Solubilisation of inorganic phosphates by inoculant strains from tropical legumes

Marra, Leandro Marciano; Oliveira, Silvia Maria de; Soares, Cláudio Roberto Fonsêca Sousa; Moreira, Fátima Maria de Souza

doi:10.1590/s0103-90162011000500015

Cited by 75 publications

(55 citation statements)

References 29 publications

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“…The formation of a solubilization halo was not detected in solid medium containing AlPO 4 . This result differed from other AlPO 4 solubilization studies in which several authors detected solubilization halos in solid media containing P precipitated with Al (Hara and Oliveira, 2005;Marra et al, 2011Marra et al, , 2012Oliveira-Longatti et al, 2014). However, it is important to note that the media and the sources of P were different from these studies.…”

Section: Discussioncontrasting

confidence: 95%

Symbiotic effectiveness of Bradyrhizobium ingae in promoting growth of Inga edulis Mart. seedlings

Porto

Farias

Chaves

et al. 2017

Rev. Bras. Ciênc. Solo

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Inga edulis Mart. is a leguminous tree adapted to acidic and low-fertility soils that establishes symbioses with nitrogen (N)-fixing bacteria. The identification of effective bacteria in biological N fixation may bolster the use of I. edulis in degraded or modified areas and agroforestry systems. Therefore, the aims of this study were evaluation of the symbiotic effectiveness of eight strains of the Bradyrhizobium genus native to Roraima in Inga edulis plants, and in vitro evaluation of the ability of the eight strains of Bradyrhizobium to develop plant growth-promoting characteristics. Determination of symbiotic effectiveness was carried out via three experiments: the first in a greenhouse in pots with a sterile substrate; the second in a greenhouse in pots containing non-sterile soil; and the third in a nursery in bags with a non-sterile substrate. Twelve treatments were evaluated: inoculation with eight strains of Bradyrhizobium ingae (ERR 490, ERR 492, ERR 493, ERR 494 T , ERR 496, ERR 497, ERR 498, and ERR 569); inoculation with two strains indicated for Inga marginata, BR 6609 and BR 6610 (positive controls); no inoculation but with mineral N; and neither inoculation nor mineral N. All of the experiments were conducted in a completely randomized design with four replicates. The first experiment was conducted for 60 days, and the other experiments were conducted for 100 days. For all of the experiments, the number of nodules, nodule dry matter, root dry matter, shoot dry matter, number of leaflets, plant height, stem diameter, total N in the shoots, root/shoot dry matter ratio, Dickson's quality index, relative effectiveness, and the Pearson correlation between the variables under study were evaluated. The strains were also evaluated by their ability to solubilize calcium and aluminum phosphates and to produce indolic compounds. The results showed that B. ingae strains were effective in biological N fixation, especially the ERR 493, ERR 498, and ERR 569 strains. These strains increased the production of shoot dry matter and total N and exhibited relative effectiveness higher than 100 % in all of the experiments. The B. ingae strains were also able to solubilize calcium and aluminum phosphates, despite their synthesis of indolic compounds. Thus, the strains of B. ingae can be used for inoculation in the production of I. edulis seedlings.

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Section: Discussioncontrasting

confidence: 95%

Symbiotic effectiveness of Bradyrhizobium ingae in promoting growth of Inga edulis Mart. seedlings

Porto

Farias

Chaves

et al. 2017

Rev. Bras. Ciênc. Solo

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“…However, the soil solution pH did not change after the experiment for any of the treatments in the present study. This result is consistent with those of Marra et al, (2011), who demonstrated that the solubilisation of insoluble inorganic phosphates is not always associated with the lowering of pH. We found the highest levels of available P in the soil solutions treated with BRP and the lowest levels in the soil solutions treated with SP.…”

Section: Discussionsupporting

confidence: 93%

Phosphate-solubilising bacteria enhance Oryza sativa growth and nutrient accumulation in an oxisol fertilized with rock phosphate

Costa

Lima

Oliveira-Longatti

et al. 2015

Ecological Engineering

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“…The genus Burkholderia can benefit plant growth in several ways, such as in siderophore production and phosphate solubilization (Vial et al, 2007;Collavino et al, 2010;Marra et al, 2011;Mathew et al, 2014). This genus represented 46 % of the sequenced isolates, occurring in all types of vegetation.…”

Section: Discussionmentioning

confidence: 99%

Diversity and Efficiency of Rhizobia Communities from Iron Mining Areas Using Cowpea as a Trap Plant

Castro

Souza

Rufini

et al. 2017

Rev. Bras. Ciênc. Solo

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How to cite: Castro JL, Souza MG, Rufini M, Guimarães AA, Rodrigues TL, Moreira FMS. Diversity and efficiency of rhizobia communities from iron mining areas using cowpea as a trap plant. Rev Bras Cienc Solo. 2017;41:e0160525. https://doi.org/10.1590/18069657rbcs20160525Copyright: This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided that the original author and source are credited. Division -Soil Processes and Properties ABSTRACT:Mining is an important economic activity. However, its impact on environment must be accessed, mainly on relevant processes for their sustainability. The objective of this study was to evaluate the diversity and efficiency of symbiotic nitrogen fixing bacterial communities in soils under different types of vegetation in the Quadrilátero Ferrífero: ironstone outcrops, Atlantic Forest, neotropical savanna, and a rehabilitated area revegetated with grass. Suspensions of soil samples collected under each type of vegetation were made in a saline solution to capture rhizobia communities that were then inoculated on cowpea [Vigna unguiculata (L.) Walp.], which was used as a trap plant. The symbiotic efficiency of the communities was evaluated in a greenhouse experiment and the data obtained were correlated to the chemical and physical properties of the soils under each type of vegetation. At the end of the experiment, the bacteria present in the nodules were isolated to evaluate their diversity. The highest numbers of nodules occurred in the treatment inoculated with soil samples from rehabilitated area revegetated with grass and neotropical savanna vegetation, and the lowest numbers were observed in the treatment inoculated with soil samples from ironstone outcrops and Atlantic Forest. In relation to root dry matter, the treatment inoculated with soil samples from Neotropical savanah was superior to those inoculated with soil samples from the other areas; already, in relation to the shoot dry matter, no significant difference among the treatments was observed. The soil properties with the greatest influence on the microbial communities were Al 3+ content, considered as high in the Atlantic Forest and neotropical savanna vegetation, as intermediate in the iron outcrops, and as very low in the rehabilitated area revegetated with grass; organic matter, considered as very high in the ironstone outcrops and neotropical savanna, as high in the Atlantic Forest, and as low in the rehabilitated area revegetated with grass; and the pH, with intermediate acidity level in the rehabilitated area revegetated with grass, high level of acidity in the iron outcrops and neotropical savanna, and very high acidity in the Atlantic Forest. After isolation of the nodules, 380 bacterial strains were obtained and separated into 27 groups by cultural characterization analysis. Genetic diversity was evaluated by the 16S rRNA gene partial sequencing of 156 strains, which identifie...

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Solubilisation of inorganic phosphates by inoculant strains from tropical legumes

Cited by 75 publications

References 29 publications

Symbiotic effectiveness of Bradyrhizobium ingae in promoting growth of Inga edulis Mart. seedlings

Symbiotic effectiveness of Bradyrhizobium ingae in promoting growth of Inga edulis Mart. seedlings

Phosphate-solubilising bacteria enhance Oryza sativa growth and nutrient accumulation in an oxisol fertilized with rock phosphate

Diversity and Efficiency of Rhizobia Communities from Iron Mining Areas Using Cowpea as a Trap Plant

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