Widespread bacterial utilization of guanidine as nitrogen source

Utilization of amino acids as a source of nitrogen by Hydrogenomonas eutropha.

Relatively little has been published on the capacity of Hydrogenomonas to utilize amino acids under conditions supporting either autotrophic or heterotrophic growth. DeCicco and Umbreit (4) found that wild-type H. facilis utilizes either phenylalanine or tyrosine for growth with glucose as the main carbon and energy source. Atkinson (2) noted that H. facilis growing autotrophically in the prese...

Utilization of ammonium as a nitrogen source: effects of ambient acidity on growth and nitrogen accumulation by soybean.

Dry matter accumulation of plants utilizing NH4+ as the sole nitrogen source generally is less than that of plants receiving NO3- unless acidity of the root-zone is controlled at a pH of about 6.0. To test the hypothesis that the reduction in growth is a consequence of nitrogen stress within the plant in response to effects of increased acidity during uptake of NH4+ by roots, nonnodulated soyb...

Methylamine uptake in Pseudomonas species strain MA: utilization of methylamine as the sole nitrogen source.

The uptake of methylamine as the sole nitrogen, but not carbon, source by Pseudomonas sp. strain MA was investigated. Under these growth conditions, a high-affinity, low-capacity uptake system was present having a Km of 16 microM and Vmax of 2 nmol.min-.mg (dry weight) of cells that was competitively inhibited by ammonium chloride. The transport system was induced by growth on succinate with me...

Residue of horse serum purification as a nitrogen source for growth of microorganisms, l-Clostridia

Insects as a Nitrogen Source for Plants

Many plants have evolved adaptations in order to survive in low nitrogen environments. One of the best-known adaptations is that of plant symbiosis with nitrogen-fixing bacteria; this is the major route by which nitrogen is incorporated into plant biomass. A portion of this plant-associated nitrogen is then lost to insects through herbivory, and insects represent a nitrogen reservoir that is ge...