This report supplements the earlier report (13) which discussed the growth rates, water and mineral nutrient intake by the same group of plants. The data herein considered deal with the chemical composition of the leaf and stem tissues at different growth intervals of pineapple plants grown in nutrient solutions in the greenhouse and in soil under field conditions with different amounts of nitr...

Studies were conducted on the effect of controlled atmosphere storage as well as chemical pretreatments on the quality of lettuce as well as biochemical composition of lettuce leaves, Lactuca sativa L., cultivar "Great Lakes." In a CA of 2.5% CO2 and 2.57 02, the lettuce heads could be stored up to 75 days. Pre-storage treatments with microbeand s6nescenceinhibiting chemicale (Captan, Phaltan, ...

Commonly, microanalysis of plant sugars is conducted on a mg. scale (1); on the microgram level, a general method appears to be lacking. Some calorimetric methods suitable for determination of microgram quantities of sugars are available, but for a combination of high sensitivity and good accuracy these are not very satisfactory. Anthrone, for example, has been used recently to determine sucros...