Factors affecting synthesis of ascorbic acid in cress seedlings. 2. Ascorbic acid synthesis in relation to sugar formation

The Ascorbic Acid Content of Potato Tubers

“…No detailed information is available concerning the mechanism by which ascorbic acid is formed in plant tissues; but Ray (1934) showed that the addition of certain sugars to excised pea-embryos increased the formation of the vitamin. More recently Mapson, Cruickshank & Chen (1949) found that the ascorbic acid content of cress seedlings was correlated with the concentration of hexose sugars. In potatoes a correlation was observed between the ascorbic acid and sucrose contents during the fall of the vitamin in tubers held at 10° C. (Barker, 1950).…”

The Ascorbic Acid Content of Potato Tubers. I. The Relation Between Ascorbic Acid and the Sugar Content, as Influenced by the Maturity at Lifting and by Storage

“…These results were, however, based on the external addition of sugar solutions; no evidence was obtained of the changes in the internal concentrations of the different sugars. With cress seedlings Mapson, Cruickshank & Chen (1949) have found that the content of ascorbic acid is correlated with the concentration of hexose and that there is no correlation between ascorbic acid and sucrose. In view of the above results for the potato it would be interesting to know whether, in cress seedlings, respiration is more closely linked with the content of hexose than with that of sucrose.…”

Ascorbic Acid and Dry Matter Accumulation in Turnip and Broccoli Leaf Discs After Infiltration With Inorganic Salts, Organic Acids, and Some Enzyme Inhibitors

“…In the studies by MAPSON et al (13,14) growth and, in some cases, photosynthesis was occurring simultaneously, and these workers have not described in detail the influence of their treatments upon these processes in cress seedlings. In the present studies photosynthesis was a concomitant process with ascorbic acid accumulation.…”

“…However, some tissues make it possible to separate ascorbic acid accumulation to some extent from other processes. Germinating seedlings offer such an approach, one which has been used recently by MAPSON et al (13,14). Discs of leaf tissue offer another approach to the problem (20).…”