1.2.1.94 expressed in Escherichia coli 1.2.1.94 five recombinant His-tagged AaALDH3s, representing AaALDH3-2 and the 4 splice variants of AaALDH3-1, PA, PB, PC, PD, overexpressed in Escherichia coli 1.2.1.94 gene AaALDH3-1, DNA and amino acid sequence determination and analysis, phylogenetic analysis, the enzyme shows tissue and developmental-stage-specific splice variants, four splice variants of AaALDH3-1 (PA, PB, PC and PD), recombinant expression of His-tagged enzyme in Escherichia coli, quantitative real-time PCR enzyme expression analysis 1.2.1.94 gene AaALDH3-2, DNA and amino acid sequence determination and analysis, phylogenetic analysis, the enzyme shows tissue and developmental-stage-specific splice variants 1.2.1.94 gene AaALDH3-2, DNA and amino acid sequence determination and analysis, phylogenetic analysis, the enzyme shows tissue and developmental-stage-specific splice variants, determination of transcript abundance for the AaALDH3 genes quantified by quantitative PCR