Rhizobia Promote Rice (Oryza sativa L.) Growth: First Evidence in Cuba

Forte, Ionel Hernández; Garcia, Magalı́

doi:10.1007/978-3-030-17597-9_10

Cited by 7 publications

(2 citation statements)

References 34 publications

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“…Investigaciones previas demostraron que algunas cepas de las que se emplearon en la presente investigación, como Rpr11 y Rpr2, producen compuestos indólicos del tipo AIA (Hernández Forte & Nápoles García, 2019). La producción de estos compuestos podría haber influido en la germinación de las semillas de ambos cultivares de cafeto.…”

Section: Discussionunclassified

Los rizobios incrementan la germinación de las semillas de Coffea arabica y Coffea canephora. Segunda evidencia en Cuba

et al. 2021

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Introducción. La lenta y asincrónica germinación de las semillas de café afecta la obtención de plántulas e incrementa los gastos asociados a la producción. La aplicación de rizobacterias promotoras del crecimiento vegetal (PGPRs) ha mostrado ser una alternativa ante esta problemática. Objetivo. Evaluar el efecto de la inoculación de rizobios en la germinación de dos cultivares de cafeto en condiciones controladas y productivas. Materiales y métodos. Durante enero y febrero del 2020, se desarrollaron dos experimentos en la Universidad de Oriente, Cuba, en el que se emplearon diez cepas de rizobios, provenientes de leguminosas y gramíneas, y dos cultivares de cafeto de importancia económica en Cuba: Coffea arabica cultivar (cv.) Isla 5-15 y Coffea canephora Pierre ex Froehner cultivar (cv.) Robusta. Los experimentos se realizaron uno en condiciones controladas, donde la germinación de las semillas se evaluó en placas Petri y otro donde se emplearon canteros pregerminadores. En ambos experimentos se empleó un diseño completamente aleatorizado y se realizó un análisis de varianza. Resultados. En condiciones controladas, la inoculación de las cepas Rpr11, Rpr2, 1-2, ICA8001 y Can3, incrementaron el porcentaje de germinación, la energía germinativa, el índice de germinación, el índice de velocidad de germinación y el índice de vigor. En los canteros pregerminadores, los inoculantes a base de las cepas Rpr2 y Rpr11 produjeron los mayores porcentajes de emergencia y de energía de germinación. Conclusión. Las cepas Rpr2 y Rpr11 de Rhizobium, incrementaron la germinación de las semillas de dos variedades de cafeto.

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Section: Discussionunclassified

Los rizobios incrementan la germinación de las semillas de Coffea arabica y Coffea canephora. Segunda evidencia en Cuba

et al. 2021

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“…Previously, it was demonstrated that Rhizobium sp. The Rpr2 strain produces hormones such as indol-acetic acid, which increase the growth of the root system by increasing the size, weight, number of branches and surface area in contact with the soil [28,40]. Then, the inoculation of this bacteria could explain the decrease in P content in the substrate shown in the inoculated treatments (Table 4).…”

Section: Discussionmentioning

confidence: 99%

Rhizobium Grants the Reduction of Phosphate Fertilization during the Production of Coffee Seedlings

Vinent

Aguilera

et al. 2023

Sustainability

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The use of bacterial inoculants is an attractive alternative that could reduce the consumption of chemical fertilizers in crops. In the production system of quality coffee seedlings, it is essential to achieve an adequate balance of nutrients that allows for healthy plants that are resistant to subsequent handling. The objective of this work was to evaluate the effect of Rhizobium sp. inoculation on the growth, nutrition and quality of coffee seedlings cultivated with different doses of phosphoric fertilization. Inoculation tests were carried out under nursery conditions using Coffea arabica L. cv. “Isla 5–15” and Coffea canephora Pierre ex Froehner cv. “Robusta” seeds inoculated with the Rhizobium sp. Rpr2 strain. Sixty days after sowing, the hypocotyldonal graft was performed, and the resulting plants were also treated with the bacterial inoculant. Plants were then planted in substrate with different doses of phosphorus (P): 25, 50, 75 and 100%. At seven months of cultivation, variables of growth (plant height, stem diameter, number of leaf pairs, main root length, root volume, dry mass of the aerial part, root and total), phosphoric nutrition (leaf and root P contents) and posture quality index were evaluated. The inoculation stimulated the aerial part (37%), root growth (34%), the quality index of the grafted postures (30%), and phosphorus absorption (42%) and allowed a decrease from 25 to 75% of the mineral fertilizer. For the first time in Cuba, the benefits of rhizobial inoculation on the nutrition and quality of coffee seedlings were demonstrated. The inoculation of grafted coffee seedlings with Rhizobium sp. Rpr2 through the inoculation method proposed in this study can be recommended as a new easy, cost-effective and efficient inoculation approach to obtain additional benefits for coffee growth, improving the absorption of nutritive elements and the quality characteristics of the coffee seedlings.

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Bioprospecting plant growth‐promoting rhizobacteria from rice genotypes and their influence on growth under aerobic conditions

et al. 2021

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The bacteria that colonize plant roots and enhance plant growth by various mechanisms are known as plant growth-promoting rhizobacteria (PGPR). The functions of rhizobacteria stand substantially unexplored and detailed insights into the aerobic rice ecosystem are yet to be examined. In this study, we have isolated rhizobacteria from rice varieties grown under aerobic conditions. Seed germination test showed that strain Ekn 03 was significantly effective in stimulating germination, enhancing shoot and root length, and increasing dry matter accumulation in treated rice plants as compared to the uninoculated plants. Under greenhouse conditions, strain Ekn 03 treated rice varieties showed an overall increase in plant height by 7.63%, dry matter accumulation by 16.23%, and total chlorophyll content by 76.47%. Soil acetylene reduction assay (ARA) (4.17 nmole ethylene/g soil/h) and in-planta ARA (4.2 × 10 −2 nmole ethylene/mg fresh weight of plant/h) was significantly higher in Ekn 03 treated rice variety PB 1509 under aerobic conditions. Other rice varieties showed comparable performance on inoculation with strain Ekn 03. The endophytic and rhizospheric population of antibiotic tagged Ekn 03 was higher in the roots of PB 1509 (1.02 × 10 4 cfu/g and 5.8 × 10 5 cfu/g soil, respectively) compared to other rice varieties. 16S rDNA sequence analysis revealed that strain Ekn 03 was having 100% similarity with Pseudomonas protegens. This study suggests that strain Ekn 03 can be used as a microbial inoculant in rice plants under aerobic system of cultivation. This is the first report on the application of P. protegens as PGPR in rice.

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Rhizobia Promote Rice (Oryza sativa L.) Growth: First Evidence in Cuba

Cited by 7 publications

References 34 publications

Los rizobios incrementan la germinación de las semillas de Coffea arabica y Coffea canephora. Segunda evidencia en Cuba

Los rizobios incrementan la germinación de las semillas de Coffea arabica y Coffea canephora. Segunda evidencia en Cuba

Rhizobium Grants the Reduction of Phosphate Fertilization during the Production of Coffee Seedlings

Bioprospecting plant growth‐promoting rhizobacteria from rice genotypes and their influence on growth under aerobic conditions

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