Figure 6.

The OsER1-OsMKKK10-OsMKK4-OsMPK6 Pathway Controls DST-OsCKX2 Module-Dependent Regulation of Spikelet Number per Panicle.

(A) Panicle architecture of oser1 mutant and oser1 plants overexpressing DST (oser1/DST^OE) at the reproductive stage. Scale bar, 5 cm.

(B) Panicle architecture of osmkkk10 mutant and osmkkk10 plants overexpressing DST (osmkkk10/DST^OE) at the reproductive stage. Scale bar, 5 cm.

(C) Panicle architecture of oser1 mutant and oser1 plants overexpressing OsCKX2 (oser1/OsCKX2^OE) at the reproductive stage. Scale bar, 5 cm.

(D) Panicle architecture of osmkk4 mutant and osmkk4 plants overexpressing OsCKX2 (osmkk4/OsCKX2^OE) at the reproductive stage. Scale bar, 5 cm.

(E) to (H) Comparisons of average spikelet number per panicle between oser1 mutant and oser1/DST^OE lines (n = 8 plants) (E), osmkkk10 and osmkkk10/DST^OE lines (n = 8 plants) (F), oser1 and oser1/OsCKX2^OE lines (n = 8 plants) (G), and osmkk4 and osmkk4/OsCKX2^OE lines (n = 8 plants) (H).

Values are given as the mean ± sd. **P < 0.01 compared with oser1, osmkkk10, or osmkk4 using Student’s t test.