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Analysis of selected parameters inbred and hybrid maize stressed by flooding
Čečetka, Petr ; Kočová, Marie (advisor) ; Hnilička, František (referee)
Flooding is an important stress factor that influences the growth of plants and their production. Anthropogenic activity is causing gradual changes in the climate, consequently triggering changes in the distribution of precipitation. This leads to the conditions alternating between optimal, draughts, and excessive flooding that the plants have to cope with. The aim of my diploma thesis was to evaluate the consequences of flooding and the subsequent restoration of normal cultivating conditions of two inbred lines of maize (Zea mays L.) (2023 and CE704) and their reciprocal hybrids (2023xCE704, CE704x2023) that were exposed to the stress of flooding and subsequent restoration during several phases of their ontogenetic growth. For both the plants exposed to flooding and the subsequent restoration and the plants grown in optimal conditions only, there were several morphologic and physiological parameters, parameters related to the water status, and parameters that determine the extent of the damage done to the cellular structure or characterize the defense mechanisms employed by the plant in reaction to the stress. Flooding of the plants often led to an increase in their transpiration speed, stomatal conductivity, MDA and H2O2 contents, and catalase activity. For other parameters, the flooding usually...
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