Dynamics of Macro- and Micronutrients in Cuphea |
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| Authors: | Abdullah A Jaradat Jana L Rinke |
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| Institution: | United States Department of Agriculture , Agricultural Research Service , Morris, Minnesota, USA |
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| Abstract: | Temporal dynamics of nutrient densities, their interrelationships, and remobilization from leaves to seeds of cuphea were quantified in growth chamber and field studies. Temporal nutrient densities in leaf samples exhibited large levels of variation, whether remobilized and largely accumulated in the seed copper, (Cu), potassium (K), phosphorus (P), sulfur (S) and zinc (Zn)], remobilized and accumulated in the seed coat boron (B), calcium (Ca), iron (Fe), magnesium (Mg), manganese (Mn), and sodium (Na)] or almost excluded from the seed barium (Ba), selenium (Se) and strontium (Sr)]. The temporal seed-to-leaf nutrient density “S]/L]” ratios and the proportion of variance unique to each nutrient separated the nutrients into a group (Cu, Fe, S, and Zn) with large S]/L] ratios and large unique variances, and another group (B, Ca, Mg, Mn and Sr) with small S]/L] ratios and small unique variances; the first group was selectively stored in the developing embryo. Nutrients with large densities in leaves at harvest may constitute a resource potentially available for subsequent crops. |
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| Keywords: | cuphea oil crop nutrient density nutrient homeostasis |
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