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How is the leaf of a higher plant adapted to its photosynthetic function ?
Matušková, Eva ; Tichá, Ingrid (advisor) ; Nátr, Lubomír (referee)
4 Abstract Photosynthesis is a complex of complete biochemical processes which are working in photosynthetic structures, in our case in the leaf of higher plant. Leaf is the main photosynthetic organ of the higher plant which is excellently adapted to its photosynthetic function. Leaf used to be thin (short transport pathways) and used to have a big leaf area which enables to catch as much as possible of incoming irradiance. Light is falling to leaf epidermis. Epidermal cells do not contain chloroplasts and they represent a system of lenses which concentrate the light to the leaf mesophyll so that a light gradient appears. The cells of the palisade parenchyma are columnar and prolongated and the intercellular spaces enable the light going deeper into the leaf mesophyll. On the surface of the palisade parenchyma cells light is scattered and reflected and thus a significant proportion of down-welling light is sent back and will be absorbed for photosynthesis. The cells of spongy parenchyma have a very irregular shape and that amplifies multiple photon scattering. Important substrate for photosynthesis is a quantity of CO2. CO2 is in surrounding atmosphere and enters the leaf mainly through stomata what is the first barrier limiting CO2 flux into the leaf if the stomata are half-open or closed. Further on, CO2...
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How is the leaf of a higher plant adapted to its photosynthetic function ?
Matušková, Eva ; Nátr, Lubomír (referee) ; Tichá, Ingrid (advisor)
4 Abstract Photosynthesis is a complex of complete biochemical processes which are working in photosynthetic structures, in our case in the leaf of higher plant. Leaf is the main photosynthetic organ of the higher plant which is excellently adapted to its photosynthetic function. Leaf used to be thin (short transport pathways) and used to have a big leaf area which enables to catch as much as possible of incoming irradiance. Light is falling to leaf epidermis. Epidermal cells do not contain chloroplasts and they represent a system of lenses which concentrate the light to the leaf mesophyll so that a light gradient appears. The cells of the palisade parenchyma are columnar and prolongated and the intercellular spaces enable the light going deeper into the leaf mesophyll. On the surface of the palisade parenchyma cells light is scattered and reflected and thus a significant proportion of down-welling light is sent back and will be absorbed for photosynthesis. The cells of spongy parenchyma have a very irregular shape and that amplifies multiple photon scattering. Important substrate for photosynthesis is a quantity of CO2. CO2 is in surrounding atmosphere and enters the leaf mainly through stomata what is the first barrier limiting CO2 flux into the leaf if the stomata are half-open or closed. Further on, CO2...
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Inovace v rámci komoditní vertikály čerstvých rajčat na francouzském trhu
Matušková, Eva
Matušková, E.: Innovation within the framework of the commodity vertical line of tomatoes on the French market Master's thesis. Brno, 2015 This Diploma thesis deals with the sector of fresh tomatoes on the French market. The thesis is focused on the issue of tomato quality and describes various factors having an impact on the quality of tomatoes. The theoretical part presents the fundamental characteristics of the industry and examines the structure of investigated commodity chain and the relationship between the individual factors. Last but not least, the first part also looks into tomato quality and various procedures of its certification. The second part of the thesis deals with the characteristics of the structure of cultivars currently proposed at the French market's supply. Furthermore, it explains various factors influencing the quality of the final product and describes different chains of events that may occur throughout the entire production process. The investigation of the chosen issue was based on a series of interviews with experts in the field. The collected data were analyzed through a framework of the analytical grid. The main conclusion of this study is that the problem of collective reputation of the product reveals itself to be crucial in this matter. The last part of this thesis examines the application of the labeling policy as a possible solution for making the French tomato market more transparent and to limit the decrease of tomato quality. The collected data can be further used to assess the future development as well as anticipate the possible forthcoming mutations of the fresh tomato market in France.
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