“…In plants, like many other enzymes of the MVA pathway, is encoded by small gene families. A single SQS gene has been reported in many plants, such as Taxus cuspidata ( Huang et al, 2007 ), Euphorbia tirucalli ( Uchida et al, 2009 ), Oryza sativa ( Hata et al, 1997 ), Lotus japonicus ( Akamine et al, 2003 ), Chlorophytum borivilianum ( Kalra et al, 2013 ), and E. pekinensis ( Zheng et al, 2013 ), while it has been found that there are two SQS genes in Arabidopsis thaliana ( Kribii et al, 1997 ), tobacco ( Devarenne et al, 1998 ), Glycyrrhiza glabra ( Hayashi et al, 1999 ), Withania somnifera ( Gupta et al, 2012 ), Glycine max ( Nguyen et al, 2013 ), and Salvia miltiorrhiza Bunge ( Ma et al, 2014 ), and three SQS genes in Panax ginseng ( Kim et al, 2011 ).…”