Role of host nutrition in symbiont regulation: Impact of dietary nitrogen on proliferation of obligate and facultative bacterial endosymbionts of the pea aphid Acyrthosiphon pisum

Article Abstract:

A study was conducted to investigate the impact of host nutrition on the population density of the obligate symbiont Buchnera aphidicola and the facultative symbiont Serratia symbiotica in the pea aphid Acyrthosiphon pisum. The population density of the obligate symbiont Buchnera aphidicola positively correlated with dietary nitrogen levels while the population density of the facultative symbiont Serratia symbiotica increased in aphids reared on low-nitrogen diets.

Polymerase chain reaction, Host-bacteria relationships, Pea aphid

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Putative ABC transporter responsible for acetic acid resistance in Acetobacter aceti

Article Abstract:

A study was conducted on the presence of several proteins produced in response to acetic acid revealed by the two-dimensional gel electrophoretic analysis of the membrane fraction of Acetobacter aceti. It was observed that acetic acid resistance on the host cell was conferred by AatA, which was a putative ABC transporter.

Drug resistance in microorganisms, Microbial drug resistance, Gel electrophoresis, Southern blot analysis

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Does the antibacterial activity of silver nanoparticles depend on the shape of the nanoparticle? A study of the gram-negative bacterium Escherichia coli

Article Abstract:

The antibacterial properties of silver nanoparticles against the gram-negative bacterium Escherichia coli are examined. The results have shown that silver nanoparticles have undergone a shape-dependent interaction with the gram-negative organism Escherichia coli.

Escherichia coli, Silver compounds, Properties

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