Mode d’action des rhizobactéries favorisant la croissance des plantes et potentiel de leur utilisation comme agent de lutte biologique

Beauchamp, Chantal J.

doi:10.7202/706033ar

Cited by 17 publications

(5 citation statements)

References 45 publications

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“…A wide range of Plants Beneficial Rhizospheric Microorganisms (PBRMs) like rhizobacteria, fungi and actinomycetes are beneficial to plants. While associated with plant roots, they promote the growth of the host plant under natural agro-ecosystem through various mechanisms, namely biological nitrogen fixation (Meena et al, 2017;Recous et al, 2017), the solubilization of phosphorus (Gupta et al, 2020;Rawat et al, 2021), potassium (Bahadur et al, 2016;Nath et al, 2017), production of plant growth regulators (Beauchamp, 2005;Ma et al, 2011;Shi et al, 2017). The inoculation of Mucuna pruriens in a controlled conditions (Haro et al, 2020) with a mixed inoculum of Scutellospora sp., Gigaspora sp.…”

Section: Discussionmentioning

confidence: 99%

Effect of nursery substrate on the growth of Pterocarpus erinaceus Poir. seedlings

Pyoabalo¹,

Tchabi²,

Abotsi³

et al. 2021

Int. J. Curr. Res. Biosci. Plant Biol.

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The high pressures on Pterocarpus erinaceus Poir. severely affect its natural stands in West Africa. The measures taken to reverse this trend are still inefficient due to plantlets production constraints. This study aims to understand the importance of growing substrates on seedlings growth in nursery. Composite soil samples were collected at 20 cm depth from 4 seed trees in 5 different sites in Togo (West Africa). Two batches were made for each site, one of which was sterilized by autoclave and the other has received no treatment. Three growing parameters (length of stem, number of buds and number of leaves) of the plantlets obtained from sterilized seeds were measured during 20 weeks in the nursery. Results show for each site a significantly better growing rate of seedlings on unsterilized substrates, compared to sterilized substrates. At the end of the experiment, plantlets were 8.75 ± 2.32 cm mean height on sterilized substrates when they reach 19.20 ± 5.00 cm on unsterilized substrates. The mean number of buds and leaves per plantlet varies from 2.23 ± 1.71 buds and 3.00 ± 1.86 leaves to 10.73 ± 3.28 buds and 11.09 ± 2.48 leaves at the same date, respectively on sterilized and unsterilized substrates. The low growing rate on sterilized substrates should be linked to the low capacity of plantlets in mobilizing phosphorus, potassium and nitrogen without microorganisms. Negative impacts of sterilization were highlighted on seedlings by necrosis of buds and leaves from the 7th week of growth, demonstrating a positive effect of soil microorganisms on the proper development of the seedlings.

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Section: Discussionmentioning

confidence: 99%

Effect of nursery substrate on the growth of Pterocarpus erinaceus Poir. seedlings

Pyoabalo¹,

Tchabi²,

Abotsi³

et al. 2021

Int. J. Curr. Res. Biosci. Plant Biol.

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“…The growing demand for natural alternatives, PGPR as a BCA as it provides plants resilience to the threats of plant pathogens while contributing to the restoration of biodiversity in agroecosystems [24,25]. They indirectly stimulate the growth of plants by their antagonistic effect on the microflora which is harmful to them, by transforming the toxic metabolites, the production of antibiotics or hydrogen cyanide, the competition for nutrients and extracellular enzyme production [26,27]. Some genera are known such as Pseudomonas, Bacillus, Azospirillum, Rhizobium, and Serratia [28].…”

Section: Pgpr As a Biocontrol Agentsmentioning

confidence: 99%

Rhizosphere: Role of bacteria to manage plant diseases and sustainable agriculture—A review

Benaissa

2023

J Basic Microbiol

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General plant diseases as well as soil‐borne pathogens severely reduce agricultural yield. The rhizosphere (the region of the soil that includes and surrounds the roots) is an important niche for microbial diversity in particular phytobeneficial bacteria including plant growth‐promoting rhizobacteria (PGPR) which have been used for a very long time to combat plant diseases. Pathogen control and crop productivity can both be improved through the use of PGPR several mechanisms, including iron‐based nutrition, antibiotics, volatile substances, enzymes, biofilm, allelochemicals, and so on. Their modes of action and molecular mechanisms have improved our comprehension of how they are used to control crop disease. Therefore, there is a lot of literal information available regarding PGPR, but this review stands out since it starts with the fundamentals: the concept of the rhizosphere and the colonization process of the latter, particularly because it covers the most mechanisms. A broad figure is used to present the study's findings. The advantages of using PGPR as bioinoculants in sustainable agriculture are also mentioned.

