Publications by authors named "Claudio A Castanon-Suarez"
The MADS-box gene XAANTAL1 participates in Arabidopsis thaliana primary root growth and columella stem cell patterns in response to ROS, via direct regulation of PEROXIDASE 28 and RETINOBLASTOMA-RELATED genes.
Estephania Zluhan-Martínez Claudio A Castañón-Suárez Mario A Gutiérrez-Rodríguez Fernando Lledías Tao Zhang
J Exp Bot
January 2025
Article Synopsis
- The balance between cell growth and differentiation in plants is influenced by gene regulatory networks and signal transduction pathways, particularly involving reactive oxygen species (ROS) and transcription factors (TFs).
- In the model organism Arabidopsis thaliana, the MADS-box transcription factor XAANTAL1 (XAL1) plays a crucial role in mediating the effects of hydrogen peroxide (H2O2) on primary root growth and stem cell identity.
- XAL1 enhances H2O2 levels in the root meristem by regulating stress response genes and is key to inhibiting primary root growth through its negative regulation of peroxidase and catalase activities, while also promoting columella stem cell differentiation.
Article Synopsis
- - The study investigates the role of three MADS-box genes in primary root development, which have been less studied compared to their well-documented functions in flowering transition and floral development.
- - Researchers used loss-of-function and overexpression lines to find that two of these genes, critical in flowering, act as repressors of primary root growth, with loss of function leading to increased root growth and improved cell characteristics in a short-root mutant.
- - Additional analyses revealed distinct transcriptional regulation of these genes in roots compared to aerial tissues, identifying 100 differentially expressed genes related to cell differentiation and stress responses, which normalized in the absence of certain gene functions.