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The role of atmospheric precipitation in anther dehiscence
Kampová, Anna ; Vosolsobě, Stanislav (advisor) ; Valuchová, Soňa (referee)
Anther dehiscence is an important process taking place at the end of the plant life cycle. This process consists of various follow-up steps which result in anther opening and pollen grains exposure. Good timing of the anther dehiscence must be synchronized with pollen grains maturation and flower opening. Atmospheric precipitation is a high-risk factor for the anther dehiscence. Male fitness of plants can be reduced when anthers open during poor weather conditions. The aim of this study was to investigate the effect of atmospheric precipitation, rain and dew, on Arabidopsis arenosa anther dehiscence. We observed that rain and dew led to a postponed final stage of the anther dehiscence. This caused delayed pollen release. The effect of aqueous and nonaqueous environment on the anther dehiscence was also tested. Experiments with transformation of A. arenosa using Agrobacterium tumefaciens were performed. Key words: anther dehiscence, flower opening, rain, dew, Arabidopsis arenosa, Agrobacterium tumefaciens, transformation
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The role of atmospheric precipitation in anther dehiscence
Kampová, Anna ; Vosolsobě, Stanislav (advisor) ; Valuchová, Soňa (referee)
Anther dehiscence is an important process taking place at the end of the plant life cycle. This process consists of various follow-up steps which result in anther opening and pollen grains exposure. Good timing of the anther dehiscence must be synchronized with pollen grains maturation and flower opening. Atmospheric precipitation is a high-risk factor for the anther dehiscence. Male fitness of plants can be reduced when anthers open during poor weather conditions. The aim of this study was to investigate the effect of atmospheric precipitation, rain and dew, on Arabidopsis arenosa anther dehiscence. We observed that rain and dew led to a postponed final stage of the anther dehiscence. This caused delayed pollen release. The effect of aqueous and nonaqueous environment on the anther dehiscence was also tested. Experiments with transformation of A. arenosa using Agrobacterium tumefaciens were performed. Key words: anther dehiscence, flower opening, rain, dew, Arabidopsis arenosa, Agrobacterium tumefaciens, transformation
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Plant meteoreception
Kampová, Anna ; Vosolsobě, Stanislav (advisor) ; Kulich, Ivan (referee)
Flowering is a crucial event in a life cycle of every single plant. Various plant species are differently affected by weather in this time of their life cycle. Weather may have an impact on flower opening speed and timing and also on flower longevity. Timing of flower opening is very important. If flower opening takes place when weather conditions are unsuited, it can be for such plant terminal, or more precisely terminal for its ability to reproduce. Flower can be very important for male fitness protection. Flower opening is regulated by phytohormones and some other signal pathways - pathways of vernalization, gibberellins, photoperiod and an autonomous one which is independent from photoperiod. Phytohormones and regulation pathways mentioned above may respond to exogenous factors, namely temperature, light, air humidity and rain. Furthermore, an anther dehiscence is the key stage of flowering. Its timing and process have a huge effect on success of plant reproduction. It is also controlled by changing of weather conditions and by phytohormones, jasmonic acid is the main trigger of this process. Environmental factors influence on anther dehiscence was not examined in detail. Key words: flower opening, anther dehiscence, environmental factors
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