OsAt10 overexpression affects rice root architecture while in symbiosis with mycorrhizal fungi.

OÑATE, PA; MONTEOLIVA, MI; BARTLEY, LE

Norman

Jornada; 32nd Annual Undergraduate Research Day; 2020

Oklahoma University

The colonization of a plant´s root system by a fungus is defined as mycorrhizal symbiotic interaction, and such interaction promotes and nutrients and water uptake, improving plant growth. In rice, root colonization shows a specific distribution with a higher frequency in large lateral roots. In response to mycorrhizal colonization rice cell wall composition is altered. For example, Ferulic (FA) and p-Coumaric (p-CA) acids were reduced in colonized roots. FA and p-CA are incorporated into the cell wall by At10 BAHD acyltransferase, among others. We studied root colonization and root system architecture in the overexpressing of OsAt10 rice plants. We analyzed colonization by the magnified intersections method, and architecture root by WinRHIZO software. For the moment, only the root volume was significantly reduced in inoculated wild type with no change in the transgenics, suggesting a role of AT10 regulating root morphology in the interaction with mycorrhizal fungi.