An Actinobacterium Strain From Soil of Cerrado Promotes Phosphorus Solubilization and Plant Growth in Soybean Plants
The huge biological diversity of the Brazilian Cerrado is an important source of economically interesting microbial agents. The phylum Actinobacteria plays an important role in nutrient cycling, potentially improving their availability to plants. In this study, we isolated an actinobacteria (strain...
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doaj-b76656e1fd9a47a9ab18a5599c6bf58e2021-04-22T04:36:00ZengFrontiers Media S.A.Frontiers in Bioengineering and Biotechnology2296-41852021-04-01910.3389/fbioe.2021.579906579906An Actinobacterium Strain From Soil of Cerrado Promotes Phosphorus Solubilization and Plant Growth in Soybean PlantsHarold Alexander Vargas Hoyos0Harold Alexander Vargas Hoyos1Josiane Barros Chiaramonte2Ana Gabriele Barbosa-Casteliani3Jorge Fernandez Morais4Juan Esteban Perez-Jaramillo5Suikinai Nobre Santos6Sonia Claudia Nascimento Queiroz7Itamar Soares Melo8Program for the Study and Control of Tropical Diseases—PECET, School of Medicine, University of Antioquia, Medellín, ColombiaLaboratory of Environmental Microbiology, Embrapa Environment, Jaguariúna, BrazilLaboratory of Environmental Microbiology, Embrapa Environment, Jaguariúna, BrazilLaboratory of Environmental Microbiology, Embrapa Environment, Jaguariúna, BrazilLaboratory of Environmental Microbiology, Embrapa Environment, Jaguariúna, BrazilProgram for the Study and Control of Tropical Diseases—PECET, School of Medicine, University of Antioquia, Medellín, ColombiaLaboratory of Environmental Microbiology, Embrapa Environment, Jaguariúna, BrazilLaboratory of Environmental Microbiology, Embrapa Environment, Jaguariúna, BrazilLaboratory of Environmental Microbiology, Embrapa Environment, Jaguariúna, BrazilThe huge biological diversity of the Brazilian Cerrado is an important source of economically interesting microbial agents. The phylum Actinobacteria plays an important role in nutrient cycling, potentially improving their availability to plants. In this study, we isolated an actinobacteria (strain 3AS4) from wheat rhizospheres of crops cultivated in the Cerrado biome. Strain 3AS4 was identified as belonging to the genus Streptomyces and had phosphorus mobilization ability, mineralizing approximately 410 μg ml–1 from phytate, 300 μg ml–1 from calcium phosphate, and 200 μg ml–1 from rock phosphate. The analysis of the actinobacteria crude extract by spectrometric techniques revealed the presence of gluconic and 2-ketogluconic acid, and a greenhouse experiment was carried out to evaluate its plant growth promotion activity in soybean. Soil in its natural condition (with no phosphorus addition), 40 kg ha–1 rock phosphate from Bayovar (RP) added to soil, and triple super phosphate (SPT) added to soil were used. Significant differences in plant height were observed at 6 weeks when the plants were inoculated with the 3AS4 strain. The growth of inoculated plants in natural condition was promoted in 17% compared with the RP and SPT non-inoculated conditions, suggesting that inoculation can enable plants to grow with lower chemical P fertilizers. In the plants that were inoculated with the 3AS4 strain in the RP condition, the plant height increased by approximately 80% and the shoot:root ratio was approximately 30% higher compared to control conditions (non-inoculated plants in natural conditions). 3AS4 has P-solubilizing potential and can be exploited as an inoculant for soybean cultivation. These results suggest that this actinobacterium is a valuable resource for sustainable agriculture and will allow the reduction of phosphate fertilization in the future.https://www.frontiersin.org/articles/10.3389/fbioe.2021.579906/fullBrazilian biodiversitywheat rhizosphereStreptomyces rishiriensisgluconic acidP-solubilizing potentialplant growth promotion |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Harold Alexander Vargas Hoyos Harold Alexander Vargas Hoyos Josiane Barros Chiaramonte Ana Gabriele Barbosa-Casteliani Jorge Fernandez Morais Juan Esteban Perez-Jaramillo Suikinai Nobre Santos Sonia Claudia Nascimento Queiroz Itamar Soares Melo |
