Friday, May 29, 2009, 11:00 am — John Dunn Seminar Room, Bldg. 463
Flavonoid compounds play critical roles in lateral root development and legume-rhizobium symbiosis. By metabolic engineering, we were able to alter the flavonoid profiles in transgenic roots. We discovered that flavonoids are essential for legume-rhizobia symbiosis. In soybean, which is a determinate nodulating plant, isoflavones serve as internal nod gene inducers to maintain continuous production of bacterial Nod Factors. In contrast, in Medicago truncatula, which is an indeterminate nodulating plant, flavonoids serve as both internal nod gene inducer and auxin transport regulator. Both functions are essential for successful nodulation. Recently, we identified and characterized a group of auxin- and flavonoid-relate miroRNAs. Their action during nodulation provided additional support that flavonoids and auxin are important early signals for nodule and lateral root primordia development.
Hosted by: Niels van der Lelie
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