Yield formation parameters of winter wheat under two CO2 levels in water sufficient and depleted environment

0561690 - ÚVGZ 2023 RIV CZ eng K - Konferenční příspěvek (tuzemská konf.)
Hlaváčová, Marcela - Klem, Karel - Veselá, Barbora - Findurová, Hana - Hlavinka, Petr - Smutná, P. - Horáková, V. - Škarpa, P. - Trnka, Miroslav
Yield formation parameters of winter wheat under two CO2 levels in water sufficient and depleted environment.
MendelNet 2021: Proceedings of 28th International PhD Students Conference. Brno: Mendel University in Brno, 2021 - (Cerkal, R.; Březinová Belcredi, N.; Prokešová, L.), s. 31-36. 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]
Grant CEP: GA MŠMT(CZ) EF16_019/0000797
Institucionální podpora: RVO:86652079
Klíčová slova: drought stress * elevated co2 * triticum aestivum * growth chambe * yield formation parameters
Obor OECD: Agriculture
https://mnet.mendelu.cz/mendelnet2021/mnet_2021_full.pdf

Agricultural production faces with ongoing climate that in Europe takes form of changing seasonal precipitation pattern with more frequent drought spells. These changes come on top of rising air temperature and did and will affect productivity as well as onset and duration of key developmental stages for yield formation of major staple crops such as wheat. In order to ensure stable agricultural production and satisfy demand of the increasing humanpopulation, it is crucial to know responses of major field crops to these abiotic stress factors to assess suitability of genotypes to specific environmental conditions. The aim of this study was to evaluate final yield formation parameters of five winter wheat genotypes cultivated in pots and exposed to two different levels of CO2 concentrations (400 ppm as ambient and 700 ppm as elevated CO2 concentrations) and two water treatments (well- watered control and drought-stressed plants). Theexperimental treatments were set up in growth chambers from the end of heading stage (BBCH 59)to the beginning of ripening stage (BBCH 71) to simulate the conditions under future climate. The results showed that elevated CO2 concentration led to: (1) mitigation of reduction in final yield formation parameters of drought-stressed plants compared to those of control, (2) enhanced results of drought-stressed treatments compared to those of drought-stressed treatments exposed to the ambient CO2 concentration. Pannonia NS was found out as the less responsive genotype to the exposition of CO2 concentration (no statistically significant differences among ambient and elevated CO2 concentrations in all yield formation parameters were identified). On contrary, harvest index of genotype Bohemia was identified as the most sensitive parameter in response to drought stress as well as to the atmospheric CO2 concentration.
Trvalý link: https://hdl.handle.net/11104/0334204