spellingShingle |
Harold Alexander Vargas Hoyos Harold Alexander Vargas Hoyos Josiane Barros Chiaramonte Ana Gabriele Barbosa-Casteliani Jorge Fernandez Morais Juan Esteban Perez-Jaramillo Suikinai Nobre Santos Sonia Claudia Nascimento Queiroz Itamar Soares Melo An Actinobacterium Strain From Soil of Cerrado Promotes Phosphorus Solubilization and Plant Growth in Soybean Plants Frontiers in Bioengineering and Biotechnology Brazilian biodiversity wheat rhizosphere Streptomyces rishiriensis gluconic acid P-solubilizing potential plant growth promotion |
author_facet |
Harold Alexander Vargas Hoyos Harold Alexander Vargas Hoyos Josiane Barros Chiaramonte Ana Gabriele Barbosa-Casteliani Jorge Fernandez Morais Juan Esteban Perez-Jaramillo Suikinai Nobre Santos Sonia Claudia Nascimento Queiroz Itamar Soares Melo |
author_sort |
Harold Alexander Vargas Hoyos |
title |
An Actinobacterium Strain From Soil of Cerrado Promotes Phosphorus Solubilization and Plant Growth in Soybean Plants |
title_short |
An Actinobacterium Strain From Soil of Cerrado Promotes Phosphorus Solubilization and Plant Growth in Soybean Plants |
title_full |
An Actinobacterium Strain From Soil of Cerrado Promotes Phosphorus Solubilization and Plant Growth in Soybean Plants |
title_fullStr |
An Actinobacterium Strain From Soil of Cerrado Promotes Phosphorus Solubilization and Plant Growth in Soybean Plants |
title_full_unstemmed |
An Actinobacterium Strain From Soil of Cerrado Promotes Phosphorus Solubilization and Plant Growth in Soybean Plants |
title_sort |
actinobacterium strain from soil of cerrado promotes phosphorus solubilization and plant growth in soybean plants |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Bioengineering and Biotechnology |
issn |
2296-4185 |
publishDate |
2021-04-01 |
description |
The huge biological diversity of the Brazilian Cerrado is an important source of economically interesting microbial agents. The phylum Actinobacteria plays an important role in nutrient cycling, potentially improving their availability to plants. In this study, we isolated an actinobacteria (strain 3AS4) from wheat rhizospheres of crops cultivated in the Cerrado biome. Strain 3AS4 was identified as belonging to the genus Streptomyces and had phosphorus mobilization ability, mineralizing approximately 410 μg ml–1 from phytate, 300 μg ml–1 from calcium phosphate, and 200 μg ml–1 from rock phosphate. The analysis of the actinobacteria crude extract by spectrometric techniques revealed the presence of gluconic and 2-ketogluconic acid, and a greenhouse experiment was carried out to evaluate its plant growth promotion activity in soybean. Soil in its natural condition (with no phosphorus addition), 40 kg ha–1 rock phosphate from Bayovar (RP) added to soil, and triple super phosphate (SPT) added to soil were used. Significant differences in plant height were observed at 6 weeks when the plants were inoculated with the 3AS4 strain. The growth of inoculated plants in natural condition was promoted in 17% compared with the RP and SPT non-inoculated conditions, suggesting that inoculation can enable plants to grow with lower chemical P fertilizers. In the plants that were inoculated with the 3AS4 strain in the RP condition, the plant height increased by approximately 80% and the shoot:root ratio was approximately 30% higher compared to control conditions (non-inoculated plants in natural conditions). 3AS4 has P-solubilizing potential and can be exploited as an inoculant for soybean cultivation. These results suggest that this actinobacterium is a valuable resource for sustainable agriculture and will allow the reduction of phosphate fertilization in the future. |
topic |
Brazilian biodiversity wheat rhizosphere Streptomyces rishiriensis gluconic acid P-solubilizing potential plant growth promotion |
url |
https://www.frontiersin.org/articles/10.3389/fbioe.2021.579906/full |
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