RSL4 Regulatory Network Acts as an Early Driver of Root Hair Growth at Low Temperature in Arabidopsis Thaliana

    April 2024 in “ bioRxiv (Cold Spring Harbor Laboratory) ”
    Tomás Urzúa Lehuedé, Victoria Berdión Gabarain, Tomás C. Moyano, Lucía Ferrero, Miguel Angel Ibeas, Hernán Salinas-Grenet, Gerardo Núñez-Lillo, Romina Acha, José Pedro López Pérez, Florencia Perotti, Virginia Miguel, Fiorella Paola Spies, Miguel A. Rosas, Michitaro Shibata, Diana Rosa Rodríguez-Garcia, Adrián A. Moreno, Keiko Sugimoto, Karen A. Sanguinet, Claudio Meneses, Raquel L. Chan, Federico Ariel, José M. Álvarez, José M. Estevez
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    TLDR A gene network led by RSL4 is crucial for early root hair growth in response to cold in Arabidopsis thaliana.
    The study identifies a gene regulatory network (GRN) that controls the early response of root hair (RH) growth to low temperatures in Arabidopsis thaliana. This GRN is regulated by specific transcription factors, including ROOT HAIR DEFECTIVE 6-LIKE 4 (RSL4), AtHB13, GTL1, and a newly identified MYB-like TF (AT2G01060). The research also pinpoints four downstream targets of RSL4—AtHB16, AtHB23, ERD7, and ERD10—that are suggested to play roles in RH development under low-temperature conditions. Functional analysis indicates that these components of the RSL4-dependent transcriptional cascade are influential in the RH growth response to low temperature, providing insight into how plants coordinate RH growth with environmental temperature and nutrient availability changes.
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