Diurnal changes in the sugar and organic anion concentrations in red beet leaves
1972
Austin, R.B.
Marked diurnal fluctuations in the concentrations of ethanol soluble sugars and organic anions occurred in red beet leaves. These fluctuations were related to solar radiation and air temperature. Leaves from four plots which had received different manurial treatments contained significantly different mean sugar and anion concentrations, but the patterns of the diurnal fluctuations were not affected by the manurial treatments. The results indicated a daily production of photosynthate equal to about 19 per cent per day (leaf-weight basis), compared to the net assimilation rate of 17 per cent per day as estimated for similar plants from dry-weight increase. From the results no evidence can be adduced to support the hypothesis that sugar accumulated in the leaves to an extent which inhibited photosynthesis.
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