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Author Spotlight: Exploring Cellular Zinc Regulation Through ZnT1 Functionality
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Improved potassium nutrition retrieves phosphorus-induced decrease in zinc uptake and grain zinc concentration of
Asif Naeem1, Muhammad Aslam1, Asma Lodhi1
1Soil and Environmental Sciences Division, Nuclear Institute for Agriculture and Biology (NIAB), Faisalabad, Pakistan.
Journal of the Science of Food and Agriculture
|February 14, 2018
Summary
Potassium application effectively counteracted the negative effects of phosphorus on zinc concentration in wheat grains. This study demonstrates how potassium enhances zinc uptake and remobilization, improving grain zinc content.
Area of Science:
- Agricultural Science
- Plant Nutrition
- Soil Science
Background:
- Soil phosphorus (P) can reduce zinc (Zn) uptake and grain concentration in plants, potentially leading to low dietary Zn intake.
- Potassium (K) plays a role in plant tolerance to abiotic stresses and was investigated for its potential to mitigate P-induced decreases in grain Zn concentration in wheat.
Purpose of the Study:
- To investigate the effect of potassium application on zinc concentration and translocation in wheat shoots and grains.
- To determine if potassium can counteract the negative impact of phosphorus on grain zinc concentration.
Main Methods:
- Wheat (Triticum aestivum L. cv. Galaxy-2013) was grown under varying levels of phosphorus (10 and 50 mg kg⁻¹ soil) and zinc (0 and 5 mg kg⁻¹ soil).
- Potassium was applied at a rate of 50 mg kg⁻¹ soil to assess its impact on Zn concentration, uptake, and translocation from shoots to grains.
Main Results:
- Zinc application increased Zn concentration and uptake in wheat straw and grains, regardless of P levels.
- Optimal P application decreased grain Zn concentration but increased Zn uptake by wheat straw.
- Potassium application, combined with optimal P and Zn, fully restored grain Zn concentration, increased Zn uptake, and enhanced remobilization of Zn from straw to grains.
Conclusions:
- Potassium application increases grain Zn concentration in wheat by enhancing post-anthesis Zn uptake and remobilization of pre-anthesis straw Zn stores.
- Potassium effectively mitigates the negative effects of phosphorus on grain zinc concentration, offering a strategy to improve crop nutritional quality.
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