Abstract
Root parasitic plants and arbuscular mycorrhizal fungi receive strigolactones as host recognition signals in the rhizosphere. In host plants, strigolactones play a key role in shoot branching. Several lines of genetic evidence have illustrated that strigolactones are derived from the carotenoid pathway in plants. However, the biosynthesis pathway of strigolactones has not yet been fully elucidated. Establishment of their biosynthesis pathway and subsequent studies on regulation of their biosynthesis will provide important clues to control their physiological functions. To better understand the biosynthesis of strigolactones in plants, we investigated the occurrence of strigolactones and regulation of their biosynthesis in plant cultured cell lines provided from RIKEN BioResource Center. Then, feeding experiments using the plant cell cultures with deuterium-labeled strigolactones was carried out to unveil the biosynthesis pathways of strigolactones.
