Article
Biochemistry & Molecular Biology
Fengyue Zhang, Mark R. O'Brian
Summary: Bacterial iron export plays a role in mitigating high iron stress, and this study identifies the involvement of the IhpABC genes in maintaining iron homeostasis under low to moderate iron conditions. The findings suggest that IhpABC is a divalent metal ion exporter that helps regulate iron levels and prevent metal toxicity.
MOLECULAR MICROBIOLOGY
(2023)
Article
Plant Sciences
Arata Yajima, Ryo Katsuta, Mikaho Shimura, Ayaka Yoshihara, Tatsuo Saito, Ken Ishigami, Kenji Kai
Summary: The study revisited the NMR data and proposed structures of bradyoxetin and HMCP, synthesized model compounds to validate the structural differences, and concluded that the proposed structures might be incorrect based on experimental results.
JOURNAL OF NATURAL PRODUCTS
(2021)
Article
Biochemistry & Molecular Biology
Alasteir Ong, Mark R. O'Brian
Summary: In Bradyrhizobium japonicum, iron uptake involves selective outer membrane proteins and non-selective periplasmic and cytoplasmic membrane components. FsrB is identified as an iron-regulated gene required for growth on catecholate- and hydroxymate-type siderophores. The activity of FsrB occurs in the periplasm and is involved in the reduction and dissociation of iron from the siderophore.
MOLECULAR MICROBIOLOGY
(2023)
Article
Horticulture
Md Hafizur Rahman Hafiz, Ahsanul Salehin, Kazuhito Itoh
Summary: This study investigated the growth and competitive infection behaviors of two sets of Bradyrhizobium spp. strains at different temperatures to explain strain-specific soybean nodulation under local climate conditions. The results suggest that temperature plays a significant role in determining the competitive properties of B. japonicum and B. elkanii strains in soybean nodules.
Article
Agronomy
Pulak Maitra, Jubair Al-Rashid, Dipa Mandal, Md Shofiul Azam, Noorain Munim Rasul
Summary: The study showed that using PVP and Na-alginate as substrates can improve the survival rate and storage time of Bradyrhizobium japonicum strains, thereby significantly increasing the nodule number and yield of soybean in field experiments.
Article
Ecology
Karen Liebrenz, Cristina Gomez, Silvina Brambilla, Romina Frare, Margarita Stritzler, Vanina Maguire, Oscar Ruiz, Diego Soldini, Cecilia Pascuan, Gabriela Soto, Nicolas Ayub
Summary: The study identified an antioxidant cluster in Bradyrhizobium japonicum that significantly enhanced its colonization ability on soybean roots and improved plant growth and nodulation competitiveness. The findings suggest potential applications of these non-genetically modified mutant microbes in soybean production worldwide.
Article
Environmental Sciences
Paul J. Boersma, Francois Lagugne-Labarthet, Tim McDowell, Sheila M. Macfie
Summary: This study found that exposure to silver nanoparticles can be detrimental to microbes, host plants, and their symbiotic relationship. The growth of Bradyrhizobium japonicum was halted when exposed to 10 μg/mL of silver nanoparticles. Nitrogen-fertilized Glycine max seedlings were unaffected by 2.5 μg/mL of 30 nm silver nanoparticles, but growth was inhibited with the same dose of 16 nm silver nanoparticles. The use of silver nanoparticles not only interferes with general plant and bacterial growth, but also inhibits nodule development and bacterial nitrogen fixation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Agronomy
Jerzy Ksiezak, Jolanta Bojarszczuk
Summary: This study demonstrates that soybean yields and protein content can be significantly improved by seed inoculation with B. japonicum and nitrogen fertilization. Different nitrogen fertilizers and inoculation methods have varying effects on soybean yield and nutritional composition.
