Cytokinin Sensing in Bacteria

Kabbara, Samar; Bidon, Baptiste; Kilani, Jaafar; Osman, Marwan; Hamzé, Monzer; Stock, Ann; Papon, Nicolas

doi:10.3390/biom10020186

Cited by 9 publications

(6 citation statements)

References 25 publications

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“…Es bien conocido que las citoquininas son compuestos que al ser liberados por las bacterias en la rizosfera pueden inf luenciar el crecimiento de las plantas que crecen a su alrededor (Kabbara et al, 2020). Las citoquininas presentan efectos sobre la dominancia apical, la división celular, el crecimiento de las raíces, la señalización nutricional, la senescencia de tejidos y las interacciones entre plantas y patógenos (Lira-Saldívar, 2014; Rivero, Medina y Zavaleta, 2016; Gupta, Leibman, Pizarro y Bar, 2021).…”

Section: Resultados Y Discusión Hormonasunclassified

Inducción de la producción de minitubérculos mediante inoculación con rizobacterias en plantas de ñame (Dioscorea rotundata Poir)

Sánchez-López

Castellanos²,

Coronado³

et al. 2022

Terra Latinoam

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El cultivo del ñame es de alta importancia para la seguridad alimentaria de las familias rurales en la región Caribe de Colombia. Uno de los principales problemas tecnológicos que enfrentan los pequeños productores es la baja calidad y disponibilidad de la semilla para las siembras. El presente trabajo se realizó con el objeto de evaluar la tecnología de producción de minitubérculos en plántulas de ñame generadas a partir de esquejes, mediante inducción con rizobacterias. Para ello, inicialmente se evaluó in vitro la capacidad de producción de f itohormonas de tres rizobacterias, identif icadas con los códigos DCR11 (Azotobacter vinelandii), DSC21 (Brevibacillus laterosporus) y DSC1 (Bacillus licheniformis), y una vez comprobada su capacidad, se estableció un experimento bajo condiciones de casa de malla para inducir, con las rizobacterias, la producción de minitubérculos en las plántulas de ñame, bajo tres niveles de sombreamiento. Se utilizó un diseño experimental completamente al azar con arreglo en parcelas subdivididas y tres repeticiones, en donde la parcela principal correspondió a los niveles de sobreamiento (0, 65 y 80%), las subparcelas a las tres rizobacterias (DCR11 A. vinelandii, DSC1 B. licheniformis, DSC21 B. laterosporus) y las sub-subparcelas a las dosis del inóculo (0, 2, 4 y 6 mL pl-1). Los resultados in vitro demostraron el potencial de las rizobacterias para producir citoquinas y auxinas. En casa de malla se logró evidenciar la capacidad de producción de minitubérculos por parte de las plántulas de ñame, en donde las rizobacterias DSC1 B. licheniformis y DSC21 B. laterosporus mostraron mayor capacidad de inducción. A partir de los resultados se demostró la viabilidad de producción de minitubérculos en plántulas de ñame bajo condiciones de casa de malla mediante inducción con rizobacterias, por lo que se recomendó su validación a nivel semicomercial como estrategia para la producción masiva de minitubérculos de ñame, como alternativa para la siembra de cultivos comerciales.

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Section: Resultados Y Discusión Hormonasunclassified

Inducción de la producción de minitubérculos mediante inoculación con rizobacterias en plantas de ñame (Dioscorea rotundata Poir)

Sánchez-López

Castellanos²,

Coronado³

et al. 2022

Terra Latinoam

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“…Cytokinins are known to act as signaling molecules by modulating gene regulatory networks. They are also involved in metabolic processes, differentiation, and secondary metabolite production [32]. Phytohormone active forms, namely zeatin and isopentyladenine, as well as less active zeatin-riboside and isopentenyladenosine, were quantified in the S. netropsis IMV Ac-5025 biomass grown in synthetic nutrient medium supplemented with exogenous β-sitosterol.…”

