{"ok":true,"nota":{"id":"d679d2df179cf967","slug":"una-proteina-de-la-planta-de-laboratorio-regula-cuanto-crecen-sus-tall-d679d2","titulo":"Una proteína de la planta de laboratorio regula cuánto crecen sus tallos según la luz","resumen":"Científicos identificaron un factor de transcripción llamado GATA25 que, al activarse con la luz, aumenta la producción de TCP4 y hace que los tallos y pecíolos de la planta modelo Arabidopsis se alarguen. Lo comprobaron en experimentos de laboratorio con esta planta.","fuente":"biorxiv","fuenteNombre":"bioRxiv · preprints","color":"#be2628","autor":"Kim, K., Shin, J., Kim, W.-C.","url":"https://www.biorxiv.org/content/10.64898/2026.10.19.760297v1?rss=1","imagen":"/hoy/portada/d679d2df179cf967","tema":"ciencia","subtemas":["biología vegetal","crecimiento de plantas","fotoperiodo","genética vegetal"],"entidades":["bioRxiv","Arabidopsis thaliana","GATA25","TCP4"],"formato":"dato","entretenimiento":false,"pubTs":"2026-10-22T00:00:00.000Z","indexTs":"2026-10-22T21:54:18.823Z","hash":"97cacfc737a173bd2d9a24dde86504419fe7946a82669f71ee945236af130251","tsa":{"time":"Oct 22 21:55:20 2026 GMT","provider":"freetsa.org","sobre":"sello"},"stats":{"views":0,"likes":0,"clicks":0,"dwell":0},"tipo":"normal","registro":"hallazgo","porQueImporta":"Entender qué señales internas hacen que una planta crezca más o menos según la luz ayuda a pensar cultivos más eficientes en el futuro. Para quien trabaja en el campo o en huertas, esta clase de hallazgo es la base de la que luego salen variedades que aprovechan mejor el sol. Pero se trata de investigación básica sobre una planta de laboratorio, y de ahí a un cultivo comercial falta bastante camino.","quienFirma":"bioRxiv · preprints","confianza":"preprint","consulta":null},"sello":{"hash":"97cacfc737a173bd2d9a24dde86504419fe7946a82669f71ee945236af130251","sello":"71aa0b51b5a4a068721b3187afd3e3b8dee3401b17c01694c0d947e48895e0af","beacon":{"drand":{"cadena":"8990e7a9aaed2ffed73dbd7092123d6f289930540d7651336225dc172e51b2ce","ronda":6575836,"aleatorio":"a8739c6f28d7e03ed191a881119536d56c373334288c8dc3d26ef33eb54db44f","tiempo":"2026-10-22T21:55:00.000Z"},"nist":{"cadena":2,"pulso":1995117,"salida":"932C769A8B73E2CC53835512DA1C7CF78DC4B06757B136D8DCC28C89B61C25ED52E0DD74B99E06F83F83805D89C905466FC5BF54DA4D037DEA5F5312DBA4C659","tiempo":"2026-10-22T21:54:00.000Z"},"noAntes":"2026-10-22T21:55:00.000Z"},"verificacion":{"drand":true,"nist":true},"tsa":{"time":"Oct 22 21:55:20 2026 GMT","provider":"freetsa.org","sobre":"sello"},"original":{"titulo":"Light-dependent activation of TCP4 by the GATA25 transcription factor promotes petiole and hypocotyl elongation in Arabidopsis thaliana","descripcion":"Plants coordinate cell elongation with the daily light/dark cycle, an important adaptive strategy for optimizing growth under changing environmental conditions. However, the transcriptional mechanisms linking light signals to plant developmental growth remain poorly understood. In this study, we identified the GATA25 transcription factor as a regulator of petiole and hypocotyl elongation in response to light and photoperiod. Overexpression of GATA25 in Arabidopsis thaliana increased petiole and hypocotyl lengths and elevated TCP4 transcript levels. We demonstrated that GATA25 directly binds to the promoter of TCP4 and activates its transcription using transcriptional activation analysis, a g","pubDate":"2026-10-22","url":"https://www.biorxiv.org/content/10.64898/2026.10.19.760297v1?rss=1"},"indexado":"2026-10-22T21:54:18.823Z"}}