Review
Agronomy
Jagdish K. Ladha, Mark B. Peoples, Pallavolu M. Reddy, Jatish C. Biswas, Alan Bennett, Mangi L. Jat, Timothy J. Krupnik
Summary: This review examines the importance of biological nitrogen fixation in crop production and the contribution of nitrogen sources on a global scale. Strategies to enhance the efficiency of biological nitrogen fixation are discussed, along with the challenges and potential of introducing biological nitrogen fixation into conventional and alternative crop management systems.
FIELD CROPS RESEARCH
(2022)
Article
Multidisciplinary Sciences
Rebecca S. Sherbo, Pamela A. Silver, Daniel G. Nocera
Summary: Microbes can offer a more sustainable and energy-efficient option for food and nutrient production compared to plants and animals, but it requires intensive energy inputs. Researchers have discovered that hydrogen-oxidizing carbon and nitrogen-fixing microorganisms can overproduce vitamin B2 using a mixture of gases. This method has shown promising results in maintaining high production of vitamin B2 under hybrid inorganic-biological conditions.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Review
Geosciences, Multidisciplinary
Tianya Yin, Maoyuan Feng, Chunjing Qiu, Shushi Peng
Summary: Peatlands cover 3% of the Earth's surface and are important for storing carbon. The sources of nitrogen supporting peatland formation are unclear. Global peatlands store 5.9-25.9 Gt N, with northern peatlands accumulating nitrogen at a lower rate than tropical undisturbed peatlands over the past millennia.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Microbiology
Natalia I. Garcia-Tomsig, Fernando M. Garcia-Rodriguez, Sabina K. Guedes-Garcia, Vicenta Millan, Anke Becker, Marta Robledo, Jose I. Jimenez-Zurdo
Summary: The N status transduced by the NtrBC system is an important signaling cue in the root nodule endosymbiosis, and the sRNA NfeR1 influences the symbiotic performance of Sinorhizobium meliloti by fine-tuning NtrBC output.
Article
Microbiology
Zhiwen Luo, Qiuping Zhong, Xingguo Han, Ruiwen Hu, Xingyu Liu, Wenjun Xu, Yongjie Wu, Weiming Huang, Zhengyuan Zhou, Wei Zhuang, Qingyun Yan, Zhili He, Cheng Wang
Summary: Biological nitrogen fixation in mangrove sediments varies with depth, with nitrogen fixation rate increasing while diversity of diazotrophic communities decreasing. The structure of diazotrophic communities is mainly influenced by salinity and shows a clear divergence at the 50 cm depth mark.
Article
Agronomy
Wenhai Huang, Yuhao Yang, Haoyu Zheng, Jorgen Eivind Olesen, Robert M. Rees, Jun Zou, Li Zhang, Suya Hu, Bowen Qiao, Xiaohui Wang, Shuaijie Shen, Biaoding Yang, Zhiyuan Bai, Axiang Zheng, Wenjie Li, Zhenwei Song, Xinya Wen, Fu Chen, Xiaogang Yin
Summary: This study evaluated the effects of different fertilizer nitrogen inputs on the yield and biological nitrogen fixation (BNF) of summer peanut in the North China Plain (NCP). The results showed that the optimal nitrogen application rate for achieving high nitrogen use efficiency (NUE) and low nitrogen losses without sacrificing yield was 150 kg N ha-1, which resulted in a yield of 3915 kg ha-1 and NUEoi of 73.0% in the summer-peanut production. These findings have important implications for the sustainable development of summer-peanut systems.
FIELD CROPS RESEARCH
(2023)
Correction
Soil Science
Ernesto Saiz, Fotis Sgouridis, Falko P. Drijfhout, Sami Ullah
Summary: The results showed significant inconsistencies in carbon abundance across species, sites, and time.
SOIL BIOLOGY & BIOCHEMISTRY
(2021)
Review
Microbiology
Abderrahim Aasfar, Adnane Bargaz, Kaoutar Yaakoubi, Abderraouf Hilali, Iman Bennis, Youssef Zeroual, Issam Meftah Kadmiri
Summary: Biological nitrogen fixation involves microbial conversion of atmospheric nitrogen into plant absorbable ammonium. Azotobacter species play a crucial role in improving plant nutrition and soil fertility as important free-living N-2-fixing bacteria.
