Promoção de crescimento de arroz por rizóbios em diferentes níveis de adubação nitrogenada

Filho, Benjamin Dias Osório; Binz, Andreia; Lima, Rafael Friedrich de; Giongo, Adriana; de, Enilson Luiz Saccol

doi:10.1590/0103-8478cr20141066

Cited by 6 publications

(5 citation statements)

References 8 publications

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“…However, this study results reinforce the existence of beneficial interactions from PGPRs with rice plants, probably due to the increased levels of phytohormones in the tissues, especially the indole-3-acetic acid (IAA) (Osorio Filho et al, 2016). Phytohormones produced by PGPRs act at all plant development stages, and each bacterial isolate can differently stimulate production levels of specific plant hormones, which are significantly reflected in the rice plants growth physiology (Chi et al, 2005).…”

Section: Resultssupporting

confidence: 64%

“…The number of panicles per unit area is defined in the plant vegetative phase, thus, it can be stated that inoculation or coinoculation with UFRGS Lc348 and A. brasilense favored the crop vegetative phase, increasing the number of panicles with only 60% of the recommended nitrogen dose (Table 2), confirming the hypothesis that inoculation of PGPRs stimulate the development of rice plants throughout the crop cycle, directly interfering with yield components (Osorio Filho et al, 2016).…”

Section: Resultsmentioning

confidence: 56%

“…Several studies have been conducted demonstrating the colonization of PGPRs in rice plant roots and their effect on promoting the growth of this said poaceae (Chaves et al, 2016;Garcia et al, 2016;Osorio Filho et al, 2016). However, responses of cultivars are different to the inoculation, demonstrating that the ability in promoting growth from the PGPRs can be specific for each cultivar, i.e., the technique success is directly related to the interaction between plant genotype and bacterial strains, as well as the factors related to the environment (type of soil and climate).…”

Section: Introductionmentioning

confidence: 99%

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Inoculation and co-inoculation of growth promoting rhizobacteria in irrigated rice plants

Santos

Silva

Sá

et al. 2019

Agraria

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Aiming at obtaining high productivity and reduction of production costs, new techniques have been studied in rice crops, such as the use of plant growth promoting rhizobacteria (PGPR). The objective of this study was to evaluate the efficiency of inoculation and co-inoculation of rhizobia and Azospirillum brasilense in promoting the growth of irrigated rice plants cultivated in the field. Two experiments were conducted in the field, in the 2014/15 and 2015/16 crops, at the Rio Grande do Sul Rice Experiment Station. The experiment was composed of seven treatments, with two control treatments, without inoculation (81 kg ha-1 N and 135 kg ha-1 N, equivalent to 60% and 100%, respectively, of the recommended nitrogen dose). The other five treatments received only 60% of the N dose and were inoculated with the UFRGS Vp16 (Burkholderia sp.) and UFRGS Lc348 (Mesorhizobium sp.) Rhizobia, and with the commercial product containing the A. brasilense AbV5 and AbV6 strains. Inoculation and co-inoculation with PGPR may represent a viable alternative to reduce the amount of nitrogen fertilizers in rice crops.

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Section: Resultssupporting

confidence: 64%

Section: Resultsmentioning

confidence: 56%

Section: Introductionmentioning

confidence: 99%

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Inoculation and co-inoculation of growth promoting rhizobacteria in irrigated rice plants

Santos

Silva

Sá

et al. 2019

Agraria

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“…Recent research indicates that the use of plant growth-promoting bacteria enhances the efficiency of plants to absorb P [20]. This has been demonstrated by several authors in coffee plants with the Castillo and Catimor varieties when inoculated with Kocuria and Bacillus in the presence of chemical and organic fertilization [47,48].…”

Section: Discussionmentioning

confidence: 98%

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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“…There are also reports of the capacity of association between bacteria of the Rhizobium genus with grass species, yet their presence is more associated with benefits involving other mechanisms of growth promotion Osorio Filho et al, 2016). Inoculation of rice plants with Azorhizobium sp.…”

Section: Shoot N Contentmentioning

confidence: 99%

Biological nitrogen fixation in sorghum: a basis for reduction of synthetic nitrogen dependence

Paula

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The increasing population and its demands require intensifying the current agricultural model to boost productivity. Chemical fertilizers, especially nitrogen fertilizers, play a crucial role in improving agriculture in Brazil, making it a major importer. However, excessive use of chemical fertilizers raises production costs, causes environmental damage, and impacts soil microbial ecology and dynamics, which could pose long-term problems as plant-microbe interactions are considered a solution for sustainable agriculture. Hence, the agricultural model must be reassessed to reduce the demand for synthetic fertilizers and increase the use of microorganisms that enhance production sustainability. The study aimed to examine the impact of nitrogen fertilization on the diazotrophic community associated with sorghum plants and evaluate the feasibility of using pre-selected bacteria in combination with different levels of nitrogen fertilization to improve sorghum productivity and reduce chemical N fertilization dependence. The study consisted of several experiments, including: isolation of N-fixing and plant growth-promoting bacteria, selection of bacteria with biotechnological potential, evaluation of the impact of nitrogen fertilization on diazotrophic microbiota during sorghum sowing, testing the agronomic efficiency of pre-selected bacteria under greenhouse conditions, and evaluating the agronomic efficiency of pre-selected microorganisms in field conditions. The results of the study showed that different levels of nitrogen fertilization affect the composition of the diazotrophic community associated with various parts of the sorghum plant, reducing its richness, uniformity, and diversity. Inoculation with selected plant-growth promoting bacteria (Rhizobium sp. and Sphingomonas sp.) in combination with reduced levels of nitrogen fertilization significantly improved stem diameter, shoot and total dry mass, and nitrogen content of the shoot under greenhouse conditions. In field conditions, inoculation with a mixture of all tested bacteria (Rhizobium sp. and Sphingomonas sp.) showed the potential to increase forage sorghum productivity and reduce nitrogen fertilization by 25-50 %. These results indicate the potential of using these microorganisms as a biotechnological tool for sustainable agriculture. The study concluded that nitrogen fertilization impacts the diazotrophic community of sorghum plants and that the N-fixing and growth-promoting bacteria selected from the sorghum rhizosphere as seed inoculants have the potential to reduce the need for synthetic nitrogen fertilizers in sorghum production. Further research is needed to determine the optimal balance between inoculants and fertilization rates for an integrated fertilization model. Keywords: Sorghum. Biological Nitrogen Fixation. Rhizobium. Sphingomonas.

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Promoção de crescimento de arroz por rizóbios em diferentes níveis de adubação nitrogenada

Abstract: RESUMO Embora os rizóbios não apresentem a capacidade

Cited by 6 publications

References 8 publications

Inoculation and co-inoculation of growth promoting rhizobacteria in irrigated rice plants

Inoculation and co-inoculation of growth promoting rhizobacteria in irrigated rice plants

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

Biological nitrogen fixation in sorghum: a basis for reduction of synthetic nitrogen dependence

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