Phytosynthate partitioning into leaf starch as affected by daily photosynthetic period duration in six species [Alfalfa, corn, pangola, soybean, spinach, sugarbeet, translocation, Zea mays, Digitaria decumbens, Glycine max, Spinacia oleracea, Beet vulgaris, Medicago sativa]
1980
Chatterton, N.J. | Silvius, J.E. (U.S. Dept. of Agriculture, Beltsville Maryland (USA). Light and Plant Growth Lab.)
Starch accumulation rates increased up to five-fold in the leaves of five out of six species examined when plants were shifted from a long (12 or 14-h) to a short (7-h) photosynthetic period. The five species that responded were corn (Zea mays L.), pangola (Digitaria decumbens Stent.), soybean (Glycine max L.) Merr., spinach (Spinacia oleracea L.), and sugarbeet (Beet vulgaris L.). However, the rate of starch accumulation in alfalfa (Medicago sativa L.) was unaltered following a shift from a long to a short photosynthetic period. We conclude that photosynthetic partitioning into chloroplast starch, at least in a wide variety of species, is a programmable process that can be manipulated by altering the length of the daily photosynthetic period
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