Review
Plant Sciences
Ma. del Carmen Orozco-Mosqueda, Ajay Kumar, Olubukola Oluranti Babalola, Gustavo Santoyo
Summary: This review analyzes rhizobiome transplantation as an ecological alternative for increasing plant protection and crop production. It compares the differences between single-strain/species inoculation and dual or consortium application and evaluates the feasibility of transplanting other associated micro-communities. The study concludes that rhizobiome transplantation is an attractive alternative, but there are challenges to its application in large-scale agriculture.
Article
Plant Sciences
Jagjot Kaur, Gulab Pandove
Summary: The agricultural sector is concerned about the increase in global population, leading to a high demand for food. In the past, the sector heavily relied on agrochemicals, which has caused environmental deterioration. The need now is to conserve the environment without affecting crop productivity. Using microbial inoculants, specifically plant growth promoting rhizobacteria (PGPR), can be a sustainable approach.
JOURNAL OF PLANT NUTRITION
(2023)
Review
Biochemistry & Molecular Biology
Yaru Gao, Hong Zou, Baoshan Wang, Fang Yuan
Summary: Saline soils pose a significant challenge to agriculture, and there is an increasing need to find effective solutions to improve plant salt tolerance. This review article explores the potential of using plant growth-promoting bacteria, both endosymbiotic and exosymbiotic, to enhance plant growth and alleviate salt stress in saline soils. The mechanisms and applications of these bacteria are discussed to provide a theoretical basis for their future use in agricultural systems.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Review
Plant Sciences
Maha Chieb, Emma W. Gachomo
Summary: Climate change exacerbates the negative effects of abiotic stresses, such as drought, on plant growth and productivity. Plant colonization by plant growth-promoting rhizobacteria (PGPR) can enhance plant drought tolerance and improve plant growth and productivity.
Article
Microbiology
Antoine Zboralski, Adrien Biessy, Martin Filion
Summary: The distribution and functions of Type III secretion systems (T3SSs) in two important bacterial groups, nitrogen-fixing rhizobia and plant-beneficial Pseudomonas spp., are discussed. T3SSs and their effectors play important roles in legume-rhizobia symbiosis and in plant-beneficial Pseudomonas spp. The diversity of T3SSs in plant-beneficial bacteria suggests their significant roles in interkingdom interactions in the rhizosphere.
Article
Agronomy
Alejandro Mendez-Bravo, Lorena C. Herrera-Cornelio, Daniel F. Garcia-Toscano, Ana L. Kiel-Martinez, Edgar Guevara-Avendano, Monica Ramirez-Vazquez, Yareli Perez-Bautista, Alfonso Mendez-Bravo, Frederique Reverchon
Summary: Combining rhizospheric and endophytic bacteria with antifungal and plant growth promoting properties can maximize their positive effect on plant growth and development. Selected bacterial strains and consortia were found to significantly promote the growth of Physalis ixocarpa, an annual native Mexican species of horticultural importance. The results indicate the potential of these bacteria in enhancing plant development and productivity.
Article
Microbiology
Candice Mazoyon, Manuella Catterou, Abdelrahman Alahmad, Gaelle Mongelard, Stephanie Guenin, Vivien Sarazin, Frederic Dubois, Jerome Duclercq
Summary: Current agricultural practices heavily rely on synthetic fertilizers, which not only consume a lot of energy but also disrupt the ecological balance. In a more sustainable approach, alternative methods based on biological interactions, such as plant growth-promoting bacteria (PGPRs), are being explored.
