Expression of the six protein-coding genes in Balanophora laxiflora: (A) expression of mitochondrial matR, RPB2 and LFY from male inflorescences; (B) expression of floral B-class genes from different parts of male and female inflorescences. Actin primers were used as an internal control. Abbreviations: inf, inflorescence; tep, tepal; syn, synandrium; pol, pollen; f-br, floral bract; b-br, basal bract; ax, inflorescence axis; f + s, female flowers and spadicles; –, negative control.