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“…Una vez establecidas en las raíces de las plantas producen compuestos (fitohormonas y sideroforos) que generan efectos antagonistas contra muchos patógenos de plantas favoreciendo el crecimiento. Hay estudios en los que se ha determinado que las PGPR inducen la promoción de crecimiento de un amplio rango de hospederos (cereales, leguminosas y árboles) por modos de acción directos o indirectos (Beauchamp, 1993;Kapulnik, 1996;Lazarovits y Nowak, 1997).…”

Section: Ramlibacter Sp and Bradyrhizobium Japonicum Modify The Prounclassified

“…Once established in the roots of plants, produce compounds (phytohormones and siderophores) that generate antagonistic effects against many plant pathogens, favoring growth. There are studies in which has been determined that PGPR promote growth of a broad host range (cereals, legumes and trees) through direct or indirect action mode (Beauchamp, 1993;Kapulnik, 1996;Lazarovits and Nowak, 1997).…”

Section: Ramlibacter Sp and Bradyrhizobium Japonicum Modify The Promentioning

confidence: 99%

Aislamiento, caracterización molecular y evaluación de cepas fijadoras de nitrógeno en la promoción del crecimiento de frijol

Angeles-Núñez

Cruz-Acosta

2017

Remexca

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Las leguminosas como el frijol y soya, juegan un papel fundamental en la rotación de los cultivos, gracias al proceso de fijación biológica de nitrógeno atmosférico que se lleva a cabo a través de la interacción simbiótica planta-microorganismo. La búsqueda y obtención de cepas de microorganismos capaces de fijar eficientemente el nitrógeno del suelo y promover el crecimiento de leguminosas de interés agronómico resulta indispensable para afrontar los retos de la agricultura moderna que implica el incremento de productos agrícolas, reduciendo el consumo de energía fósil y la emisión de gases de efecto invernadero generados por la utilización desmedida de fertilizantes nitrogenados. El objetivo de este estudio, fue aislar cepas fijadoras de nitrógeno y promotoras del crecimiento, provenientes de nódulos de Glycine max L. (soya) y Pachyrhizus erosus (jícama) y evaluar sus efectos promotores en el cultivo de Phaseolus vulgaris (frijol). En este trabajo se utilizaron técnicas de biología molecular, fisiología y bioquímica para caracterizar cepas promotoras de crecimiento aisladas de soya y jícama. La identificación molecular indica que las cepas aisladas de soya correspondieron a Ramlibacter sp., (INI26-13), Sinorhizobium sp., (INI43-13), Sinorhizobium fredii (INI51-13), mientras que la cepa aislada de jícama correspondió a Bradyrhizobium japonicum (INI13-13). La capacidad promotora de estos aislados se estudió bajo condiciones de invernadero en plántulas inoculadas de Phaseolus vulgaris (frijol) con una suspensión bacteriana con 108 UFC/ml. Las plántulas fueron cosechadas 18 días después de la inoculación y separadas en vástagos y raíces para su estudio. Los vástagos no presentaron cambios en el peso seco, sin embargo en la raíz se incrementó en el tratamiento con la cepa de Ramlibacter sp. (INI26-13). La presencia de nódulos fue observada en las raíces de todos los tratamientos; sin embargo, fue el tratamiento con la cepa de Ramlibacter sp. (INI26-13) que presentó mayor número de nódulos. El perfildelcontenidodecarbohidratosenraícesfuemodificado diferencialmente en todos los tratamientos y sólo los vástagos del tratamiento con la cepa de Ramlibacter sp. (INI26-13) presentaron incrementos en el contenido de glucosa, fructosa y almidón. Los resultados obtenidos en este trabajo son discutidos en función del papel que tienen los organismos promotores de crecimiento en la agricultura moderna.

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Mode d’action des rhizobactéries favorisant la croissance des plantes et potentiel de leur utilisation comme agent de lutte biologique

Cited by 17 publications

References 45 publications

Effect of nursery substrate on the growth of Pterocarpus erinaceus Poir. seedlings

Effect of nursery substrate on the growth of Pterocarpus erinaceus Poir. seedlings

Rhizosphere: Role of bacteria to manage plant diseases and sustainable agriculture—A review

Aislamiento, caracterización molecular y evaluación de cepas fijadoras de nitrógeno en la promoción del crecimiento de frijol

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