FRONTIERS IN MICROBIOLOGY
(2021)
Article
Plant Sciences
Ting Luo, Chang-Ning Li, Rui Yan, Kejun Huang, Yang-Rui Li, Xiao-Yan Liu, Prakash Lakshmanan
Summary: Excessive use of nitrogen fertilizer is a significant cause of greenhouse gas emission in sugarcane cultivation. Exploiting genetic variation in high-BNF Saccharum spontaneum can help develop nitrogen-efficient varieties. Remarkable genetic variation for BNF and growth was found in S. spontaneum accessions, and some accessions exhibited high resilience to inorganic N application.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Multidisciplinary Sciences
Shailesh Nair, Zenghu Zhang, Hongmei Li, Hanshuang Zhao, Hui Shen, Shuh-Ji Kao, Nianzhi Jiao, Yongyu Zhang
Summary: Mutualism between Synechococcus and heterotrophic bacteria can support their survival in nutrient-depleted conditions. However, exogenous nutrients can disrupt their established mutualism. Once the exogenous nutrients are exhausted, the mutualism and the health of Synechococcus can gradually be reestablished, with nitrogen fixation by associated bacteria playing a crucial role in this process.
Article
Biochemical Research Methods
Amy Wen, Keira L. Havens, Sarah E. Bloch, Neal Shah, Douglas A. Higgins, Austin G. Davis-Richardson, Judee Sharon, Farzaneh Rezaei, Mahsa Mohiti-Asli, Allison Johnson, Gabriel Abud, Jean-Michel Ane, Junko Maeda, Valentina Infante, Shayin S. Gottlieb, James G. Lorigan, Lorena Williams, Alana Horton, Megan McKellar, Dominic Soriano, Zoe Caron, Hannah Elzinga, Ashley Graham, Rosemary Clark, San-Ming Mak, Laura Stupin, Alice Robinson, Natalie Hubbard, Richard Broglie, Alvin Tamsir, Karsten Temme
Summary: Agricultural productivity heavily relies on synthetic nitrogen fertilizers, but the environmental loss of reactive nitrogen is a major concern. This study introduces a microbial product optimized with synthetic biology tools to enable biological nitrogen fixation for corn, demonstrating its successful commercialization and potential to replace synthetic nitrogen fertilizers. Field trials showed that the product significantly increased nitrogen fixation activity and led to higher yields with reduced variance, highlighting the agronomic benefits of a broad-acre biological nitrogen fixation product.
ACS SYNTHETIC BIOLOGY
(2021)
Article
Environmental Sciences
Yuexi Jiang, Ji Liu, Yanyan Li, Peng Xiao, Shuang Liu, Jihai Shao, Yixiang Cai, Xiaoqi Yan, Li Fan
Summary: Cadmium contamination is a threat to human health and limits biological nitrogen fixation (BNF) in paddy fields. Biochar amendment can inactivate Cd, but its effects on BNF and grain nitrogen (N) use efficiency in paddies are uncertain. We investigated the effects of biochar on diazotrophic bacterial communities in Cd-contaminated paddy fields and found that it increased the abundance of diazotrophic bacteria in certain rice growth stages. Changes in the soil carbon/nitrogen ratio and the limited available nutrients in biochar were found to be driving factors affecting diazotrophic microbial communities. Biochar amendment also increased BNF efficiency, but decreased it during certain growth stages and reduced grain N use efficiency.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Multidisciplinary Sciences
Claudio Cacace, Juan C. Garcia-Gil, Claudio Cocozza, Francesco De Mastro, Gennaro Brunetti, Andreina Traversa
Summary: Soil degradation from deforestation results in a decline in soil quality. Reforestation with pioneer species can restore the soil. This study investigated the effects of cypress and black locust on soil properties and microbial activities in two marginal soils. Cypress reforestation showed higher soil carbon, nitrogen, and enzyme activities, while black locust reforestation had lower soil quality compared to the native soil. The results suggest that cypress reforestation can effectively restore soil quality.
