scholarly journals Major exopolysaccharide, EPS I, is associated with the feedback loop in the quorum sensing of Ralstonia solanacearum strain OE1‐1

2019 ◽  
Vol 20 (12) ◽  
pp. 1740-1747 ◽  
Author(s):  
Kazusa Hayashi ◽  
Wakana Senuma ◽  
Kenji Kai ◽  
Akinori Kiba ◽  
Kouhei Ohnishi ◽  
...  
Keyword(s):  
Quorum Sensing ◽  
Ralstonia Solanacearum ◽  
Feedback Loop ◽  
Solanacearum Strain

scholarly journals Contribution of a lectin, LecM, to the quorum sensing signalling pathway of Ralstonia solanacearum strain OE1-1

2018 ◽  
Vol 20 (3) ◽  
pp. 334-345 ◽  
Author(s):  
Kazusa Hayashi ◽  
Kenji Kai ◽  
Yuka Mori ◽  
Shiho Ishikawa ◽  
Yumeto Ujita ◽  
...  
Keyword(s):  
Quorum Sensing ◽  
Ralstonia Solanacearum ◽  
Signalling Pathway ◽  
Solanacearum Strain

scholarly journals Peptide signaling without feedback in signal production operates as a true quorum sensing communication system in Bacillus subtilis

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Iztok Dogsa ◽  
Mihael Spacapan ◽  
Anna Dragoš ◽  
Tjaša Danevčič ◽  
Žiga Pandur ◽  
...  
Keyword(s):  
Gene Expression ◽  
Bacillus Subtilis ◽  
Quorum Sensing ◽  
Cell Density ◽  
Communication System ◽  
Communication Systems ◽  
Feedback Loop ◽  
Signal Molecules ◽  
Specific Cell ◽  
Sharp Transition

AbstractBacterial quorum sensing (QS) is based on signal molecules (SM), which increase in concentration with cell density. At critical SM concentration, a variety of adaptive genes sharply change their expression from basic level to maximum level. In general, this sharp transition, a hallmark of true QS, requires an SM dependent positive feedback loop, where SM enhances its own production. Some communication systems, like the peptide SM-based ComQXPA communication system of Bacillus subtilis, do not have this feedback loop and we do not understand how and if the sharp transition in gene expression is achieved. Based on experiments and mathematical modeling, we observed that the SM peptide ComX encodes the information about cell density, specific cell growth rate, and even oxygen concentration, which ensure power-law increase in SM production. This enables together with the cooperative response to SM (ComX) a sharp transition in gene expression level and this without the SM dependent feedback loop. Due to its ultra-sensitive nature, the ComQXPA can operate at SM concentrations that are 100–1000 times lower than typically found in other QS systems, thereby substantially reducing the total metabolic cost of otherwise expensive ComX peptide.

Disproof of the Proposed Structures of Bradyoxetin, a Putative Bradyrhizobium japonicum Signaling Molecule, and HMCP, a Putative Ralstonia solanacearum Quorum-Sensing Molecule

2021 ◽  
Vol 84 (2) ◽  
pp. 495-502
Author(s):  
Arata Yajima ◽  
Ryo Katsuta ◽  
Mikaho Shimura ◽  
Ayaka Yoshihara ◽  
Tatsuo Saito ◽  
...  
Keyword(s):  
Quorum Sensing ◽  
Ralstonia Solanacearum ◽  
Bradyrhizobium Japonicum ◽  
Signaling Molecule ◽  
Quorum Sensing Molecule

Distribution and multiplication of Ralstonia solanacearum strain race 1 biovar 4 in vegetable sweet potato cuttings

2019 ◽  
Vol 168 (1) ◽  
pp. 36-46
Author(s):  
Yi‐Jeng Chen ◽  
Yi‐Sheng Lin ◽  
Hui‐Ru Pan ◽  
Wen‐Hsin Chung
Keyword(s):  
Sweet Potato ◽  
Ralstonia Solanacearum ◽  
Solanacearum Strain ◽  
Race 1

scholarly journals Evaluación del gen que codifica la enzima βHPMEH para la inhibición de la marchitez bacteriana causada por Ralstonia solanacearum