Section: Biosynthesis Of Cytokininsmentioning

confidence: 99%

Natural Products Biosynthesis by Streptomyces netropsis IMV Ac-5025 under Exogenous Sterol Action

Loboda,

Biliavska,

Iutynska

et al. 2024

Antibiotics

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Streptomycetes are known as producers of bioactive substances, particularly antibiotics. Streptomyces netropsis IMV Ac-5025 simultaneously produces different classes of antibiotics, including polyene compounds, phytohormones, and sterols, but the metabolic pathways involved in their biosynthesis are largely understudied. The aim of this work was to explore the biosynthesis of polyene antibiotics, sterols, and phytohormones when the producer is cultivated in a nutrient medium supplemented with exogenous β-sitosterol. Gas chromatography and high-performance liquid chromatography were applied to analyze the spectrum of bioactive compounds. The obtained results demonstrated not only an increase in the accumulation of biomass but also polyene antibiotics, intracellular sterols, auxins, and cytokinins, when cultivating S. netropsis IMV Ac-5025 in a liquid medium with the addition of β-sitosterol. The amount of biomass raised 1.5–2-fold, whilst the sum of polyene antibiotics increased 4.5-fold, sterols’ sum (ergosterol, cholesterol, stigmasterol, β-sitosterol, and 24-epibrassinolide) by 2.9-fold, auxins’ sum (indole-3-acetic acid, indole-3-acetic acid hydrazide, indole-3-carbinol, indole-3-butyric acid, indole-3-carboxaldehyde, and indole-3-carboxylic acid) by 6-fold, and cytokinins’ sum (zeatin, isopentyladenine, zeatin riboside, and isopentenyladenosine) by 11-fold. Thus, we put forward the hypothesis that β-sitosterol plays a regulatory role in the network of biosynthetic reactions of S. netropsis IMV Ac-5025.

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“…An increasing amount of genomic data suggests that CK and ET receptors have evolved and diversified throughout the prokaryotic domain. For instance, potential CK receptor homologs with CHASE domains are found in various plant pathogenic and symbiotic bacteria ( Figure 2 D) [ 27 ]. Similarly, many species of proteobacteria and cyanobacteria possess genes that are predicted to encode proteins with an ETBD [ 28 ].…”

Section: Ck and Et Signaling In Bacteriamentioning

confidence: 99%

Cytokinin and Ethylene Cell Signaling Pathways from Prokaryotes to Eukaryotes

Bidon

Kabbara

Courdavault³

et al. 2020

Cells

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Cytokinins (CKs) and ethylene (ET) are among the most ancient organic chemicals on Earth. A wide range of organisms including plants, algae, fungi, amoebae, and bacteria use these substances as signaling molecules to regulate cellular processes. Because of their ancestral origin and ubiquitous occurrence, CKs and ET are also considered to be ideal molecules for inter-kingdom communication. Their signal transduction pathways were first historically deciphered in plants and are related to the two-component systems, using histidine kinases as primary sensors. Paradoxically, although CKs and ET serve as signaling molecules in different kingdoms, it has been supposed for a long time that the canonical CK and ET signaling pathways are restricted to terrestrial plants. These considerations have now been called into question following the identification over recent years of genes encoding CK and ET receptor homologs in many other lineages within the tree of life. These advances shed new light on the dissemination and evolution of these hormones as both intra- and inter-specific communication molecules in prokaryotic and eukaryotic organisms.

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Cytokinin Sensing in Bacteria

Cited by 9 publications

References 25 publications

Inducción de la producción de minitubérculos mediante inoculación con rizobacterias en plantas de ñame (Dioscorea rotundata Poir)

Inducción de la producción de minitubérculos mediante inoculación con rizobacterias en plantas de ñame (Dioscorea rotundata Poir)

Natural Products Biosynthesis by Streptomyces netropsis IMV Ac-5025 under Exogenous Sterol Action

Cytokinin and Ethylene Cell Signaling Pathways from Prokaryotes to Eukaryotes

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