title: Modulation of root branching by a coumarin derivative.
abstract: A healthy root system is crucial to plant growth and survival. To maintain efficiency of root function, plants have to dynamically modulate root system architecture through various adaptive mechanisms such as lateral root formation to respond to a changing and diversified soil environment. Exogenous application of a coumarin derivative, 4-methylumbelliferone (4-MU), in Arabidopsis thaliana inhibits seed germination by mainly reducing primary root growth. UDP-glycosyltransferases play an integral role in the biochemical mechanism of 4-MU detoxiﬁcation in plant roots.1 However, 4-MU treatment also dramatically led to increased lateral root initiation, elongation and density. Moreover, marked root bending at the root-hypocotyl junction and auxin redistribution appeared to contribute to the 4-MU-mediated lateral root formation. We propose that 4-MU would serve as a useful chemical tool to study auxin-mediated root branching.
authors: Agriculture and Agri-Food Canada, Saskatoon Research Centre, Saskatoon, Canada.
authors: Xiang
authors: X
authors: Li
authors: Ming-Jun
authors: MJ
authors: Gao
mesh_terms: D017360:Arabidopsis / Q000187:drug effects* / Q000254:growth & development; D018525:Germination / Q000187:drug effects; D006923:Hymecromone / Q000031:analogs & derivatives* / Q000494:pharmacology; D007210:Indoleacetic Acids / Q000378:metabolism; D018517:Plant Roots / Q000187:drug effects* / Q000254:growth & development; D012639:Seeds / Q000187:drug effects
chemical_list: D007210:Indoleacetic Acids; D006923:Hymecromone