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The Sphaerotilus-Leptothrix group of bacteria.
Effect of mineral nutrition on lodging of cereals
In the course of an investigation into the effect of nitrogenous fertilisers on the growth and yield of cereal crops, it was observed that lodging is often the limiting factor in attaining maximalExpand
Invalidity of the acetylene reduction assay in alkane-utilizing, nitrogen-fixing bacteria.
The cause of the failure of the C2H2-C2H4 assay for nitrogen-fixing bacteria growing on lower alkanes was studied. Acetylene was a strong competitive inhibitor of methane oxidation forExpand
The Sheathed Bacteria
Sheath formation occurs in a number of filamentous aquatic bacteria. These include in the first place the organisms of the Sphaerotilus-Leptothrix group, which have the ability to deposit ferricExpand
The effect of molybdenum and nitrogen deficiencies on nitrate reduction in plant tissues
The mechanism of nitrate reduction in fungi and higher plants has been cleared up by Nason and E v a n s 3 8 and Nicholas and Nason 1 1 . In experiments with purified cell-free extracts they foundExpand
Investigations on theSphaerotilus-Leptothrix group
Thirty-fourSphaerotilus andLeptothrix strains were isolated from sewage, activated sludge and iron-containing ditch- and well-water, and their morphological and physiological characters studied. TheExpand
Soil Manganese in Relation to Plant Growth
Publisher Summary It is found that when manganese is supplied to plants in excessive amounts, it causes toxic symptoms. This chapter discusses manganese toxicity and the function of manganese inExpand
EFFECT OF pH ON SYMBIOTIC NITROGEN FIXATION OF SOME LEGUMINOUS PLANTS
This chapter discusses the effect of pH on symbiotic nitrogen fixation of some leguminous plants. Soil pH is one of the most important factors determining symbiotic nitrogen fixation under naturalExpand
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