Figure 7

Alkaloid contents determination and expression analysis of key alkaloid biosynthetic genes in two different dendrobium species. (a) The alkaloid contents were measured in four organs of two different dendrobium species (D. nobile L. and D. officinale L.). The significantly changes in polysaccharide contents between D. nobile L. and D. officinale L. were indicated by “*”. (b) The related expression levels of seven D. nobile L. highly expressed genes. The significantly changes in expression levels of polysaccharide genes between D. nobile L. and D. officinale L. were indicated by “*”.