2015 ◽  
Vol 22 (2) ◽  
pp. 193
Author(s):  
Elizabeth Fernandez ◽  
Liliam Gutarra ◽  
Jan Kreuze
Keyword(s):  
Quorum Sensing ◽  
Ralstonia Solanacearum

La marchitez bacteriana causada por Ralstonia solanacearum E.F. Smith es una de las enfermedades bacterianas más importantes que ataca a cultivos agrícolas como papa, tomate, banana, entre otros, causando grandes pérdidas en la producción. Desafortunadamente, su control ha sido difícil por su amplio rango de hospederos alternativos, su supervivencia en el suelo y su variación biológica y genética; así como porque no hay variedades con altos niveles de resistencia y porque no existe un control químico efectivo. Quorum sensing (percepción de quorum) es el fenómeno mediante el cual la acumulación de unas moléculas permite a una bacteria saber el número de bacterias que se encuentran en el medio es decir la densidad poblacional. La bacteria R. solanacearum posee un sistema quorum sensing para la regulación de la expresión de genes de virulencia, y en la cual la molécula 3-OH-PAME es el autoregulador de esta señal. Se conoce que la molécula ΒHPMEH hidroliza a 3-OH-PAME, anulando así la señal de autorregulación y por tanto la comunicación quorum sensing en R. solanacearum. Con el objetivo de evaluar el gen βhpmeh, se diseñaron dos vectores que expresen este gen bajo el control de dos diferentes promotores, los cuales fueron verificados por análisis de restricción, secuenciamiento y posteriormente mediante técnicas de agroinfiltración, se observó su expresión y su efecto frente a R. solanacearum en hojas de papa de la variedad Desiree. Los resultados de la expresión transitoria, muestran que el gen βhpmeh retrasó la aparición de síntomas de la marchitez bacteriana y sería un candidato potencial para transformación genética de la planta entera.

scholarly journals An Avirulent Ralstonia Solanacearum Strain Undergoes Phenotype Conversion from a Pathogenic Strain Under Natural Environment

2020 ◽  
Vol 8 (3) ◽  
pp. 46
Author(s):  
Deju Chen ◽  
Haifeng Zhang ◽  
Yanli Li ◽  
Yanpin Chen ◽  
Xuefang Zheng ◽  
...  
Keyword(s):  
Natural Environment ◽  
Ralstonia Solanacearum ◽  
Pathogenic Strain ◽  
Solanacearum Strain

Quorum Sensing Inhibition Attenuates the Virulence of the Plant Pathogen Ralstonia solanacearum Species Complex

2020 ◽  
Vol 15 (11) ◽  
pp. 3050-3059
Author(s):  
Ayaka Yoshihara ◽  
Mika Shimatani ◽  
Megumi Sakata ◽  
Chika Takemura ◽  
Wakana Senuma ◽  
...  
Keyword(s):  
Quorum Sensing ◽  
Plant Pathogen ◽  
Ralstonia Solanacearum ◽  
Species Complex ◽  
Quorum Sensing Inhibition

scholarly journals Complete Genome Sequence of the Plant Pathogen Ralstonia solanacearum Strain CIAT-078, Isolated in Colombia, Obtained Using Oxford Nanopore Technology

2020 ◽  
Vol 9 (22) ◽  
Author(s):  
Diana López-Alvarez ◽  
Ana M. Leiva ◽  
Israel Barrantes ◽  
Juan M. Pardo ◽  
Viviana Dominguez ◽  
...  
Keyword(s):  
Genome Sequence ◽  
Plant Pathogen ◽  
Ralstonia Solanacearum ◽  
Complete Genome Sequence ◽  
Complete Genome ◽  
Causal Agent ◽  
Content Type ◽  
Solanacearum Strain ◽  
Oxford Nanopore

ABSTRACT Moko is one of the main diseases affecting banana and plantain in Colombia. Here, we report the genome sequence of the causal agent, the bacterium Ralstonia solanacearum (Smith) strain CIAT-078, collected in 2004 from affected plantains in central-west Colombia. The assembled genome was obtained using Oxford Nanopore Technology.

Sign in / Sign up

Export Citation Format

Share Document