Article
Microbiology
Aliya Suleimanova, Daria Bulmakova, Lidiya Sokolnikova, Evgenia Egorova, Daria Itkina, Olga Kuzminova, Albina Gizatullina, Margarita Sharipova
Summary: Phosphate solubilizing microorganisms (PSMs) in soil can reduce the use of mineral phosphate fertilizer and enhance plant growth. However, only a few microorganisms capable of solubilizing both organic and mineral sources of soil phosphorus have been identified. This study focused on evaluating the solubilizing activity of phytate-hydrolyzing Pantoea brenneri soil isolates on inorganic soil phosphate. The results showed that these strains efficiently solubilized various inorganic phosphates. Through optimization of media composition and culturing conditions, as well as investigation of the solubilization mechanisms, it was determined that P. brenneri produces various acids and phosphatases while growing on insoluble phosphate sources. Additionally, greenhouse experiments demonstrated the ability of P. brenneri strains with multiple plant growth-promoting traits to enhance potato growth.
Article
Microbiology
Soumyadev Sarkar, Abigail Kamke, Kaitlyn Ward, Aoesta K. Rudick, Sara G. Baer, QingHong Ran, Brandi Feehan, Shiva Thapa, Lauren Anderson, Matthew Galliart, Ari Jumpponen, Loretta Johnson, Sonny T. M. Lee
Summary: In this study, we found that different ecotypes of Andropogon gerardii can maintain or recruit distinct bacterial but not fungal rhizobiomes after 10 years in an arid environment. We showed that A. gerardii might regulate the bacterial community to adapt to the arid environment. Our study also suggested a possible tradeoff between the generalist and the specialist bacterial communities in specific environments, which could benefit the plant host. This study provides insights into the plant host regulation of the rhizosphere bacterial and fungal communities, especially during frequent drought conditions anticipated in the future.
MICROBIOLOGY SPECTRUM
(2022)
Review
Microbiology
Sayanta Mondal, Krishnendu Pramanik, Sudip Kumar Ghosh, Priyanka Pal, Tanushree Mondal, Tithi Soren, Tushar Kanti Maiti
Summary: Arsenic is a major pollutant of soil and water, posing serious health concerns to human lives as it enters the food chain through contaminated crops. Indigenous, free-living As-resistant plant growth-promoting rhizobacteria (PGPR) play a crucial role in As immobilization and increasing As tolerance in host plants. They also impact the antioxidative defense system in plants and reduce membrane damage and electrolyte leakage, salvaging As-induced photosynthetic damage.
MICROBIOLOGICAL RESEARCH
(2021)
Review
Microbiology
Elisa Gamalero, Elisa Bona, Bernard R. Glick
Summary: This article provides an overview of current techniques used to study the interaction between plants and plant growth-promoting bacteria (PGPB). These techniques include studying plant microbiomes, DNA genome sequencing, transcriptomics, proteomics, metabolomics, genome editing, encapsulation of inoculants, imaging, nitrogenase assays, and specialized growth chambers.
Review
Biotechnology & Applied Microbiology
D. T. Nagrale, A. Chaurasia, S. Kumar, S. P. Gawande, N. S. Hiremani, Raja Shankar, N. Gokte-Narkhedkar, Y. G. Renu, Y. G. Prasad
Summary: Plant growth-promoting rhizobacteria (PGPR) have various beneficial activities for plant growth promotion and bioremediation. Beneficial microorganisms like PGPR can replace and supplement harmful chemicals and pesticides, leading to sustainable agriculture practices. This review describes the applications of PGPR in different field crops and compiles information on commercially available bacteria-based bio-formulations for the field crops.
WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
Soumyadev Sarkar, Abigail Kamke, Kaitlyn Ward, Eli Hartung, Qinghong Ran, Brandi Feehan, Matthew Galliart, Ari Jumpponen, Loretta Johnson, Sonny T. M. Lee
Summary: Climate change increases drought frequency, affecting soil-inhabiting microbiomes in North American grasslands. This study identifies a bacterial genome of interest, MAG-Pseudomonas, which may enhance drought tolerance and growth in Andropogon gerardii, a tallgrass prairie grass, under drought conditions.
