[Objective] The aim was to obtain cloning of HDR gene from Ginkgo biloba L. and study its function. [Method] The coding sequence of HDR gene was cloned from Ginkgo biloba L. by reverse transcription polymerase chain reaction,which was designated as GbHDR ( GenBank accession No.: DQ364231). The cDNA full-length of GbHDR is 1 827 bp containing a 1 425-bp open reading frame (ORF) encoding a 474-amino-acid polypeptide and constructed into the prokaryotic expression vector pTrcGbHDR. The β-carotene biosynthetic ...