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Abstract
The effects of the photoperiodic induction of flowering on nutrient uptake were studied using genetic lines of pea (Pisum sativum). Nitrogen, K, P, Mn, Fe, and Cu concentrations in the plants were higher in short days (SD) (vegetative), Mg concentrations were higher in long days (LD) (reproductive). Ca, B, and Zn levels appeared to be unrelated to light regimes or flower induction. Plants grown in LD had higher total uptake of most elements, because of substantially higher dry matter production. Low light treatments that stimulated flowering had less effect on nutrient composition than LD (full light). The nutrient concentrations of a photoperiod‐insensitive line were less affected by light regime, and total uptake appeared to be primarily dependent on photosynthate production. It was concluded that the induction of flowering does not impose special demands on nutrient uptake, and that, although photoperiod affected nutrient content, the effect was indirect.
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Oregon Agricultural Experiment Station Technical Paper No. 5959
