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Literature-based studies on important renewable raw-stuff species |
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We offer a wide range of BSc theses on biology, ecology and use of plant species serving as a source for industrial use. This can include the key species for globally important ressources such as oil, starch or fibre, but also neglected plant species with potential to supplement local markets in particular. The work can focus on a commodity or a plant family. The results of this research will be included in the newly developed database: www.nawarobase.de Begin: any time |
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Contact: fa @uni-hohenheim.de |
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Ecophysiological experiments on two dominant grass species from Northern Chinese Steppe ecosystem, Leymus Chinensis and Stipa baicalensis |
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The rhizome grass Leymus chinensis and the bunch grass Stipa baicalensis are key-species of semi-arid grasslands with major contribution to the productivity of a large livestock based land use system in Northern China. Increasing temperature and rainfall variability will change growing conditions and the effects on ecosystem functions are poorly understood. Detailed physiological, greenhouse based studies are one option to understand response mechanisms of this dominant grass species to multiple abiotic stresses. We offer Bachelor's theses to analyze different ecophysiological processes related to water use of Stipa and Leymus species. The greenhouse based experiments will take about 4-6 weeks. Begin: any time |
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Contact: fa @uni-hohenheim.de |
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Effects of atmospheric drought on morphological adaptations at leaf level |
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As early as 1927 morphological adaptations of leaves of plants subjected to drought have been described. Stomata change in size and number as well as xylem vessels in length and ramification patterns. We would like to investigate if these effects can be also brought about by adaptation to atmospheric drought in combination with or without soil borne water deficit. Experimental work on different plant species will be conducted in a greenhouse. Leaf properties will be investigated by modern microscopic methods. The greenhouse based experiments will take about 4-6 weeks. Begin: any time |
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Contact: fa @uni-hohenheim.de |
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Species compositions of natural grasslands as affected by variations in rainfall and temperature |
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There are some indications, that recent changes in temperture and rainfall variablitiy may affect the species composition in natural grasslands and that this change may affect the feed stock quality of natural grasslands in the long run. This study will investigate the recent publications in this area, will use either semi-arid Kenyan, humid Argentinean or temperate Chinese grasslands for a case study and describe the changes in species composition observed as well as its consequences for the ecology of those grasslands This is a literature based study, duration 3 months. Begin: any time |
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Contact: fa @uni-hohenheim.de |
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Can the application of Abscisic Acid increase water acquisition potential in plants? |
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Several reports have shown that under certain conditions ABA application to the root can increase the hydraulic conductivity of the root. ABA is known to be a stress hormone normally induced by drought stress. With the hydraulic conductivity increased the root can more easily take up water. This study will verify these reports for a number of contrasting species. C3 and C4 plants, monocots and dicots, annual and perennial plants will be grown hydroponically, ABA will be applied and the water uptake rate will be measured. The experimental part of this study will take 5-8 weeks Begin: any time, preferably in winter |
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Contact: fa @uni-hohenheim.de |
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