Symbioses: Plant, Animal, and Microbe Interactions
Wang, Bin , Qiu, Yin-Long .
Origin of Mycorrhizae in Land Plants: Molecular Evidence from DMI3, a Gene Controlling Mycorrhizal Development.
Intimate associations between mycorrhizal fungi and plants occur throughout land plants. However, it is still debatable whether such fungal associations in vascular plants and bryophytes are evolutionarily homologous. Hence, the origin of mycorrhizae and their role in facilitating coloniozation of land by plants remain uncertain. Here we report presence of DMI3, a gene controlling mycorrhiza development in legumes, in many bryophytes and vascular plants. Our phylogenetic analyses indicate that the gene has been vertically inherited. These data suggest that the earliest land plants had possessed the genetic machinery to direct mycorrhizal development, and that mycorrhizae likely played an important role in the origin of land plants.
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1 - University of Michigan, Department of Ecology & Evolutionary Biology, 830 North University Avenue, Ann Arbor, Michigan, 48109-1048, USA
Presentation Type: Oral Paper:Papers for Topics
Location: Continental B/Hilton
Date: Wednesday, July 11th, 2007
Time: 1:30 PM