Free Amino Acids and Methylglyoxal as Players in the Radiation Hormesis Effect after Low-Dose γ-Irradiation of Barley Seeds

Ivan Pishenin, Irina Gorbatova, Elizaveta Kazakova, Marina Podobed, Anastasiya Mitsenyk, Ekaterina Shesterikova, Alexandra Dontsova, Dmitriy Dontsov and Polina Volkova
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Ivan Pishenin: Laboratory of Cellular and Molecular Radiobiology, Russian Institute of Radiology and Agroecology, 249032 Obninsk, Russia
Irina Gorbatova: Laboratory of Cellular and Molecular Radiobiology, Russian Institute of Radiology and Agroecology, 249032 Obninsk, Russia
Elizaveta Kazakova: Laboratory of Cellular and Molecular Radiobiology, Russian Institute of Radiology and Agroecology, 249032 Obninsk, Russia
Marina Podobed: Laboratory of Cellular and Molecular Radiobiology, Russian Institute of Radiology and Agroecology, 249032 Obninsk, Russia
Anastasiya Mitsenyk: Laboratory of Cellular and Molecular Radiobiology, Russian Institute of Radiology and Agroecology, 249032 Obninsk, Russia
Ekaterina Shesterikova: Laboratory of Cellular and Molecular Radiobiology, Russian Institute of Radiology and Agroecology, 249032 Obninsk, Russia
Alexandra Dontsova: Barley Breeding and Seed Production Department, Agricultural Research Center “Donskoy”, 347740 Zernograd, Russia
Dmitriy Dontsov: Barley Breeding and Seed Production Department, Agricultural Research Center “Donskoy”, 347740 Zernograd, Russia
Polina Volkova: Laboratory of Cellular and Molecular Radiobiology, Russian Institute of Radiology and Agroecology, 249032 Obninsk, Russia

Agriculture, 2021, vol. 11, issue 10, 1-13

Abstract: Low-dose γ-irradiation can stimulate plant growth and development; however, the knowledge on the molecular mechanisms of such stimulation is yet fragmented. Irradiation of seeds leads to the mobilisation of endosperm resources and reallocation of available nitrogen to facilitate development. Based on the metabolomic analysis, several metabolites possibly involved in radiation stimulation were studied using the HPLC approach in barley cultivars after γ-irradiation of seeds. The comparison of changes in metabolite concentrations and changes in morphological traits after irradiation revealed seven metabolites that may be involved in the growth stimulation after γ-irradiation of barley seeds. Among them are free amino acids, such as γ-aminobutyric acid, β-alanine, arginine, lysine, glutamine, methionine, and a signalling compound methylglyoxal.

Keywords: radiation hormesis; GABA; β-alanine; arginine; lysine; glutamine; methionine; methylglyoxal; HPLC; morphological stimulation (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2021
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