@phdthesis{Kuhlmann2009,
  author    = {Kuhlmann, Franziska},
  title     = {The influence of ultraviolet radiation on plant-insect interactions},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-39608},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year      = {2009},
  abstract  = {Plants must respond to multiple stimuli in a natural environment. Therefore they need the ability to rapidly reorganise and specifically build up appropriate metabolites to adapt to their environment. Abiotic cues, such as ambient solar radiation, influence the next trophic level directly, but also an altered plant composition triggered by these environmental cues can have an effect on the behaviour of herbivores. The aim of this study was to test effects of the important ultraviolet (UV) radiation on plants and on plant-insect interactions using multi-level investigations. The focus was on the conduction of controlled experiments with broccoli plants in highly engineered greenhouses covered with innovative materials, which only differed in their UV-B transmission. For the first time in this controlled environment the plant-mediated UV-B effects on phloem-feeding aphids were studied. Broccoli plants (Brassica oleracea L. convar. botrytis, Brassicaceae) were under filter tents either exposed to (inclusion, +UV) or not exposed to (exclusion, -UV) UV-A / UV-B radiation. In greenhouses covered with new, innovative materials transmitting high (80\%), medium (23\%) or low (4\%) levels of ambient solar UV-B radiation, in particular the influence of UV-B radiation on broccoli was examined. Plants respond highly specific to environmental stimuli such as UV-B radiation and herbivory. UV-B radiation has a strong impact on the plants' architecture and flavonoid contents, which can in turn influence plant-insect interactions. Phloem-feeding aphids can be negatively affected by UV-B mediated plant changes. However, a direct effect of UV radiation on the behaviour of herbivores is also evident. Mainly the number, composition and quality of herbivorous species as well as an exceeding of a certain infestation threshold determine the mode of plant changes. In conclusion, UV-B radiation has the potential to harden plants against herbivores and simultaneously increases the concentrations of valuable secondary metabolites for human nutrition in important crop species such as broccoli.},
  subject      = {ultraviolette Strahlung},
  language  = {en}
}
@phdthesis{TraversMartin2007,
  author    = {Travers-Martin, Nora Verena},
  title     = {The role of the glucosinolate-myrosinase system for the interaction of Brassicaceae with the turnip sawfly Athalia rosae(L.)},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-25335},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year      = {2007},
  abstract  = {Brassicaceae and a few related plant families are characterized by possession of the glucosinolate-myrosinase system. Glucosinolates are amino-acid derived allelochemicals which are hydrolysed upon tissue damage by myrosinase enzymes to produce various degradation products which can be toxic for generalist insects. The larvae of the crucifer-specialist Athalia rosae, the turnip sawfly, sequester glucosinolates into their haemolymph. The role of the glucosinolate-myrosinase system for the interaction of the turnip sawfly with Brassicaceae was examined in this study from two different perspectives: variation within individual plants and between plant species. The plant responses to the feeding by herbivores and the short-term effects this induction had on insect behaviour were investigated in white mustard. Furthermore, plants can use multiple defences. Hence correlations of glucosinolates and myrosinase activities with other defences and nutritional quality and their long-term effects on the development of the insects were investigated in seven different plant species.},
  subject      = {Glucosinolate},
  language  = {en}
}