SCIENTIFIC REPORTS
(2022)
Article
Medical Laboratory Technology
Ghulam Qadir Chanihoon, Hassan Imran Afridi, Tasneem Gul Kazi, Farah Naz Talpur, Jameel Ahmed Baig
Summary: Ewing sarcoma patients have lower zinc and higher cadmium levels in their biological samples compared to healthy subjects. Blood parameters such as hemoglobin and RBC counts were significantly lower in patients while WBC count was higher. These findings suggest the potential benefit of mineral supplements containing essential trace elements for the treatment of Ewing sarcoma.
CLINICA CHIMICA ACTA
(2021)
Article
Environmental Sciences
Xusheng Jiang, Yu Guo, Haixiang Li, Xiangmin Li, Jie Liu
Summary: The study found that the use of the rhizosphere soil cover method can accelerate the restoration process and improve the vegetation coverage of lead-zinc tailing ponds. The restoration also improves the chemical properties of the substrate and enhances microbial community structure and nutrient cycling.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Agronomy
Joao Paulo Santos Carvalho, Adriano Teodoro Bruzi, Fatima Maria de Souza Moreira, K. B. Silva, Gabriel Mendes Villela
Summary: The study aimed to investigate the biological nitrogen fixation (BNF) ability and symbiotic efficiency of soybean progenies with different Bradyrhizobium strains, in order to guide soybean breeding strategies. A greenhouse experiment was conducted, evaluating 24 soybean progenies and five Bradyrhizobium strains. Analysis of variance and diallel analysis revealed that genetic factors played a significant role in BNF traits, suggesting that recurrent selection could be effective in breeding. Field trial experiments further confirmed the effectiveness of certain progenies and Bradyrhizobium strains, with EA-8 progeny and INPA 03-11B strain showing promising results for yield and BNF traits.
Article
Plant Sciences
Ruby Vega-Ravello, Maria Belen Romero-Poma, Cynthia de Oliveira, Luiz Roberto Guimaraes Guilherme, Guilherme Lopes
Summary: This study aimed to investigate the effects of soil selenium application on the selenium content and tolerance of quinoa plants under water deficit conditions. The results showed that appropriate selenium application increased the grain dry mass and selenium content of quinoa grains, and improved the photosynthetic rate and antioxidant activity of quinoa under water deficit conditions.
JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION
(2023)
Article
Microbiology
Miriam Goncalves de Chaves, Luis Fernando Merloti, Leandro Fonseca de Souza, Juliana Heloisa Pine Americo-Pinheiro, Dora Ines Kozusny-Andreani, Fatima Maria de Souza Moreira, Siu Mui Tsai, Acacio Aparecido Navarrete
Summary: This study evaluated the co-occurrence relationships between archaeal taxonomic groups and soil physicochemical characteristics in Amazonian soil under different land use systems. It was found that certain archaeal classes dominated in primary and secondary forests, while others were more prevalent in agricultural systems and pastures. The number of co-occurrences between archaeal groups was lower in secondary forests, agricultural systems, and pastures compared to primary forests. These results suggest that soil texture may play a role in mediating interactions between archaeal groups.
ARCHIVES OF MICROBIOLOGY
(2023)
Article
Microbiology
Patricia Freitas Costa, Aline Oliveira Silva, Amanda Azarias Guimaraes, Lucas Lenin Resende de Assis, Marcia Rufini, Leonardo de Paiva Barbosa, Teotonio Soares de Carvalho, Fatima Maria de Souza Moreira
Summary: This study aimed to evaluate the resilience of different plant communities under iron mining activities by assessing the occurrence, diversity, and symbiotic efficiency of nitrogen-fixing bacteria. The results showed that the revegetated area had the highest diversity and symbiotic efficiency, while the native vegetation area had the lowest.
