Stress temperature and soil drought effects on amino acid composition in winter wheat

1Babenko, LM
1Romanenko, KO
1Kosakivska, IV
1M. G. Kholodny Institute of Botany of the NAS of Ukraine, Kyiv
Dopov. Nac. akad. nauk Ukr. 2020, 2:87-92
https://doi.org/10.15407/dopovidi2020.02.087
Section: Ecology
Language: English
Abstract: 

The effect of short-term high (40 °C, 2 h) and positive low (4 °C, 2 h) temperatures, as well as simulated moderate soil drought, on the total free amino acid and proline contents is studied under controlled conditions on organs of 14-day-old Triticum aestivum L. plants, the cultivar Podolyanka. The contents of free amino acids and proline are found to be higher in shoots of control plants and are, respectively, 18.29 mg/g and 0.85 mg/g of dry weight. Under simulated moderate soil drought conditions, the free amino acids and proline contents increase in shoots by 17 % and 71 %, respectively, while in the roots by 50 % and 61 %. During a short-term hyperthermia, the increases in free amino acid and proline content in shoots by 12 and 47 %, respectively, and in roots by 30 % and 23 %, respectively, are also observed. The response to a short-term hyperthermia was less pronounced. The involvement of free amino acids and proline in developing the resistance to abiotic stressors in winter wheat is discussed.

Keywords: free amino acids, proline, soil drought, temperature stress, Triticum aestivum
References: 

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