cDNA cloning,difference expression in various organs,and bioinformatic analysis of HMGS gene in Sambucus chinensis Screening of reference genes in Siraitia grosvenorii and spatio-temporal expression analysis of 3-hydroxy-3-methylglutaryl coenzyme A Triterpene biosynthesis in Euphorbia pekinensis induced by methyl jasmonate Molecular cloning, differential expression, and bioinformatics analysis of HMGR gene in Sambucus chinensis