All 13 SlGRFs were analyzed comprehensively in tomato.
STTM396a/396a-88 effectively down-regulated miR396a and miR396b in tomato.
Destruction of miR396 decreased the size and cell size of tomato cotyledon.
Blockage of miR396 significantly increased the size and cell size of tomato sepal.
Degradation of miR396 obviously elevated weight and cell size of tomato fruit.