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Título

Low strigolactone root exudation: A novel mechanism of broomrape (Orobanche and Phelipanche spp.) resistance available for faba bean breeding

AutorFernández-Aparicio, Mónica CSIC ORCID; Kisugi, Takaya; Xie, Xiaonan; Rubiales, Diego CSIC ORCID ; Yoneyama, Koichi
Palabras claveBroomrape
Venetic resistance
Vicia faba
Parasitic plants
Seed germination
Fecha de publicación28-jun-2014
EditorAmerican Chemical Society
CitaciónJournal of agricultural and food chemistry 62(29): 7063- 7071 (2014)
ResumenFaba bean yield is severely constrained in the Mediterranean region and Middle East by the parasitic weeds Orobanche crenata, O. foetida, and Phelipanche aegyptiaca. Seed germination of these weeds is triggered upon recognition of host root exudates. Only recently faba bean accessions have been identified with resistance based in low induction of parasitic seed germination, but the underlying mechanism was not identified. Strigolactones are a group of terpenoid lactones involved in the host recognition by parasitic plants. Our LC-MS/MS analysis of root exudates of the susceptible accession Prothabon detected orobanchol, orobanchyl acetate, and a novel germination stimulant. A time course analysis indicated that their concentration increased with plant age. However, low or undetectable amounts of these germination stimulants were detected in root exudates of the resistant lines Quijote and Navio at all plant ages. A time course analysis of seed germination induced by root exudates of each faba bean accession indicated important differences in the ability to stimulate parasitic germination. Results presented here show that resistance to parasitic weeds based on low strigolactone exudation does exist within faba bean germplasm. Therefore, selection for this trait is feasible in a breeding program. The remarkable fact that low induction of germination is similarly operative against O. crenata, O. foetida, and P. aegyptiaca reinforces the value of this resistance. © 2014 American Chemical Society.
Versión del editorhttp://dx.doi.org/10.1021/jf5027235
URIhttp://hdl.handle.net/10261/127653
DOI10.1021/jf5027235
Identificadoresdoi: 10.1021/jf5027235
issn: 1520-5118
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