Publications by authors named "Jesus T Peng"
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.
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.
Over recent years, our understanding of the tricarboxylic acid cycle (TCAC) in living organisms has expanded beyond its canonical role in cellular energy production. In plants, TCAC metabolites and related enzymes have important roles in physiology, including vacuolar function, chelation of metals and nutrients, photorespiration, and redox regulation. Research in other organisms, including animals, has demonstrated unexpected functions of the TCAC metabolites in a number of biological processes, including signaling, epigenetic regulation, and cell differentiation.
View Article and Find Full Text PDFUnderstanding how plants grow is critical for agriculture and fundamental for illuminating principles of multicellular development. Here, we apply desorption electrospray ionization mass spectrometry imaging (DESI-MSI) to the chemical mapping of the developing maize root. This technique reveals a range of small molecule distribution patterns across the gradient of stem cell differentiation in the root.
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