Die Vitaminbildung in Pflanzen

Virtanen, Artturi I.; Hausen, Synnöve v.

doi:10.1007/bf01504913

Cited by 8 publications

(5 citation statements)

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“…(2) It is noteworthy that fixation of elemental N2 by these clover plants was unaffected by the previous growth in the H2-containing atmosphere. This difference in the assimilation of free and combined N might be used as support for the view of Virtanen & v. Hausen [1931] that the element is a superior source of N for nutrition of the clover plant.…”

Section: IImentioning

confidence: 79%

Mechanism of symbiotic nitrogen fixation

Wilson

Umbreit

Lee

1938

Biochemical Journal

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BECAUSE of the practical importance of the problem in agriculture, research on the fixation of atmospheric nitrogen through association of the root nodule bacteria and leguminous plants has been primarily directed towards answering questions of immediate agronomic significance. As a result, advances concerned with the more fundamental aspects of this biological process have lagged behind practical applications. Part of the lag, however, may be ascribed to lack of suitable techniques for investigation of the biochemical phases of the problem. In symbiotic nitrogen fixation the life processes of two organisms, plant and

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Section: IImentioning

confidence: 79%

Mechanism of symbiotic nitrogen fixation

Wilson

Umbreit

Lee

1938

Biochemical Journal

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“…Plants grown at their optimal pH likely will have optimal concentrations of phytonutrients for that crop. Peas grown in increasing soil pH levels (pH 4, 5, 6, and 7) had increasing levels of β-carotene of 106, 112, 264, and 193 µg·g -1 dry weight, respectively (Virtanen et al, 1933). Spinach grown at pH 4 versus pH 7 had generally decreasing levels of ascorbic acid (400 vs. 200 g/100 g dry weight, respectively) (Pfaff and Pfutzer, 1937).…”

Section: Soil Type Ph and Mineral Contentmentioning

confidence: 99%

Environmental Regulation of Human Health Nutrients (Ascorbic Acid, β-Carotene, and Folic Acid) in Fruits and Vegetables

Lester¹

2006

HortSci

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“…Numerous reports show that plants supplied with the NH 4 form of nitrogen fertilizers contain less ascorbic acid than the same plants supplied with the NO 3 form (59,(161)(162)(163)(164)(165). Also mixed NH 4 and NO 3 fertilizers resulted in lower ascorbic acid in tomatoes than when NO 3 was given alone (166).…”

Section: B Kind Of Nitrogen Fertilizersmentioning

confidence: 99%