ISSN:
1573-5036
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Summary A microbiological assay for tryptophane, as a required amino acid for the diet of the white rat, in alfalfa (Medicago sativa), soybean (Soja max), and redtop (Agrostis stolonifera major) hays, showed that this organic substance of particular food value varied widely according to the inorganic composition of the substrate upon which the plants synthesizing it were grown. The formation of tryptophane was found to be proportional to the available boron when this anion was the limiting element in the culture solution. Tryptophane synthesis was decreased when magnesium, boron, manganese, and iron were withheld from solutions offered alfalfa and soybeans. Increasing the calcium increased the production of this amino acid. The enzymatic pattern of biosynthesis revealed itself pointing out some possible reasons why such diversity in the components of the plant protein might be expected. The effects of the inorganic nutrient elements were shown to be of the same kind whether the plants were grown in nutrient solution or in colloidal clay.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01343395
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