CURRENT MICROBIOLOGY
(2023)
Article
Environmental Sciences
Lais L. Silva, Marina M. Feitosa, Emerson F. Vilela, Guilherme Lopes, Luiz R. G. Guilherme, Yuri L. Zinn
Summary: High levels of arsenic were found in soils developed from ultramafic rocks in Brazil, but the arsenic was mainly contained in resistant phases and bound to secondary iron oxides. The availability of arsenic varied among soils, with some soils showing low availability and others showing high availability. Generally, the high arsenic contents in these soils do not raise immediate concerns, but the release of arsenic in groundwater and surface water deserves further investigation.
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
Osmar Klauberg-Filho, Eduardo Oliveira da Silva Lunardi, Luis Carlos Iulles Oliveira Filho, Fatima Maria de Souza Moreira, Jose Oswaldo Siqueira
Summary: This study assessed the suitability of arbuscular mycorrhizal fungi (AMF) as a part of ecological risk assessment (ERA) by conducting experiments on the effects of metal-contaminated soil on different ecotypes of AMF. The results showed that different ecotypes of AMF have varying resistance to metal contamination. The suitability of the AMF ecotoxicological test for ERA can be evaluated based on spore germination and germinative tube growth.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Plant Sciences
Luis Borges Rocha, Elaine Martins da Costa, Ana Clara Martins de Sousa Ribeiro, Jasmine Ferreira dos Santos, Rafael de Souza Miranda, Amanda Soares Santos, Stelamaris de Oliveira Paula-Marinho, Bruno Sousa Figueiredo da Fonseca, Fatima Maria de Souza Moreira
Summary: The aim of this study was to examine the efficiency of Bradyrhizobium strains in nitrogen fixation and modulation of physiological parameters and grain production in soybean genotypes. Results showed that UFLA strains increased nitrogen accumulation in the shoots of the M8372 IPRO genotype and modulated photosynthetic pigments and soluble carbohydrates contents in symbiosis with the M8349 IPRO genotype. Strains UFLA06-22 and UFLA06-24 were efficient in grain nitrogen accumulation in genotypes M8372 IPRO and M8349 IPRO. Principal component analysis demonstrated the positive impact of UFLA06-22 and UFLA06-24 strains on sustainable soybean production.
JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION
(2023)
Article
Geochemistry & Geophysics
Sergio Henrique Godinho Silva, Diego Ribeiro, Thais Santos Branco Dijair, Fernanda Magno Silva, Anita Fernanda dos Santos Teixeira, Renata Andrade, Marcelo Mancini, Luiz Roberto Guimaraes Guilherme, Nilton Curi
Summary: This study aims to evaluate the chemical composition of different quartz varieties using a portable X-ray fluorescence (pXRF) spectrometer and relate them to soil attributes. Hyaline quartz had the highest SiO2 content and the lowest contents of other elements. Random Forest algorithm identified SiO2, oxides, chlorine, sulfur, phosphorus pentoxide, and potassium oxide as the main components for discriminating quartz varieties. pXRF provided enhanced information on the chemical characterization of quartz varieties without generating chemical pollutants.
Article
Food Science & Technology
Maila Adriely Silva, Gustavo Ferreira de Sousa, Gary Banuelos, Douglas Amaral, Patrick H. Brown, Luiz Roberto Guimaraes Guilherme
Summary: This study aimed to evaluate the effect of different selenium application methods (soil or foliar) and sources (organic or inorganic) on the total selenium content and speciation in selenium-enriched soybean grains. The results showed that all treatments with inorganic selenium increased the selenium content in grains compared to the control. More than 80% of the total selenium was present as selenomethionine (SeMet), and the speciation was influenced by the selenium source and application method. The treatments using inorganic selenium, applied via soil or foliar, produced the highest content of SeMet in soybean grains. Finally, the preservation of selenium species in products derived from soybean grains should be evaluated.