Article
Microbiology
Emily Pope, Christopher Cartmell, Bradley Haltli, Ali Ahmadi, Russell G. G. Kerr
Summary: This study demonstrates that microencapsulation followed by in situ incubation can improve bacterial recovery from marine sediments by increasing abundance, viability, and diversity. Agarose encapsulation promotes higher cell viability during in situ incubation and recovers greater bacterial diversity compared to simple resuspension. The results suggest that agarose encapsulation coupled with in situ incubation facilitates the cultivation and improved recovery of bacteria from marine sediments.
FRONTIERS IN MICROBIOLOGY
(2022)
Review
Plant Sciences
Wei Fang, Fang Liu, Zhaoyuan Wu, Zhigang Zhang, Kaimei Wang
Summary: Weeds have a significant impact on crop production and ecological health, while chemical herbicides have adverse effects on the environment and food safety. To address this, microbes have been explored as bioherbicides. Plant-associated bacteria (PAB) can inhibit weed growth through the production of various compounds. However, the performance of PAB-based herbicides is influenced by multiple factors and further research is needed to maximize their effectiveness.
Review
Plant Sciences
Isis Vega, Sofia Pontigo, Adriano Nunes-Nesi, Maria de la Luz Mora, Sebastian Meier, Paula Cartes
Summary: Drought is a major constraint for crop production under current climate change scenario. The use of sustainable strategies, such as the combined use of silicon fertilization and arbuscular mycorrhizal fungi, has been suggested as a promising approach to improve crop yield and mitigate the negative effects of water deficiency stress.
JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION
(2023)
Article
Green & Sustainable Science & Technology
Carla L. Aban, Giovanni Larama, Antonella Ducci, Jorgelina Huidobro, Michel Abanto, Silvina Vargas-Gil, Carolina Perez-Brandan
Summary: Intensive agricultural farming practices, such as monoculture, compromise soil health over time due to long fallow periods and overuse of agrochemicals. Increasing plant diversity with service crops is a promising alternative for sustainability. This study assessed the effects of B. brizantha on soil bacterial communities in a common bean monoculture, finding that B. brizantha improved rhizosphere properties, increased bacterial diversity, and enhanced functions related to chemoheterotrophy.
Review
Chemistry, Multidisciplinary
Jonathan Suazo-Hernandez, Nicolas Arancibia-Miranda, Rawan Mlih, Lizethly Caceres-Jensen, Nanthi Bolan, Maria de la Luz Mora
Summary: In recent years, the release of metal and metallic oxide engineered nanoparticles (ENPs) into the environment has led to an increased accumulation in agricultural soils, posing significant risks to the ecosystem and soil health. This study examines the impact of ENPs on the physical and chemical properties of soils. The results show that the presence of ENPs can alter soil properties such as hydraulic conductivity, porosity, pH, CEC, EC, Eh, and SOM content, as well as influencing nutrient availability in the soil solution through complexation or precipitation with metal cations released from ENPs.
Review
Chemistry, Multidisciplinary
Jonathan Suazo-Hernandez, Pamela Sepulveda, Lizethly Caceres-Jensen, Jorge Castro-Rojas, Patricia Poblete-Grant, Nanthi Bolan, Maria de la Luz Mora
Summary: In the past decade, the use of nanoscale zero-valent iron (nZVI) as an adsorbent has gained attention due to its low cost, non-toxicity, high porosity, and BET-specific surface area. Immobilizing nZVI particles onto inorganic and organic substrates has decreased their agglomeration and enhanced their adsorption capacity for pollutants. However, there is a lack of comprehensive review studies on phosphate removal from aquatic systems. This study evaluates different types of nZVI and nanocomposites, factors affecting phosphate adsorption, and the mechanisms involved in phosphate removal.
