stem-cells
Stem cells in plants are undifferentiated cells capable of indefinite self-renewal and differentiation into specialized cell types, serving as the foundation for all plant growth and development. In plants, these cells are maintained in specialized regions called meristems, where they drive the continuous production of new tissues and organs throughout a plant's life. Understanding how plant stem cell identity and activity are regulated has broad implications for crop improvement, regenerative agriculture, and fundamental developmental biology.
open_in_new WikipediaPubMed · 2026-04-15
Scientists identified a gene called NUTCRACKER in rice that acts as a master regulator of root stem cells, controlling where and when cells divide near the root tip. Disabling this gene causes chaotic cell division and premature stem cell burnout, revealing a critical checkpoint for healthy root development.
Knockout of the NUTCRACKER gene caused ectopic (out-of-place) cell divisions in the ground tissue and vasculature of rice roots, where divisions normally do not occur.
Loss of NUTCRACKER disrupted the quiescent center — the root's stem cell reservoir — causing premature differentiation of columella stem cells and collapse of the stem cell niche.
NUTCRACKER physically associates with two conserved transcription factors (SHR and SCR) and regulates their downstream targets, demonstrating that a core root-patterning network found in the model plant Arabidopsis is functionally conserved in rice.
