Effect of heat stress at anthesis on yield formation in winter wheat

0480342 - ÚVGZ 2018 RIV CZ eng J - Článek v odborném periodiku
Hlaváčová, Marcela - Klem, Karel - Smutná, P. - Škarpa, P. - Hlavinka, Petr - Surá, Kateřina - Rapantová, Barbora - Trnka, Miroslav
Effect of heat stress at anthesis on yield formation in winter wheat.
Plant, Soil and Environment. Roč. 63, č. 3 (2017), s. 139-144. ISSN 1214-1178. E-ISSN 1805-9368
Institucionální podpora: RVO:67179843
Klíčová slova: high temperature stress * grains number per spike * spike productivity * phytotron * Triticum aestivum L.
Obor OECD: Environmental sciences (social aspects to be 5.7)
Impakt faktor: 1.421, rok: 2017

Heat stress around anthesis is considered to have an increasing impact on wheat yield under the ongoing climate
change. However, the effect of high temperatures and their duration on formation of individual yield parameters is
still little understood. Within this study, the effect of high temperatures applied during anthesis for 3 and 7 days on
yield formation parameters was analysed. The study was conducted in growth chambers under four temperature
regimes (daily temperature maxima 26, 32, 35 and 38°C). In the periods preceding and following heat stress regimes
the plants were cultivated under ambient weather conditions. The number of grains per spike was reduced under
temperatures ≥ 35°C in cv. Bohemia and ≥ 38°C in cv. Tobak. This resulted in a similar response of spike productivity.
Thousand grain weight showed no response to temperature regime in cv. Tobak, whereas in cv. Bohemia, a peak
response to temperature with maximum at 35°C was observed. The duration of heat stress had only little effect on
most yield formation parameters.
Trvalý link: http://hdl.handle.net/11104/0276139