Studies on the Transport of Carbohydrates in the Cotton Plant

Studies in the Water Relations of the Cotton Plant

“…The method used followed that of Mason & Maskell (1928); the dried samples were hydrolysed with dilute acid, and the total reducing sugars estimated and subtracted from the dry weight. Values of the water: residual dry-weight ratio plotted against time for three of the six sowings are shown in Fig.…”

“…In view of this. Mason & Maskell (1928) proposed the use of 'residual dry weight', the dry weight less the weight of labile carbohydrates. In this way they tried to obtain a constant weight basis independent of diurnal accumulations of photosynthetic products.…”

The Influence Oe Variations in the Supply of Carbohydrate on the Process of Nectar Secretion

“…The experiments of Mason & Maskell (1928), Curtis (1935) and others, in which the ringing technique was applied to various trees and leafy shoots, showed that translocation of soluble carbohydrate materials within the plant takes place through the phloem. The supply of carbohydrate available to the shoot by translocation can be interrupted by ringing the flowering shoot below the level of the inflorescences.…”

Carbohydrate and Nitrogen Relations in Wheat Plants With Reference to Type of Growth Under Different Environmental Conditions

“…CHIBNALL (8) pointed out that estimation of the diurnal changes in nitrogen from percentages based on the dry weight of the leaf gives inaccurate and misleading results, and recommended that such percentages be calculated on the less variable fresh weight of the tissue. MASON and MASKELL (37) concluded that the apparent constancy of the fresh-weight basis is largely illusory and that in the absence of specific evidence of constancy, or especially when differential treatment might be expected to affect the moisture relations of the plant, this basis, like the customary dry-weight basis, is unsatisfactory. They suggest that when it can be safely assumed that the variation in the basic dry weight during the experiment is due to variation in labile carbohydrates, a logical procedure is to base analyses on the so-called residual dry weight, i.e., the total dry weight minus these carbohydrates.…”

“…The use of the residual dry weight, the most logical in some respects, was precluded by the fact that the experiments were of long duration anrd involved rapidly growing plants, with every likelihood of variability of constituents other than labile carbohydrates under the different experimental conditions (36,37 At the low temperature, the short daily light period produced large vegetative plants in both varieties, with increased tillering and leaf development and retarded heading and maturation, as compared with the controls with the natural day. The winter variety was more injured than was the spring variety at this day length, its heads being completely sterile.…”