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Changes in gas exchange of selected genotypes of poppies depending on the influence by low temperature
Málek, Jan ; Hnilička, František (advisor) ; Orsák, Matyáš (referee)
The Czech republic is one of the biggest Opium poppy producers. In 2015, this plant was grown in an area of approx. 32 650 ha. Since the poppy is usually sown quite soon in the spring, it can be damaged (or negatively affected) by low temperatures. The main objective of this Bachelor thesis was to determine the speed of gas exchange in several poppy species affected by low temperatures.
In this research, altogether 12 various genotypes of Opium poppy (Papaver somniferum L.) were included in (development phase 35 BBCH). These were concretely following poppy species: CM 112, Sokol, Major, Opál, Florián, Albín, Postomi, Marianne, Budha, Lazur, Aplaus and Orbis. Under controlled conditions of a clima-box (Conviron), the plants were exposed (within 1 week) to daily temperatures of 10 °C and night temperatures of -5 °C. After one week, the night temperature was increased to 5 °C, while the daily temperature remained the same (i.e. 10 °C). In following two weeks, there was measured the photosynthesis- and transpiration- speed (using the infrared gas analysator LDpro+SD).
Base on measurements made, there was stated, that there could be noted quite big differences in photosynthesis- and transpiration- speed in particular poppy genotypes involved. This fact proves the existency of obvious differences in gas exchange speed of particular poppy species included in this research. Between the particular measurement terms, there could be also noted differences in photosynthesis- and transpiration speed, which proves the influence of low temperatures on photosynthesis- and transpiration speed.
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