Foliar absorption of nutrients: II

It has been hitherto indicated that the translocation of phosphorus has the biochemical response with carbohydrates in the plant. From that point of view, many workers have shown the variable effects of sucrose on the absorption and translocation of foliar applied phosphoric acid. Yatazawa et al. (1 and 2) found that in young wheat plants, phosphorus applied together with 5% sucrose on the leaf surface was absorbed about 3 times faster as that of the phosphorus without sucrose. Gustafson (3) has also obtained the same results when the absorption and translocation of cobalt from ⁶⁰CoCl₂ solution by leaves of beans kept in the dark was studied. The addition of sucrose to the applied solution promoted absorption and translocation considerably. Teubner et al. (4) indicated that 2% sucrose applied to plants grown in the light caused a marked depression of initial uptake of phosphorus, and this depression was not apparent after 12 hours of absorption, nor could it be seen with plants grown in the dark.