seed plants, by using a structure-informed molecular phylogenetic analysis. This duplication gave rise to the paralogous SDR4 and DIG/DIL clades, which are broadly retained across the seed plants. Investigating the role of SDR4","pubDate":"2026-10-23","url":"https://www.biorxiv.org/content/10.64898/2026.10.21.760454v1?rss=1"},"indexado":"2026-10-23T12:03:18.526Z"}}