Article
Chemistry, Medicinal
Giovanni Luca Russo, Antonio Luca Langellotti, Vito Verardo, Beatriz Martin-Garcia, Maria Oliviero, Marco Baselice, Prospero Di Pierro, Angela Sorrentino, Sharon Viscardi, Luis Marileo, Raffaele Sacchi, Paolo Masi
Summary: This study explores the potential of using cheese whey, beet molasses, and corn steep liquor as alternative nutrient sources for cultivating Phaeodactylum tricornutum. The results show that cheese whey hydrolysate significantly enhances cell growth, while beet molasses increases biomass production and fucoxanthin yield. By optimizing the medium composition, the study achieved a biomass yield of 2.35 g L-1 and a fucoxanthin yield of 3.64 mg L-1. This research demonstrates the efficient production of fucoxanthin and other high-value products using food by-products from a biorefinery perspective.
Article
Chemistry, Medicinal
Luis Marileo, Jacqueline Acuna, Joaquin Rilling, Paola Diaz, Antonio Luca Langellotti, Giovanni Luca Russo, Patricio Javier Barra, Patricio Dantagnan, Sharon Viscardi
Summary: Thraustochytrids are important sources of bioactive compounds, such as essential polyunsaturated fatty acids, which play a role in immune system regulation. This study explores the use of co-cultures of Aurantiochytrium sp. and bacteria to stimulate PUFA bioaccumulation. The co-culture of Lentilactobacillus kefiri K6.10 strain at 72 h gave the highest PUFA content.
Article
Geography, Physical
Paulina Pradel, Leon A. Bravo, Carolina Merino, Nicole Trefault, Rodrigo Rodriguez, Heike Knicker, Claudia Jara, Giovanni Larama, Francisco Matus
Summary: The impacts of rapid warming on soil organic matter decomposition in King George Island, Maritime Antarctic, remain unclear. Most vegetation cover is dominated by mosses, which contribute carbohydrates and C-alkyl but lack lignin for aromatic compounds and humus formation. The response of Antarctic microbial respiration to substrate and temperature increase is not yet understood.
PERMAFROST AND PERIGLACIAL PROCESSES
(2023)
Article
Medicine, General & Internal
Sharon Viscardi, Luis Marileo, Hugo Delgado, Andres San Martin, Loreto Hernandez, Paola Garces, Dina Guzman-Oyarzo, Rodrigo Boguen, Gustavo Medina, Pablo Letelier, Ines Villano, Neftali Guzman
Summary: It is reported that patients with obesity are more frequently hospitalized for COVID-19, and there is evidence that obesity is a risk factor. The study found that obesity is associated with changes in laboratory biomarkers and the risk of adverse clinical outcomes in hospitalized COVID-19 patients. Inflammatory and hemostasis parameters were significantly elevated in obese patients, and there was a positive correlation between obesity, changes in laboratory biomarkers, and the risk of adverse clinical outcomes.
JOURNAL OF CLINICAL MEDICINE
(2023)
Article
Agronomy
Jacquelinne J. Acuna, Joaquin I. Rilling, Nitza G. Inostroza, Javiera Manquian, Qian Zhang, Vadakattu V. S. R. Gupta, Milko A. Jorquera
Summary: In this study, the diversity, community structure, and potential functions of root-associated bacterial communities of four Chilean wheat cultivars were explored. Results showed that Proteobacteria was the most abundant phylum in root endosphere and rhizosphere samples across all cultivars. Significant differences in alpha and beta diversity were observed in both root endosphere and rhizosphere samples. Potassium was identified as the main factor driving the rhizosphere microbiomes of wheat. Analyses of larger predicted functional activities revealed differences between the root endosphere and rhizosphere, with chemoheterotrophy and nitrogen cycling being the main functions in each environment. A co-occurrence analysis identified keystone taxa for the root endosphere and rhizosphere. These findings can contribute to the development of new wheat cultivars with specific bacterial communities.
Article
Microbiology
Eulalia Sans-Serramitjana, Carla Gallardo-Benavente, Francisco Melo, Jose M. Perez-Donoso, Cornelia Rumpel, Patricio Javier Barra, Paola Duran, Maria de La Luz Mora
Summary: This study examined the biosynthesis and characterization of selenium nanoparticles (SeNPs) using two endophytic selenobacteria. The results showed that both strains were suitable for producing SeNPs with different properties. The SeNPs were surrounded by the proteins, lipids, and polysaccharides of bacterial cells, and the functional groups present in SeNPs from one strain were higher in number than in the other strain. The findings support the potential of these endophytic strains as biocatalysts for producing high-quality Se-based nanoparticles, and future efforts should focus on evaluating their bioactivity and determining how the different features of each SeNP modulate their biological action and stability.
