ABA guides stomatal proliferation and patterning through the EPF-SPCH signaling pathway in Arabidopsis thaliana.

Adaptation to dehydration stress requires plants to coordinate environmental and endogenous signals to inhibit stomatal proliferation and modulate their patterning. The stress hormone abscisic acid (ABA) induces stomatal closure and restricts stomatal lineage to promote stress tolerance. Here, we report that mutants with reduced ABA levels, xer-1, xer-2 and aba2-2, developed stomatal clusters.

CBF4/DREB1D represses XERICO to attenuate ABA, osmotic and drought stress responses in Arabidopsis.

Water stress can severely impact plant growth, productivity and yield. Consequently, plants have evolved various strategies through which they can respond and adapt to their environment. XERICO (XER) is a stress-responsive RING E3 ubiquitin ligase that modulates abscisic acid (ABA) levels and promotes drought tolerance when overexpressed.

Spatiotemporal Restriction of Expression by Class I BPCs Promotes Ovule Development and Coordinates Embryo and Endosperm Growth.

Spatiotemporal regulation of gene expression is critical for proper developmental timing in plants and animals. The transcription factor regulates developmental phase transitions by acting as a link between hormonal pathways in Arabidopsis (). However, the mechanisms governing its spatiotemporal expression pattern are poorly understood.