Data for: Differentially expressed genes comparing WT plants vs xal1-2

The balance between cell growth, proliferation, and differentiation rates
emerges from gene regulatory networks coupled to various signal
transduction pathways, including reactive oxygen species (ROS) and
transcription factors (FTs), enabling developmental responses to
environmental cues. The Arabidopsis thaliana's primary root has
become a valuable system for unraveling such networks. Recently, the role
of transcription factors mediating ROS's inhibition of primary root
growth has begun to be characterized. This study demonstrates that the
MADS-box transcription factor XAANTAL1 (XAL1) is an essential regulator of
hydrogen peroxide (H2O2) in primary root growth and root stem cell niche
identity. Interestingly, our findings suggest that XAL1 acts as a positive
regulator of H2O2 concentration in the root meristem by directly
regulating genes involved in oxidative stress response, such as PEROXIDASE
28 (PER28). Moreover, we found that XAL1 is necessary for the H2O2-induced
inhibition of primary root growth through the negative regulation of
peroxidase and catalase activities. Furthermore, we found that XAL1, in
conjunction with RETINOBLASTOMA-RELATED (RBR), is essential for positively
regulating the differentiation of columella stem cells in response to
moderate oxidative stress induced by H2O2 treatment.