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

root hair growth Arabidopsis thaliana gene regulatory network transcription factors ROOT HAIR DEFECTIVE 6-LIKE 4 RSL4 AtHB13 GTL1 MYB-like TF AT2G01060 AtHB16 AtHB23 ERD7 ERD10

Studysummary In this study, researchers identified a gene regulatory network in Arabidopsis that controls root hair growth under low-temperature conditions, revealing specific transcription factors and downstream targets that contribute to this growth response despite overall plant development being halted.

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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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research Cell Surface Receptor Kinase FERONIA Linked to Nutrient Sensor TORC Signaling Controls Root Hair Growth at Low Temperature Linked to Low Nitrate in Arabidopsis Thaliana

44 citations , January 2023 in “New Phytologist”

This study found that low temperature triggers root hair elongation in Arabidopsis thaliana through a FERONIA-ROP2-TORC signaling pathway, also activated by nitrogen deficiency.

research Root Hair Defective Six-Like 4 (RSL4) Promotes Root Hair Elongation by Transcriptionally Regulating the Expression of Genes Required for Cell Growth

75 citations , July 2016 in “New phytologist”

This study found that RSL4 in Arabidopsis thaliana regulates genes necessary for root hair elongation by controlling proteins involved in cell signaling, cell wall modification, and secretion.