Abstract
BackgroundZinc (Zn) is an important nutrient for human beings, which is also an essential micronutrient for crop growth. This study investigated the role of Zn in coordinating the mineral elements absorption in modern wheat (Triticum aestivum L.) cultivars with a new developed method.ResultsA method was developed, and showed a robust capability to simultaneously investigate seven mineral elements uptake in wheat seedling. With this method, we found low Zn supply (< 1 μM) promoted the absorption of potassium (K), magnesium (Mg) and manganese (Mn) in wheat seedling, while high Zn supply (> 1 μM) significantly inhibited the absorption of these elements. Cultivars with the green genes (Rht-B1b and Rht-D1b) showed a higher uptake capability on ammonium (NH4+), and cultivars with Rht-B1b allele can uptake more phosphors (P), K, calcium (Ca), Mn and Zn compared to cultivars with Rht-D1b. Further analysis indicated higher uptake capability of NH4+ in cultivars contained Rhts was independent of Zn.ConclusionThe key role of Zn in coordinating for mineral elements absorption was identified in modern wheat cultivars, providing the reference for Zn application in wheat. Meanwhile, this study provides a robust method for quantifying the absorption of mineral elements, which may be adopted into the broadly investigations on the coordinated nutrients absorption of plant.
Highlights
Zinc (Zn) is an important nutrient for human beings, which is an essential micronutrient for crop growth
Foliar application of Zn can be absorbed through the cuticle and/or the stomates, and transported to leaves, stems, reproductive tissues and grains, to rescue the symptom of Zn deficiency
The contents of three elements in the control tube remained constant at any quantification time (Additional file 1: Figure S1), indicating the mineral elements were absorbed in wheat seedlings, and the quantification procedure is reliable
Summary
Zinc (Zn) is an important nutrient for human beings, which is an essential micronutrient for crop growth. Chemical fertilizer has become the main source of mineral elements for all kinds of crops [1, 2]. While these inputs help to meet the demand for crop yields, overuse of fertilizers causes serious environmental damage, such as the greenhouse effect and water eutrophication [3]. The effect of Zn in regulating other mineral elements absorption is still largely unknown, which hinders our understanding of the rational use of Zn fertilizer in agricultural production
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