Apocarotenoid biosynthesis in arbuscular mycorrhizal roots: Contributions from methylerythritol phosphate pathway isogenes and tools for its manipulation

The accumulation of 1-deoxy-d-xylulose 5-phosphate reductoisomerase (DXR) protein involved in apocarotenoid biosynthesis accompanies the degeneration of fungal arbuscules in mycorrhizal roots. The DXR protein is visualized by immunolocalization (green channel) overlaid to the red staining of the fungal structure, which represents a collapsing arbuscule.