Amplified fragments for poplar transformation	Primer
PtABA3 promoter	Forward: GGG GAC AAG TTT GTA CAA AAA AGC AGG CTT ATA TGC CTC TGT ACA TCG TGT G
PtABA3 promoter	Reverse: GGG GAC CAC TTT GTA CAA GAA AGC TGG GTC ATG TTC TTT TTG GCT CTT CTT
PtAO2 promoter outer primer for nested PCR	Forward: GGA AGT CAA TTG GCT GTT GAC ATT
PtAO2 promoter outer primer for nested PCR	Reverse: CTG TGT TTT TTG TGT CTG CGT CAG
PtAO2 promoter inner primer for nested PCR	Forward: AAC CCA TCC AAC TTG ATG GCC ACC
PtAO2 promoter inner primer for nested PCR	Reverse: TTG GAT CCA CAG CGA GCG CAT AAG AAG CTG GC
ABA3-RNAi with intron	Forward: TTG GAT CCT CGA GTT CCT GAC ATG TGC TCT ATT AGT
ABA3-RNAi with intron	Reverse: TTC CAT GGA ATT CAA TCT GTT GTT GAG GTC GGA CAC
ABA3-RNAi fusion PCR	Forward: ACT GAT TTT GAA GAG AAT GAT GTC GAC TTG TGG
ABA3-RNAi fusion PCR	Reverse: GAC ATC ATT CTC TTC AAA ATC AGT ATT ACC ATA CC
AO-RNAi	Forward: AAG GAT CCT CGA GTG CCT GTT GTG CAT GAA G
AO-RNAi	Reverse: AAC CAT GGA ATT CAA GTC AGG GAC AAA GAA AG
GFP-ABA3	Forward: TTT CTT GGA TCC ATG GAA GCA TTT CTT AAG GAA TTC Reverse: CAC AAG CGG ATC CTT ATT CAA TAT CTG GAT TAA CTT CTT CCC C