Short-term application of elevated temperature and drought influences the isotopic composition of winter wheat grains

0570116 - ÚVGZ 2023 RIV CZ eng K - Conference Paper (Czech conference)
Pernicová, Natálie - Urban, Otmar - Čáslavský, Josef - Klem, Karel - Trnka, Miroslav
Short-term application of elevated temperature and drought influences the isotopic composition of winter wheat grains.
MendelNet 2021: Proceedings of 28th International PhD Students Conference. Brno: Mendel University in Brno, 2021 - (Cerkal, R.; Březinová Belcredi, N.; Prokešová, L.), s. 377-382. ISBN 978-80-7509-821-4.
[MendelNet 2021. Brno (CZ), 10.11.2021-10.11.2021]
R&D Projects: GA MŠMT(CZ) EF16_019/0000797
Institutional support: RVO:86652079
Keywords : wheat * grain * 13C * 15N * drought * high temperature
OECD category: Climatic research
https://mnet.mendelu.cz/mendelnet2021/mnet_2021_full.pdf

The study aimed to determine the differences in carbon (δ13C) and nitrogen (δ15N) stable isotope ratios in grains of three winter wheat varieties grown under optimal and stress conditions. We found that the wheat variety has a significant effect on both δ13C and δ15N isotope ratios. Short-term (nine days) exposure to drought and high temperature during the heading or stem extension development phase significantly enhanced δ13C values, but only high temperature affected δ15N values. Enhanced δ15N values support the assumption that global warming causes a higher representation of the 15N isotope in plants. Moreover, significant interactive effects of temperature and water availability on the values of both isotopes were found implying that C and N metabolisms have been altered under the investigated stress conditions. We conclude that δ13C and δ15N isotope ratios of cereal grains are sensitive indicators of stress conditions, even short-term ones
Permanent Link: https://hdl.handle.net/11104/0341471