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- W2020163132 abstract "Sunflower plants (Helianthus annuus L. cv Sun-Gro) with different K+ nutritional status were used to study the effect of K+ starvation on shoot and root Rb+ uptake as well as its distribution in the plant. The plants were grown in hydroponic medium during 21 d. At the end of this period, Rb+ treatments were applied either to shoot or root. In one set of plants, an aqueous solution of RbCl was sprayed uniformly on shoot, while in another set, K+ from the growth nutrient solution was replaced by Rb+. The results obtained in this study indicate that K+ starvation affects differently to Rb+ uptake by shoot and roots. The root's Rb+ uptake, as it was expected, was higher in those plants with low internal content than in plants with adequate levels of K+. Conversely, K+ starvation inhibited the uptake of Rb+ by the shoot. In addition, the results showed that K+ starvation favored the accumulation of Rb+ from foliar treatment in both root and growing parts of the shoot whereas inhibited its accumulation on totally expanded leaves. These results suggest that K+ foliar treatments become less efficient in improving K+ concentration in leaves when plants are under serve K+ deprivation conditions." @default.
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- W2020163132 date "2012-10-01" @default.
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- W2020163132 title "K+ starvation causes a differential effect on shoot and root K+ (Rb+) uptake in sunflower plants" @default.
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- W2020163132 doi "https://doi.org/10.1016/j.scienta.2012.08.030" @default.
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