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Sunflower Metabolites Involved in Resistance Mechanisms against Broomrape

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URI: http://hdl.handle.net/10498/24802

DOI: 10.3390/agronomy11030501

ISSN: 2073-4395

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2021_267.pdf (2.254Mb)
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Author/s
Rial Cumbrera, CarlosAuthority UCA; Varela Montoya, Rosa MaríaAuthority UCA; González Molinillo, José MaríaAuthority UCA; Peralta, Sara; Macías Domínguez, Francisco AntonioAuthority UCA
Date
2021-03
Department
Química Orgánica
Source
Agronomy 2021, 11(3), 501
Abstract
Several strategies have been proposed to control parasitic plants and these include biological control, the use of herbicides, and suicidal germination or trap crops. In the case of sunflower, the most effective solution is genetic resistance. Nevertheless, the use of resistant cultivars is followed by the appearance of new and more virulent races of the parasite that overcome the existing sources of resistance. For this reason, it is necessary to increase our knowledge of the mechanisms involved in the resistant varieties. In this study, the presence of compounds involved in pre-attachment resistance mechanisms in sunflower varieties was analyzed. The production of stimulators of the germination of parasitic plant seeds and the concentration of the haustorial elongation inhibitor, scopoletin, were measured in exudates of resistant and susceptible sunflower varieties. It was found that dehydrocostuslactone and orobanchyl acetate are not involved in the resistance of the sunflower varieties studied. The results demonstrate that costunolide, heliolactone, and scopoletin are related to sunflower resistance. The sunflower varieties studied do not use all available options to fight parasitic plants. This could be one of the reasons that sunflower resistance is rapidly overcome by broomrape.
Subjects
Helianthus annuus; parasitic plants; sesquiterpene lactones; strigolactones; coumarins; liquid chromatography-mass spectrometry
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  • Artículos Científicos [4821]
  • Artículos Científicos INBIO [264]
  • Articulos Científicos Quim. Org. [174]
Atribución 4.0 Internacional
This work is under a Creative Commons License Atribución 4.0 Internacional

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