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Improved potassium nutrition retrieves phosphorus-induced decrease in zinc uptake and grain zinc concentration of wheat.
J Sci Food Agric. 2018 Aug; 98(11):4351-4356.JS

Abstract

BACKGROUND

The negative effect of soil-applied phosphorus (P) on zinc (Zn) uptake by plants and its concentration in food grains could be a possible reason for low dietary intake of Zn. Likewise, owing to its critical role in plant tolerance to other abiotic stresses, potassium (K) was thought to retrieve P-induced decrease in grain Zn concentration of wheat. To test the above hypothesis, the effect of K application (50 mg kg-1 soil) on Zn concentration in shoot/grains and its shoot-to-grain translocation was studied in wheat (Triticum aestivum L. cv. Galaxy-2013) under low and optimal supply of both P (10 and 50 mg kg-1) and Zn (0 and 5 mg kg-1).

RESULTS

The response of growth parameters and grain yield to optimal Zn, P and K applications indicated that all nutrients were limiting plant growth at low levels. Irrespective of P level, Zn application at optimal rate increased Zn concentration and uptake by straw and grains of wheat. Contrarily, optimal P application decreased Zn concentration but increased Zn uptake by wheat straw. More specifically, combined application of Zn and P at optimal levels decreased Zn concentration in grains from 43 to 32 mg kg-1 compared with optimal Zn application alone. Potassium application to optimal P- and Zn-supplied plants increased remobilization of pre-anthesis straw Zn store to grains by 50% and decreased Zn concentration in straw. Consequently, K application along with optimal Zn and P supply to plants completely retrieved P-induced loss in grain Zn concentration and also increased grain Zn uptake from 891 to 1249 µg per pot without significantly affecting grain yield.

CONCLUSION

The K-induced increase in grain Zn concentration is attributed to K-driven higher post-anthesis Zn uptake and remobilization of pre-anthesis straw Zn store to grains. © 2018 Society of Chemical Industry.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Naeem A
Soil and Environmental Sciences Division, Nuclear Institute for Agriculture and Biology (NIAB), Faisalabad, Pakistan.
Aslam M
Soil and Environmental Sciences Division, Nuclear Institute for Agriculture and Biology (NIAB), Faisalabad, Pakistan.
Lodhi A
Soil and Environmental Sciences Division, Nuclear Institute for Agriculture and Biology (NIAB), Faisalabad, Pakistan.

MeSH

Biological TransportFertilizersNutritional StatusPhosphorusPotassiumSoilTriticumZinc

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29435989

Citation

Naeem, Asif, et al. "Improved Potassium Nutrition Retrieves Phosphorus-induced Decrease in Zinc Uptake and Grain Zinc Concentration of Wheat." Journal of the Science of Food and Agriculture, vol. 98, no. 11, 2018, pp. 4351-4356.
Naeem A, Aslam M, Lodhi A. Improved potassium nutrition retrieves phosphorus-induced decrease in zinc uptake and grain zinc concentration of wheat. J Sci Food Agric. 2018;98(11):4351-4356.
Naeem, A., Aslam, M., & Lodhi, A. (2018). Improved potassium nutrition retrieves phosphorus-induced decrease in zinc uptake and grain zinc concentration of wheat. Journal of the Science of Food and Agriculture, 98(11), 4351-4356. https://doi.org/10.1002/jsfa.8961
Naeem A, Aslam M, Lodhi A. Improved Potassium Nutrition Retrieves Phosphorus-induced Decrease in Zinc Uptake and Grain Zinc Concentration of Wheat. J Sci Food Agric. 2018;98(11):4351-4356. PubMed PMID: 29435989.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Improved potassium nutrition retrieves phosphorus-induced decrease in zinc uptake and grain zinc concentration of wheat. AU - Naeem,Asif, AU - Aslam,Muhammad, AU - Lodhi,Asma, Y1 - 2018/03/25/ PY - 2017/12/07/received PY - 2018/02/06/revised PY - 2018/02/08/accepted PY - 2018/2/13/pubmed PY - 2018/7/24/medline PY - 2018/2/14/entrez KW - Zn remobilization KW - phosphorus-induced Zn deficiency KW - potassium KW - wheat KW - zinc biofortification SP - 4351 EP - 4356 JF - Journal of the science of food and agriculture JO - J Sci Food Agric VL - 98 IS - 11 N2 - BACKGROUND: The negative effect of soil-applied phosphorus (P) on zinc (Zn) uptake by plants and its concentration in food grains could be a possible reason for low dietary intake of Zn. Likewise, owing to its critical role in plant tolerance to other abiotic stresses, potassium (K) was thought to retrieve P-induced decrease in grain Zn concentration of wheat. To test the above hypothesis, the effect of K application (50 mg kg-1 soil) on Zn concentration in shoot/grains and its shoot-to-grain translocation was studied in wheat (Triticum aestivum L. cv. Galaxy-2013) under low and optimal supply of both P (10 and 50 mg kg-1) and Zn (0 and 5 mg kg-1). RESULTS: The response of growth parameters and grain yield to optimal Zn, P and K applications indicated that all nutrients were limiting plant growth at low levels. Irrespective of P level, Zn application at optimal rate increased Zn concentration and uptake by straw and grains of wheat. Contrarily, optimal P application decreased Zn concentration but increased Zn uptake by wheat straw. More specifically, combined application of Zn and P at optimal levels decreased Zn concentration in grains from 43 to 32 mg kg-1 compared with optimal Zn application alone. Potassium application to optimal P- and Zn-supplied plants increased remobilization of pre-anthesis straw Zn store to grains by 50% and decreased Zn concentration in straw. Consequently, K application along with optimal Zn and P supply to plants completely retrieved P-induced loss in grain Zn concentration and also increased grain Zn uptake from 891 to 1249 µg per pot without significantly affecting grain yield. CONCLUSION: The K-induced increase in grain Zn concentration is attributed to K-driven higher post-anthesis Zn uptake and remobilization of pre-anthesis straw Zn store to grains. © 2018 Society of Chemical Industry. SN - 1097-0010 UR - https://www.unboundmedicine.com/medline/citation/29435989/Improved_potassium_nutrition_retrieves_phosphorus_induced_decrease_in_zinc_uptake_and_grain_zinc_concentration_of_wheat_ DB - PRIME DP - Unbound Medicine ER -