Nitrogen availability and genotype affect major nutritional quality parameters of tef grain grown under irrigation

Zipora Tietel; Ella Simhon; Kelem Gashu; Devanesan Arul Ananth; Betty Schwartz; Yehoshua Saranga; Uri Yermiyahu

doi:10.1038/s41598-020-71299-x

Nitrogen availability and genotype affect major nutritional quality parameters of tef grain grown under irrigation

Zipora Tietel^*, Ella Simhon, Kelem Gashu, Devanesan Arul Ananth, Betty Schwartz, Yehoshua Saranga, Uri Yermiyahu

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

Worldwide demand for tef (Eragrostis tef) as a functional food for human consumption is increasing, thanks to its nutritional benefits and gluten-free properties. As a result, tef in now grown outside its native environment in Ethiopia and thus information is required regarding plant nutrition demands in these areas, as well as resulting grain health-related composition. In the current work, two tef genotypes were grown in Israel under irrigation in two platforms, plots in the field and pots in a greenhouse, with four and five nitrogen treatments, respectively. Nutritional and health-related quality traits were analyzed, including mineral content, fatty acid composition, hydrophilic and lipophilic antioxidative capacity, total phenolic content and basic polyphenolic profile. Our results show that tef genotypes differ in their nutritional composition, e.g. higher phenolic contents in the brown compared to the white genotype. Additionally, nitrogen availability positively affected grain fatty acid composition and iron levels in both experiments, while negatively affecting total phenolics in the field trials. To conclude, nitrogen fertilization is crucial for crop growth and productivity, however it also implicates nutritional value of the grains as food. These effects should be considered when fertilizing tef with nitrogen, to optimize both crop productivity and nutritional effects.

Original language	American English
Article number	14339
Journal	Scientific Reports
Volume	10
Issue number	1
DOIs	https://doi.org/10.1038/s41598-020-71299-x
State	Published - 1 Dec 2020

Bibliographical note

Funding Information:
This work was funded by the Center for Fertilization and Plant Nutrition (CFPN), https://www.cfpn.center. This publication forms part of the material submitted by Ella Simhon to the Faculty of Agriculture, Food and Environment, the Hebrew University of Jerusalem, in partial fulfillment of requirements for the M.Sc. degree. DAA acknowledges Agricultural Research Organization, for providing ARO -Post Doctoral Fellowship. YS is the incumbent of the Haim Gvati Chair in Agriculture.

Publisher Copyright:
© 2020, The Author(s).

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abstract = "Worldwide demand for tef (Eragrostis tef) as a functional food for human consumption is increasing, thanks to its nutritional benefits and gluten-free properties. As a result, tef in now grown outside its native environment in Ethiopia and thus information is required regarding plant nutrition demands in these areas, as well as resulting grain health-related composition. In the current work, two tef genotypes were grown in Israel under irrigation in two platforms, plots in the field and pots in a greenhouse, with four and five nitrogen treatments, respectively. Nutritional and health-related quality traits were analyzed, including mineral content, fatty acid composition, hydrophilic and lipophilic antioxidative capacity, total phenolic content and basic polyphenolic profile. Our results show that tef genotypes differ in their nutritional composition, e.g. higher phenolic contents in the brown compared to the white genotype. Additionally, nitrogen availability positively affected grain fatty acid composition and iron levels in both experiments, while negatively affecting total phenolics in the field trials. To conclude, nitrogen fertilization is crucial for crop growth and productivity, however it also implicates nutritional value of the grains as food. These effects should be considered when fertilizing tef with nitrogen, to optimize both crop productivity and nutritional effects.",

author = "Zipora Tietel and Ella Simhon and Kelem Gashu and Ananth, {Devanesan Arul} and Betty Schwartz and Yehoshua Saranga and Uri Yermiyahu",

note = "Funding Information: This work was funded by the Center for Fertilization and Plant Nutrition (CFPN), https://www.cfpn.center. This publication forms part of the material submitted by Ella Simhon to the Faculty of Agriculture, Food and Environment, the Hebrew University of Jerusalem, in partial fulfillment of requirements for the M.Sc. degree. DAA acknowledges Agricultural Research Organization, for providing ARO -Post Doctoral Fellowship. YS is the incumbent of the Haim Gvati Chair in Agriculture. Publisher Copyright: {\textcopyright} 2020, The Author(s).",

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AU - Schwartz, Betty

AU - Saranga, Yehoshua

AU - Yermiyahu, Uri

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N2 - Worldwide demand for tef (Eragrostis tef) as a functional food for human consumption is increasing, thanks to its nutritional benefits and gluten-free properties. As a result, tef in now grown outside its native environment in Ethiopia and thus information is required regarding plant nutrition demands in these areas, as well as resulting grain health-related composition. In the current work, two tef genotypes were grown in Israel under irrigation in two platforms, plots in the field and pots in a greenhouse, with four and five nitrogen treatments, respectively. Nutritional and health-related quality traits were analyzed, including mineral content, fatty acid composition, hydrophilic and lipophilic antioxidative capacity, total phenolic content and basic polyphenolic profile. Our results show that tef genotypes differ in their nutritional composition, e.g. higher phenolic contents in the brown compared to the white genotype. Additionally, nitrogen availability positively affected grain fatty acid composition and iron levels in both experiments, while negatively affecting total phenolics in the field trials. To conclude, nitrogen fertilization is crucial for crop growth and productivity, however it also implicates nutritional value of the grains as food. These effects should be considered when fertilizing tef with nitrogen, to optimize both crop productivity and nutritional effects.

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Nitrogen availability and genotype affect major nutritional quality parameters of tef grain grown under irrigation

Abstract

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