Article
Agronomy
Jose Bais, Hans Kandel, Thomas Desutter, Edward Deckard, Clair Keene
Summary: The relationship between soybean and Bradyrhizobium japonicum provides the majority of nitrogen required for the crop, but supplemental nitrogen studies and co-inoculation with Azospirillum are necessary to investigate higher yields. This study evaluated the effects of nitrogen rates and inoculation on nodulation and found that excessive nitrogen inhibited nodulation. Co-inoculation increased the number and volume of nodules, but did not significantly improve yield compared to inoculation with B. japonicum.
Article
Microbiology
Nikhil Manuel, Leika Rushing, Aravind Ravindran, Heather Newkirk, Ben Burrowes, Ry Young, Carlos Gonzalez
Summary: This article presents the isolation, sequencing, and annotation of a novel T7-like podophage Pasto infecting Rhizobium japonicum. Genomic analysis suggests that Pasto may be a temperate phage with no significant similarity to identified phages.
MICROBIOLOGY RESOURCE ANNOUNCEMENTS
(2021)
Article
Biochemistry & Molecular Biology
Harry Yudistira, Barney A. Geddes, Charles M. Geddes, Robert H. Gulden, Ivan J. Oresnik
Summary: The study showed that the population of B. japonicum has not developed yet in response to the recent increase in soybean production. The researchers developed a primer pair to identify and quantify B. japonicum in field soil. Results indicate that both plant density and developmental stage can affect B. japonicum populations.
CANADIAN JOURNAL OF MICROBIOLOGY
(2021)
Article
Biochemical Research Methods
Bora Onat, Hernando Rosales-Solano, Laura Ferrier, Janusz Pawliszyn
Summary: Legumes provide a nutrient-rich food source and play significant roles in agricultural sustainability. Inoculation with Bradyrhizobium japonicum is necessary for high yield of leguminous crops like soybean. Environmental factors such as drought and soil acidity can influence nodulation and crop yield. The TF-SPME technique can be used as a non-exhaustive sampling method to investigate metabolic alterations in nodules.
JOURNAL OF CHROMATOGRAPHY A
(2021)
Article
Agronomy
Dmytro Kiriziy, Sergii Kots, Lili Rybachenko, Petro Pukhtaievych
Summary: This study investigated the effects of individual nanometals carboxylates (NMC) on the nitrogen fixation rate and gas exchange parameters in soybean plants under different water conditions. Drought significantly reduced the rates of nitrogen fixation, CO2 assimilation, and transpiration in soybean plants. Pre-sowing treatment of seeds with rhizobia and NMC helped mitigate the negative effects of drought on these physiological processes.
PLANT SOIL AND ENVIRONMENT
(2022)
Article
Agronomy
Dilfuza Egamberdieva, Hua Ma, Moritz Reckling, Richard Ansong Omari, Stephan Wirth, Sonoko D. Bellingrath-Kimura
Summary: This study investigates the effects of biochar amendment, nitrogen and phosphorus supply on soybean growth and nutrient uptake. The results show that biochar application significantly increases soybean biomass and enhances the symbiotic performance of Bradyrhizobium japonicum. Additionally, biochar improves nitrogen uptake and has a positive correlation with shoot and root biomass.
Article
Microbiology
Jie Zhu, Xin Jiang, Dawei Guan, Yaowei Kang, Li Li, Fengming Cao, Baisuo Zhao, Mingchao Ma, Ji Zhao, Jun Li
Summary: This study revealed differential gene expression of Bradyrhizobium japonicum 5038 under water-deplete and subsequent water-replete conditions. The analysis showed that genes related to signaling transduction, inorganic ion transport, energy production, and metabolism were up-regulated under 10% RH, while genes involved in transcription, translation, cell membrane regulation, replication and repair, and protein processing were highly up-regulated during the subsequent rehydration process. Interestingly, most of the genes induced by 10% RH were rehydration-repressed, except for three genes encoding heat shock proteins (Hsp20).
JOURNAL OF MICROBIOLOGY
(2022)
