Atmospheric CO2 concentration, light intensity and nitrogen nutrition affect spring barley response to drought and heat stress

0567465 - ÚVGZ 2023 RIV CZ eng K - Conference Paper (Czech conference)
Findurová, Hana - Veselá, Barbora - Opoku, Emmanuel - Klem, Karel
Atmospheric CO2 concentration, light intensity and nitrogen nutrition affect spring barley response to drought and heat stress.
MendelNet 2021: Proceedings of 28th International PhD Students Conference. Brno: Mendel University in Brno, 2021 - (Cerkal, R.; Březinová Belcredi, N.; Prokešová, L.), s. 348-353. ISBN 978-80-7509-821-4.
[MendelNet 2021, Brno, 2021/11/10-2021/11/10, Mendelova univerzita. Brno (CZ), 10.11.2021-10.11.2021]
R&D Projects: GA MŠMT(CZ) EF16_019/0000797
Institutional support: RVO:86652079
Keywords : flavonoids * co2 assimilation * water use-efficiency * barke * bojos
OECD category: Plant sciences, botany
https://mnet.mendelu.cz/mendelnet2021/mnet_2021_full.pdf

The aim of this study was to compare physiological responses of two spring barley varieties,
differing in their oxidative stress tolerance, to drought and heat stress after pre-treatment under different
irradiation regimes, CO2 concentrations, and nitrogen fertilisation levels. High light intensity, elevated
CO2, and additional UV radiation increased flavonoid accumulation. Moreover, more flavonoids were
induced in oxidative stress-sensitive variety Barke. Combined drought and heat stress caused a large
decline in CO2 assimilation, whereas heat stress alone caused only minor changes. Under combined
stress, plants grown under low light intensity and no UV irradiation performed the best despite their
higher initial water use efficiency and lower flavonoids content.
Permanent Link: https://hdl.handle.net/11104/0338713