Leaf nodule endosymbiotic Burkholderia confer targeted allelopathy to their Psychotria hosts.
Sci Rep
; 11(1): 22465, 2021 11 17.
Article
en En
| MEDLINE
| ID: mdl-34789815
ABSTRACT
After a century of investigations, the function of the obligate betaproteobacterial endosymbionts accommodated in leaf nodules of tropical Rubiaceae remained enigmatic. We report that the α-D-glucose analogue (+)-streptol, systemically supplied by mature Ca. Burkholderia kirkii nodules to their Psychotria hosts, exhibits potent and selective root growth inhibiting activity. We provide compelling evidence that (+)-streptol specifically affects meristematic root cells transitioning to anisotropic elongation by disrupting cell wall organization in a mechanism of action that is distinct from canonical cellulose biosynthesis inhibitors. We observed no inhibitory or cytotoxic effects on organisms other than seed plants, further suggesting (+)-streptol as a bona fide allelochemical. We propose that the suppression of growth of plant competitors is a major driver of the formation and maintenance of the Psychotria-Burkholderia association. In addition to potential agricultural applications as a herbicidal agent, (+)-streptol might also prove useful to dissect plant cell and organ growth processes.
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1
Base de datos:
MEDLINE
Asunto principal:
Feromonas
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Simbiosis
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Extractos Vegetales
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Hojas de la Planta
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Burkholderia
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Ciclohexanoles
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Psychotria
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Alelopatía
Idioma:
En
Revista:
Sci Rep
Año:
2021
Tipo del documento:
Article