Article
Plant Sciences
Sofia Pontigo, Leyla Parra-Almuna, Ana Luengo-Escobar, Patricia Poblete-Grant, Adriano Nunes-Nesi, Maria de la Luz Mora, Paula Cartes
Summary: This study aimed to identify ryegrass cultivars with contrasting phosphorus (P) use efficiency and assess their associated biochemical and molecular responses. Nine ryegrass cultivars were evaluated under optimal and P-deficient conditions, and the activity and gene expression of acid phosphatases (APases) and P transporters were analyzed. The results showed that cultivars with high P acquisition efficiency were influenced by root-related responses, while cultivars with high P utilization efficiency were influenced by P transporters and APase activity in shoots.
Article
Plant Sciences
Rodrigo Rodriguez, Patricio J. Barra, Giovanni Larama, Victor J. Carrion, Maria de la Luz Mora, Lauren Hale, Paola Duran
Summary: This study confirms the ability of a bioinoculant, generated by natural engineering, to promote the development of tomato plants under water stress. The microbiome engineering, mediated by Antarctic soil donation, water deficit, and multigenerational tomato host selection, resulted in increased tolerance to water deficit stress in tomato plants. Analysis of microbial community using 16s rRNA gene amplicon sequencing data suggested a restructuring of the microbiome associated with the observed tolerance improvement.
FRONTIERS IN PLANT SCIENCE
(2023)
Review
Pharmacology & Pharmacy
Eulalia Sans-Serramitjana, Macarena Obreque, Fernanda Munoz, Carlos Zaror, Maria de La Luz Mora, Miguel Vinas, Pablo Betancourt
Summary: This scoping review examines the potential role of selenium nanoparticles (SeNPs) in combating oral pathogens. The findings suggest that SeNPs have significant antimicrobial efficacy against common oral pathogens, along with effective antioxidant activity and limited toxicity. Further research is needed to evaluate their effectiveness in different settings and to provide detailed information on experimental conditions and safety.
Article
Multidisciplinary Sciences
Patricio Javier Barra, Paola Duran, Mabel Delgado, Sharon Viscardi, Stephane Claverol, Giovanni Larama, Marc Dumont, Maria de la Luz Mora
Summary: This study investigated the effects of aluminum stress and phosphorus deficiency on the proteome of aluminum-tolerant phosphobacteria. Phosphorus deficiency upregulated phosphorus metabolism proteins, while aluminum exposure downregulated iron-sulfur and heme-containing proteins and upregulated iron acquisition proteins. These findings suggest that aluminum has an impact on iron homeostasis and bacterial central metabolism.
Article
Microbiology
So Fujiyoshi, Kyoko Yarimizu, Gonzalo Fuenzalida, Marco Campos, Joaquin-Ignacio Rilling, Jacquelinne J. Acuna, Pedro Calabrano Miranda, Emma-Karin Cascales, Ishara Perera, Oscar Espinoza-Gonzalez, Leonardo Guzman, Milko A. Jorquera, Fumito Maruyama
Summary: Harmful Algal Blooms (HABs) in Isla San Pedro, Chile, are caused by rising water temperature, artificial eutrophication, and marine bacteria. This study used microscopy and genetic analysis to monitor algal and bacterial compositions in the water for one year. The results showed that different bacterial fractions, FL and PA, had stable compositions and interacted with algae differently. The study also identified a correlation between the bacterial species Polycyclovorans algicola and Pseudo-nitzschia spp., suggesting a regression effect.
CURRENT RESEARCH IN MICROBIAL SCIENCES
(2023)
