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Tag Archives: Bacteria
Microbes, from the smallest viruses to the largest unicellular protists, dominate our oceans, playing a central role in ocean food webs and as key drivers of biogeochemical processes, yet the complex interactions and ecological significance of these relationships within and … Continue reading
Historically, bacteria have been thought of as simple cells whose only aim is to replicate. However, research over the past two decades has revealed that many types of bacteria are able to develop into communities that contain several types of … Continue reading
Siderophores are small molecular iron chelators that are produced by microbes and whose most notable function is to sequester iron from the host and provide this essential metal nutrient to microbes. Recent studies have proposed additional, noncanonical roles for siderophores, … Continue reading
Having been involved in microbiology for so long it’s sometimes difficult to see the progress we are making. When I started out as a microbiologist in the 1970s the impact of molecular biology on microbiology was overwhelming, even if it took … Continue reading
Bacteria behave differently in space, as indicated by reports of reduced lag phase, higher final cell counts, enhanced biofilm formation, increased virulence, and reduced susceptibility to antibiotics. These phenomena are theorized, at least in part, to result from reduced mass … Continue reading
Bacterial cells are intricately organized, despite the lack of membrane-bounded organelles. The extremely crowded cytoplasm promotes macromolecular self-assembly and formation of distinct subcellular structures, which perform specialized functions. For example, the cell poles act as hubs for signal transduction complexes, … Continue reading
I’ve asked the question How many different bacterial species are there on this blog before. It seems that we may be approaching an answer. A census of species of Archaea and Bacteria published recently showed that, despite ever-increasing sequencing efforts, … Continue reading
Plant root tips are covered by a protective sleeve of loosely attached border cells that can release a matrix containing proteins, polysaccharides, and DNA. In animal immune systems, extracellular DNA forms the backbone of neutrophil extracellular traps (NETs) deployed by … Continue reading