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Sci Rep

Title:		Leaf nodule endosymbiotic Burkholderia confer targeted allelopathy to their Psychotria hosts
Author(s):		Georgiou A; Sieber S; Hsiao CC; Grayfer T; Gorenflos Lopez JL; Gademann K; Eberl L; Bailly A;
Address:		"Institute of Plant and Microbial Biology, University of Zurich, Zollikerstrasse 107, 8008, Zurich, Switzerland. Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland. Institute of Plant and Microbial Biology, University of Zurich, Zollikerstrasse 107, 8008, Zurich, Switzerland. leberl@botinst.uzh.ch. Institute of Plant and Microbial Biology, University of Zurich, Zollikerstrasse 107, 8008, Zurich, Switzerland. aurelien.bailly@botinst.uzh.ch"
Journal Title:		Sci Rep
Year:		2021
Volume:		20211117
Issue:		1
Page Number:		22465 -
DOI:		10.1038/s41598-021-01867-2
ISSN/ISBN:		2045-2322 (Electronic) 2045-2322 (Linking)
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 alpha-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"
Keywords:		Allelopathy/*physiology Arabidopsis/drug effects/growth & development Burkholderia/*metabolism Cyclohexanols/*pharmacology Germination/drug effects Lettuce/drug effects/growth & development Meristem/drug effects/growth & development Mustard Plant/drug eff;
Notes:		"MedlineGeorgiou, Antri Sieber, Simon Hsiao, Chien-Chi Grayfer, Tatyana Gorenflos Lopez, Jacob L Gademann, Karl Eberl, Leo Bailly, Aurelien eng Sinergia grant CRSII3_154430/Schweizerischer Nationalfonds zur Forderung der Wissenschaftlichen Forschung/ Research Support, Non-U.S. Gov't England 2021/11/19 Sci Rep. 2021 Nov 17; 11(1):22465. doi: 10.1038/s41598-021-01867-2"