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© 1960 Oxford University Press

RESEARCH-ARTICLE

Growth Response of Triticum Coleoptiles to Non-dialysable Milk Fractions1

J. E. GANDER 2

Department of Chemistry, Montana State College Montana, U.S.A.

Dialysed skimmed cows' milk was shown to promote the elongation of Triticum vulgare var. ‘Yogo’ coleoptiles. The optimum concentration of skimmed milk was found to be one part to 200 parts distilled water. Milk dialysate was shown to inhibit elongation but after the cations were removed to have no influence upon elongation.

Gelatin, ß-lactalbumin, phosphovitin, and glycoprotein fraction IV each present at a concentration of 30 mg./100 ml., increased coleoptile elongation about 20 per cent. when compared to a distilled-water control. Proteose-peptone and {alpha}-lactalbumin caused a slight inhibition in elongation.

These results are discussed in terms of possible factors such as bacterial contamination or adsorbed growth-promoting substances as agents causing these effects.


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