Figure 1.

PAR1 Inhibits Cell Elongation.

(A) PAR1-overexpressing transgenic plants (PAR1OX) show dwarfism. Plants were grown for 4 weeks in long-day conditions.

(B) Immunoblot analysis of PAR1–myc levels in the PAR1OX plants shown in panel (A).

(C) PAR1OX seedlings exhibit short hypocotyls and dark-green cotyledons compared to wild-type (Col-0). Seedlings were grown for 5 d under white light.

(D) Hypocotyl cells of PAR1OX are shorter than those of wild-type (Col-0). Hypocotyls were stained with propidium iodide and examined by confocal microscopy. Bar = 25 μm.