Thomas J. Bürr

Fluid Optimisation in Emergency Laparotomy (FLO-ELA) Trial: study protocol for a multi-centre randomised trial of cardiac output-guided fluid therapy compared to usual care in patients undergoing major emergency gastrointestinal surgery

Mark Edwards, Gordon Forbes, Neil Walker, Dion Morton et autres

INTRODUCTION: Postoperative morbidity and mortality in patients undergoing major emergency gastrointestinal surgery are a major burden on healthcare systems. Optimal management of perioperative intravenous fluids may reduce mortality rates and improve outcomes from surgery. Previous small trials of cardiac-output guided haemodynamic therapy …

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Insight Into the Microbial Co-occurrence and Diversity of 73 Grapevine (Vitis vinifera) Crown Galls Collected Across the Northern Hemisphere

Han Ming Gan, E. Szegedi, R. Fersi, Samir Chebil et autres

Crown gall (CG) is a globally distributed and economically important disease of grapevine and other important crop plants. The causal agent of CG is Agrobacterium or Allorhizobium strains that harbor a tumor-inducing plasmid (pTi). The microbial community within the CG tumor has …

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Flagella and Pili of Xanthomonas axonopodis pv. glycines are associated with motility, biofilm formation and virulence on soybean

Dusit Athinuwat, Siraprapa Brooks, Thomas J. Bürr, S. Prathuangwong

Abstract Targeted mutations in flgK, and pilD genes in strain KU‐P‐SW005 of Xanthomonas axonopodis pv. glycines, the cause of pustule disease on soybean, led to altered motility phenotypes. The flgK mutants lacked a monopolar flagellum and lost swimming motility, whereas the pilD …

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The Ecology of Agrobacterium vitis and Management of Crown Gall Disease in Vineyards

Nemanja Kuzmanović, Joanna Puławska, Lingyun Hao, Thomas J. Bürr

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The Impacts of Tumorigenic and NontumorigenicAgrobacterium vitisStrains on Graft Strength and Growth of Grapevines

Lingyun Hao, David J. Kemmenoe, Didem Canik Orel, Thomas J. Bürr

The effects of tumorigenic and nontumorigenic strains of Agrobacterium vitis on graft strength and growth of grapevines was studied. A procedure was developed for inoculating graft interface surfaces with A. vitis and for measuring the force required to break grafts at different …

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Identifying Environmental Sources of Agrobacterium vitis in Vineyards and Wild Grapevines

Didem Canik Orel, Cheryl L. Reid, Marc Fuchs, Thomas J. Bürr

Agrobacterium vitis, the primary cause of grape crown gall disease, is known to survive internally in grapevines and to spread in propagation material. In this study, we showed that the bacterium can be detected in dormant grape buds and on surfaces of …

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Xylella fastidiosa pil-chp operon is involved in regulating key structural genes of both type I and IV pili

Lingyun Hao, Dusit Athinuwat, Kameka Latoya Johnson, Luciana Cursino et autres

Xylella fastidiosa is the causal agent of Pierce's disease (PD) in grapevines. It has type I and type IV pili, which are both virulence factors involved in the PD-associated processes of motility, aggregation, and biofilm formation. Many questions remain as to how …

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Grape Cultivar and Sap Culture Conditions Affect the Development of Xylella fastidiosa Phenotypes Associated with Pierce's Disease

Lingyun Hao, Paulo A. Zaini, H. C. Hoch, Thomas J. Bürr et autres

Xylella fastidiosa is a xylem-limited bacterium in plant hosts and causes Pierce's disease (PD) of grapevines, which differ in susceptibility according to the Vitis species (spp.). In this work we compared X. fastidiosa biofilm formation and population dynamics when cultured in xylem …

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Characterization of the Xylella fastidiosa PD1311 gene mutant and its suppression of Pierce's disease on grapevines

Lingyun Hao, Kameka Latoya Johnson, Luciana Cursino, Patricia Mowery et autres

Summary Xylella fastidiosa causes Pierce's disease (PD) on grapevines, leading to significant economic losses in grape and wine production. To further our understanding of X. fastidiosa virulence on grapevines, we examined the PD1311 gene, which encodes a putative acyl‐coenzyme A (acyl‐CoA) synthetase, …

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Inhibition of Grape Crown Gall byAgrobacterium vitisF2/5 Requires Two Nonribosomal Peptide Synthetases and One Polyketide Synthase

Desen Zheng, Thomas J. Bürr

Agrobacterium vitis nontumorigenic strain F2/5 is able to inhibit crown gall disease on grapevines. The mechanism of grape tumor inhibition (GTI) by F2/5 has not been fully determined. In this study, we demonstrate that two nonribosomal peptide synthetase (NRPS) genes (F-avi3342 and …

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Distribution ofAgrobacterium vitisin Grapevines and Its Relevance to Pathogen Elimination

Kameka Latoya Johnson, Heather Cronin, Cheryl L. Reid, Thomas J. Bürr

Agrobacterium vitis, the cause of crown gall disease on grapevine, survives internally in vines and can be spread in cuttings for propagation. The possibility of generating pathogen-free vines through tissue culture makes it essential to understand the distribution of the pathogen in …

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Transformation of crown gall resistant and susceptible Vitis genotypes by Agrobacterium vitis

Ed Stover, Thomas J. Bürr, Harry J. Swartz

Transformation of crown gall-susceptible and -resistant Vitis genotypes by Agrobacterium vitis strain CG49 was studied using uidA (GUS) in the p35SGUSINT construct. When greenhouse-grown material propagated through tissue culture was inoculated with CG49(p35SGUSINT) in vitro, the highly crown gall-susceptible V. vinifera Cabernet …