Article
Food Science & Technology
Patriciani Estela Cipriano, Rodrigo Fonseca da Silva, Cynthia de Oliveira, Alexandre Boari de Lima, Fabio Aurelio Dias Martins, Gizele Celante, Alcindo Aparecido dos Santos, Marcos Vinicio Lopes Rodrigues Archilha, Marcos Felipe Pinatto Botelho, Valdemar Faquin, Luiz Roberto Guimaraes Guilherme
Summary: Agronomic biofortification with selenium can effectively increase the nutritional intake and grain yield of sorghum. Sodium selenate is more efficient compared to organoselenium compounds, but acetylselenide has a positive effect on the antioxidant system.
Article
Plant Sciences
Maila Adriely Silva, Gustavo Ferreira de Sousa, Gustavo Avelar Zorgdrager Van Opbergen, Guilherme Gerrit Avelar Zorgdrager Van Opbergen, Ana Paula Branco Corguinha, Jean Michel Moura Bueno, Gustavo Brunetto, Jose Marcos Leite, Alcindo Aparecido dos Santos, Guilherme Lopes, Luiz Roberto Guimaraes Guilherme
Summary: This study investigated the effects of selenium foliar application combined with a multi-nutrient fertilizer on soybean. The results showed that grain yield of soybean increased with the application of multi-nutrient fertilizer, while selenium rates linearly increased selenium contents up to 80 g Se ha(-1), regardless of the use of multi-nutrient fertilizer. The two genotypes (58I60 Lanca and M5917) had critical thresholds of 1.0 and 3.0 mg kg(-1) for grain selenium content, respectively. Selenium application promoted higher contents of K, P, and S in grains of genotype Lanca and higher contents of Mn and Fe in grains of genotype M5917. The findings highlight the importance of considering different fertilization strategies and genotypic variations when assessing the effects of selenium on soybean yield and grain quality.
Article
Plant Sciences
Osnar Obede da Silva Aragao, Ederson da Conceicao Jesus, Silvia Maria de Oliveira-Longatti, Andre Alves de Souza, Fatima Maria de Souza Moreira
Summary: This study aimed to investigate the effect of different soil textures and land use on microbiological attributes, and to determine whether these attributes can serve as discriminators of soils used for conventional coffee growing in the Atlantic Forest domain. The results showed that regardless of soil texture, forest vegetation maintained higher microbial biomass carbon, microbial basal respiration, metabolic quotient, and urease activity. However, the sandy texture of the Planosol soil had a significant negative effect on microbial biomass in the coffee plantation. Most enzyme activities were higher in the clayey soil of the forest and lower in the sandy soil under coffee cultivation.
JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION
(2023)
Article
Plant Sciences
Jucelino de Sousa Lima, Otavio Vitor Souza Andrade, Leonidas Canuto dos Santos, Everton Geraldo de Morais, Gabryel Silva Martins, Yhan S. Mutz, Vitor L. Nascimento, Paulo Eduardo Ribeiro Marchiori, Guilherme Lopes, Luiz Roberto Guimaraes Guilherme
Summary: Water deficit inhibits plant growth and leads to overproduction of reactive oxygen species (ROS), causing oxidative stress. Iodine (I) has been shown to enhance the antioxidant defense system and improve photosynthesis under adverse conditions. In this study, soybean plants exposed to potassium iodide (KI) concentrations of 10 and 20 .mol L-1 showed increased biomass, improved gas exchange, and reduced lipid peroxidation under water deficit. However, higher KI concentrations negatively affected photosynthetic efficiency, biomass accumulation, and partition under well-irrigated conditions.
Article
Plant Sciences
Gustavo Ferreira de Sousa, Maila Adriely Silva, Mariana Rocha de Carvalho, Everton Geraldo de Morais, Pedro Antonio Namorato Benevenute, Gustavo Avelar Zorgdrager Van Opbergen, Guilherme Gerrit Avelar Zorgdrager Van Opbergen, Luiz Roberto Guimaraes Guilherme
Summary: This study aimed to investigate the role of Se supply in improving osmotic stress tolerance in coffee seedlings while also evaluating the best timing for Se application. Results demonstrated that osmotic stress promoted mild stress in the coffee plants and led to starch degradation. Seedlings that received foliar Se application 8 days before the stress exhibited higher antioxidant enzyme activity compared to the control group.
