Volume 367, Issue 4, February 2020
Environmental Microbiology
Dissolved organic matter stimulates N2 fixation and nifH gene expression in Trichodesmium
Trichodesmiumis generally considered an autotroph. This work shows an enhancement in N2 fixation and nifHgene expression in Trichodesmium as a response to dissolved organic matter compounds, indicating a mixotrophic potential.
Improving Alzheimer's disease by altering gut microbiota in tree shrews with ginsenoside Rg1
Ginsenoside Rg1 may improve Alzheimer's disease symptoms in tree shrews.
DNA sequencing reveals bacterial communities in midgut and other parts of the larvae of Spodoptera exigua Hubner (Lepidoptera: Noctuidae)
Gut microbiota diversity of Spodoptera exigua Hubner.
Food Microbiology
Prevalence and antimicrobial resistance of Listeria species and molecular characterization of Listeria monocytogenes isolated from retail ready-to-eat foods
Listeria monocytogenes which harbor virulence factors linked to the pathogenesis and serotypes associated with listeriosis in ready-to-eat foods pose a health risk for consumers, particularly susceptible individuals.
Physiology and Biochemistry
Challenging the charge balance hypothesis: reconsidering buffer effect and reuptake of previously excreted organic acids by Penicillium ochrochloron
This study disproves the charge balance hypothesis as the main reason for the excretion of organic acids in Penicillium ochrochloron and confirmes the reuptake of excreted organic acids despite the presence of glucose.
Spatio-temporal formation of biofilms and extracellular matrix analysis in Azospirillum brasilense
Kinetics of Azospirillum brasilense Sp7 biofilm formation on an abiotic surface, showing cells (DAPI - blue) and flagella (FITC-labeled antibody - green) in the fluorescence microscope.
Virology
Astragaloside IV attenuates IL-1β secretion by enhancing autophagy in H1N1 infection
Astragaloside IV, a major active compound extracted from the astragalus root, has no influence on virus replication, although it can decrease secretion of IL-1β by enhancing autophagy in H1N1 infection.
