Nodulation-gene-inducing flavonoids increase overall production of autoinducers and expression of N-acyl homoserine lactone synthesis genes in rhizobia
|Author/s||Pérez Montaño, Francisco de Asís
Guasch Vidal, Beatriz
González Barroso, Sergio
López Baena, Francisco Javier
Cubo Sánchez, María Teresa
Ollero Márquez, Francisco Javier
Gil Serrano, Antonio Miguel
Rodríguez Carvajal, Miguel Ángel
Bellogín Izquierdo, Ramón Andrés
Espuny Gómez, María del Rosario
|Department||Universidad de Sevilla. Departamento de Microbiología
Universidad de Sevilla. Departamento de Química Orgánica
|Abstract||Legume-nodulating rhizobia use N-acyl homoserine lactones (AHLs) to regulate several physiological traits related to the symbiotic plant–microbe interaction. In this work, we show that Sinorhizobium fredii SMH12, Rhizobium ...
Legume-nodulating rhizobia use N-acyl homoserine lactones (AHLs) to regulate several physiological traits related to the symbiotic plant–microbe interaction. In this work, we show that Sinorhizobium fredii SMH12, Rhizobium etli ISP42 and Rhizobium sullae IS123, three rhizobial strains with different nodulation ranges, produced a similar pattern of AHL molecules, sharing, in all cases, production of N-octanoyl homoserine lactone and its 3-oxo and/or 3-hydroxy derivatives. Interestingly, production of AHLs was enhanced when these three rhizobia were grown in the presence of their respective nod-gene-inducing flavonoid, while a new molecule, C14-HSL, was produced by S. fredii SMH12 upon genistein induction. In addition, expression of AHL synthesis genes traI from S. fredii SMH12 and cinI and raiI from R. etli ISP42 increased when induced with flavonoids, as demonstrated by qRT-PCR analysis.