A SCARECROW-based regulatory circuit controls Arabidopsis thaliana meristem size from the root endodermis.

ABSTRACT:

Main conclusion

SCARECROW controls Arabidopsis root meristem size from the root endodermis tissue by regulating the DELLA protein RGA that in turn mediates the regulation of ARR1 levels at the transition zone. Coherent organ growth requires a fine balance between cell division and cell differentiation. Intriguingly, plants continuously develop organs post-embryonically thanks to the activity of meristems that allow growth and environmental plasticity. In Arabidopsis thaliana, continued root growth is assured when division of the distal stem cell and their daughters is balanced with cell differentiation at the meristematic transition zone (TZ). We have previously shown that at the TZ, the cytokinin-dependent transcription factor ARR1 controls the rate of differentiation commitment o

SUBMITTER: Moubayidin L 

PROVIDER: S-EPMC4837209 | biostudies-literature | 2016 May

REPOSITORIES: biostudies-literature