“…Although, a previously isolated root exudate fraction, and here the synthetic strigolactone (GR24), have been shown to induce similar effects on mitochondrial changes (Tamasloukht et al, 2003;Besserer et al, 2006), the results on gene expression are different. The rapid up-regulation of several genes observed in response to root exudates (Tamasloukht et al, 2003(Tamasloukht et al, , 2007 suggests that other, yet unknown, molecules act in synergy or in parallel with strigolactones (Nagahashi and Douds, 2007).…”