04 Fakultät Energie-, Verfahrens- und Biotechnik
Permanent URI for this collectionhttps://elib.uni-stuttgart.de/handle/11682/5
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Item Open Access Cytokinins in different cell compartments after treatment with [8-14C]-kinetin : [abstract](1985) Graf, Josef A.; Dietz, B.; Kull, Ulrich-Item Open Access Prosomes of higher plants share biochemical properties : [abstract](1988) Schliephacke, Martin; Kremp, Anette; Schmid, Hans-Peter; Kull, Ulrich-Item Open Access Konstruktion, Leichtbau und Ökonomie bei Pflanzen(1989) Kull, Ulrich; Herbig, AstridDie Festigkeitseigenschaften von Achsen aus Pflanzenarten unterschiedlicher Stellung werden mit Hilfe der BIO-Methode (nach F. Otto) beschrieben und zu Energiegrößen in Beziehung gesetzt. Damit lassen sich Aufwandswerte K (dirnensionslos) berechnen, die dann auf die Lebensdauer der Achsen bezogen werden. Konstruktiv gute Wirtschaftlichkeit zeigen Achsen vom Bautypus der Gräser, Blattstiele von Farnen und Achsen vom Hopfen (Liane). Der K-Wert ausdauernder Achsen liegt höher, K/Lebensdauer ist aber ähnlich wie bei einjährigen. Kurzlebige Blüten- und Fruchtstiele haben einen hohen Aufwand je Zeit. Die Größe K/Lebensdauer wird in Verbindung mit der Selektion gebracht. Vergleiche mit menschlichen Konstruktionen schließen sich an.Item Open Access Significant role of taxus leaf mucilage in the water-balance : abstract only(1983) Distelbarth, Heidrun; Kull, Ulrich-Item Open Access Item Open Access Altered lipid matrix changes energy distribution in thylakoids(1987) Graf, Josef A.; Strasser, Reto J.; Kull, UlrichPhotosynthetic membranes differ from other cellular rnembranes in that they have a thylakoid specific lipid composition and a high degree of polyunsaturated fatty acids. The typical acyl lipid complement of thylakoids seems to have two functions: the organization of the membrane matrix in which the pigment protein complexes are embedded and the indirect structure-function relationships between lipid matrix and pigment protein complexes which influence energy distribution behaviour. The role of high amounts of polyunsaturated fatty acids and indirect structure-function rclationships can be studied by inhibiting fatty acid desaturation sequence with pyridazinone herbicides.Item Open Access Determination of the phytotoxicity of volatile organic compounds by measuring the germination rate of tobacco pollen : [abstract](1992) Schubert, Ute; Wisanowsky, Linda; Kull, Ulrich-Item Open Access Leaves and ramification(1992) Herbig, Astrid; Kull, UlrichLeaf veins have two main functions: they constitute the mechanical reinforcement system and the transport system. To analyse the vein pattern it is necessary to have a - as far as possible - quantitative description of the vein system of real leaves. Quantities used in modern plant anatomy have to be completed by measurements of the fractality of the ramification system (as grid dimension and as exponent of scaling) and by a measure for the partition of the leaf area and the complexity of the patch pattern which we call the supply coefficient. The leaf venation pattern is a result of the evolutionary process. To find out criteria of a relative optimization during this process, we used simple models of the ramification of leaves. By computer methods such models were tested regarding their quality as a reinforcement system. In real leaves. there must be compromises between reinforcement and transport functions. The quantities used to describe the leaf vein systems can be applied to other reticulate sytems. We selected street nets of towns , and some comparisons between the ramification systems of leaves and of towns show similarities and differences which are discussed.Item Open Access The proteasome of Solanum tuberosum exhibits three different catalytic functions : [abstract](1993) Vallon, Ulrike; Kull, Ulrich-Item Open Access State-1 state-2 transition influenced by herbicides which modify fatty acid composition in leaves(1984) Graf, Josef A.; Strasser, Reto J.; Kull, UlrichInteractions of herbicides with photosynthetic membranes are still not solved in many respects. Three different modes of action have been reported for pyridazinone herbicides : inhibition of (1) photosynthetic electron transport (2) carotenoid biosynthesis and (3) fatty acid desaturation in the galactolipid fraction of chloroplasts. The pyridazinone BASF 13-338 (=SAN 9785) used in our investigations has no effect on pigmentsynthesis and photosynthetic activity but affects fatty acid desaturation in leaves. Cerulenin an antibiotic from the fungus Cephalosporium caerulens inhibits fatty acid synthesis generally. Both herbicides act indirectly on photosynthesis because they alter the mobility of photosynthetic units in the membrane.