Fig. 2

SAPK2 has large effects on grain size and weight under RDS for 30 days. a Panicle and grain phenotypes of WT, sapk2 mutant lines and OE lines under RDS. b-f Comparison of agronomic traits including grain number per panicle(b), setting rate (c), grain length (d), grain width (e), 1000-grain weight (f), grain yield per plant (g) among WT, sapk2 mutant lines and OE lines under RDS. Data in (b-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