We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
THE ACCUMULATION OF VITAMIN C DURING GERMINATION IN PEAS.
- Authors
Robertson, T. S. Brailsford
- Abstract
Certain pecularities in the graphs of synthesis of vitamin C in germinating peas are discussed. It is suggested that temperature, and later light, play a large role in determining the nature of the course of vitamin C synthesis. Peas whose embryos have been excised before germination (treated peas) will, if soaked and planted under laboratory conditions, produce high concentrations of vitamin C, in some conditions, even higher concentrations than those obtained in an intact pea under the same conditions. The synthesis of vitamin C is shown to occur in the cotyledon in any cell or group of cells, regardless of the degree of subdivision of the cotyledon. Light is found not to be necessary for the synthesis of vitamin C in the cotyledon, but to be necessary before synthesis in the leaf can occur. It would appear that the variation of the concentration of total ascorbic acid cannot be wholly attributed to variations in concentration of the ascorbic acad oxidase, which remains constant after the first two days. It is suggested that the production of too high concentrations of vitamin C for the optimum growth of the seedling may be prevented by a limiting factor within the intact pea. It is suggested that the vitamin is produced in the form of "ascorbic acid," and that the function of the vitamin in the cotyledon of the seedling can be expressed by the equation: ascorbic acid... dehydroascorbic acid.
- Subjects
PEAS; GERMINATION; VITAMIN C; VITAMIN synthesis; LEAVES
- Publication
Australian Journal of Experimental Biology & Medical Science, 1947, Vol 25, Issue 1, p41
- ISSN
0004-945X
- Publication type
Article
- DOI
10.1038/icb.1947.6