SYNTAXIN OF PLANTS132 Regulates Root Meristem Activity and Stem Cell Niche Maintenance via RGF-PLT Pathways.

ABSTRACT: Root growth and development are contingent upon continuous cell division and differentiation in root tips. In this study, we found that the knockdown of the syntaxin gene SYNTAXIN OF PLANTS132 (SYP132) in Arabidopsis thaliana resulted in a significant reduction in root meristem activity and disruption of root stem cell niche (SCN) identity. The SYP132 knockdown mutant exhibits a compromised SCN characterized by an increased number of quiescent center (QC) cells, abnormal columella stem cells (CSCs), reduced meristem size, and subsequent inhibition of root growth. In syp132, vesicle transport of PIN proteins is disrupted, leading to altered auxin distribution and decreased expression of the auxin-response transcription factors PLETHORA 1 (PLT1) and

SUBMITTER: Wang M 

PROVIDER: S-EPMC11900091 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature