期刊
PLANT SIGNALING & BEHAVIOR
卷 6, 期 11, 页码 1654-1655出版社
TAYLOR & FRANCIS INC
DOI: 10.4161/psb.6.11.17768
关键词
coumarin; 4-methylumbelliferone; auxin; lateral root; root branching
资金
- Agriculture and Agri-Food Canada Canadian Crop Genomics Initiative
- Program for New Century Excellent Talents in University, Ministry of Education of the People's Republic of China
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 detoxication 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.
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