Fig. 1

SAPK2 has large effects on plant height and grain number under RDS for 30 days. a Phenotypes analysis of WT and sapk2 mutant lines at mature stage under RDS. b Phenotypes analysis of WT and OE lines at mature stage under RDS. c-f Comparison of agronomic traits including plant height (c), tiller number(d), effective tiller number (e), grain number per plant (f) among WT, sapk2 mutant lines and OE lines under RDS. Data in c-f are shown as means ± SD (n = 20) from three replicates. A student’s t-test was used to generate P values; “**” indicate significance at P < 0.01