Water-use efficiency of winter wheat under heat and drought stress

0485115 - ÚVGZ 2019 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Hlaváčová, Marcela - Klem, Karel - Surá, Kateřina - Rapantová, Barbora - Urban, Otmar - Hlavinka, Petr - Smutná, P. - Horáková, V. - Škarpa, P. - Trnka, Miroslav
Water-use efficiency of winter wheat under heat and drought stress.
Quo vaditis agriculture, forestry and society under global change? Conference proceeding. Brno: Global change research institute, 2017 - (Urban, O.; Šprtová, M.; Klem, K.), s. 19-23. ISBN 978-80-87902-22-6.
[Quo vaditis agriculture, forestry and society under Global Change? Velké Karlovice (CZ), 02.10.2017-04.10.2017]
Grant CEP: GA MŠMT(CZ) LO1415; GA MZe QJ1310123
Institucionální podpora: RVO:86652079
Klíčová slova: winter wheat * drought stress * water-use efficiency
Obor OECD: Meteorology and atmospheric sciences

Because such extreme weather events as dry spells and heat waves are expected to occur more frequently
due to climate change, the issue of appropriate water management for sustainable agricultural production
is increasingly important. This study focuses on wheat, the second most widely grown cereal in the world
and the most common cereal in European countries. The study assesses the effects of short periods (3 and
7 days) of high temperatures (26°C as a control, 32°C, 35°C, and 38°C as daily temperature maxima from
12:00 to 14:00) and drought stress at different developmental stages (DC 31 – beginning of stem elongation,
DC 61 – flowering, and DC 75 – early grain filling) on water-use efficiency (WUE) in winter wheat
cultivar Tobak. This cultivar is one of the most widespread winter wheat cultivars in Czech Republic fields.
The analysis of WUE showed that the cv. Tobak plants were able to withstand drought stress conditions
through increased WUE. In contrast, wheat plants were stressed more markedly if exposed to higher temperatures
and drought in combination. Generally, the wheat plants were most sensitive to drought at DC
31.
Trvalý link: http://hdl.handle.net/11104/0280203