Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 12 of 12 for “"Terpene synthase"”.
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Implementation of genetic and untargeted metabolomics to study the role of the terpene synthase vir4 from Trichoderma virens in plant-microbe interactions : A thesis submitted in partial fulfilment of the requirements for the Degree of Doctor of Philosophy at Lincoln University
… compounds (VOCs), mostly comprising volatile terpenes. Terpenes are abundantly produced natural products with several biological properties. However, little is known about the role of T. virens volatile terpenes as signalling mediators of the inter-colony communication and modulators of the …
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Identification, Characterization, and Functional Analysis of Terpenoid Specialized Metabolism in Switchgrass (Panicum virgatum) and Carrot (Daucus carota)
… I investigated the metabolism and function of terpenes, the largest class of specialized metabolites, in switchgrass and carrot. Switchgrass (Panicum virgatum L.), a perennial C4 grass of the Tallgrass Prairie, represents an important species in natural and anthropogenic grasslands of North …
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Structure and function of class I diterpene synthase
<p>Abietadiene synthase from Abies grandis (AgAS) has served as a model for investigation of diterpene synthase activity, and here we report its crystal structure at 2.3 Å resolution. This bifunctional enzyme catalyzes both class I (ionization-initiated), as well as class II (protonation initiated) …
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Molecular and Functional Characterization of Terpene Chemical Defense in Arabidopsis Roots in Interaction with the Herbivore Bradysia spp. (fungus gnat)
… we have characterized a root-specific terpene synthase AtTPS08, which is responsible for the constitutive formation of the novel volatile diterpene compound, rhizathalene, in Arabidopsis roots. Rhizathalene synthase is a class I diterpene synthase that has high affinity for the …
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Cell-type specificity and herbivore-induced responses of primary and terpene secondary metabolism in Arabidopsis roots
… the cell-type-specific biosynthesis of volatile terpenes in Arabidopsis roots. Terpenes are the most abundant specialized metabolites in plants and play an important role in plant defense against pathogens or herbivores. Terpene biosynthetic enzyme activities are often coordinated in specific …
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Pheromones in Heliconius butterflies: Chemical ecology, genetics, and behaviour
… for enzymatic activity to identify a novel terpene synthase activity in a gene family not previously known for this role. This finding suggests that terpene synthesis has evolved independently multiple times in insects. The work presented in this thesis is one of the first studies …
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Toward developing pheromone emitting trap crops: Metabolic engineering of an aggregation pheromone for enhanced attraction of Phyllotreta cruciferae
… both males and females. Himachaladiene, a sesquiterpene, has been identified as a key component of the aggregation pheromone of P. cruciferae. In a close relative, Phyllotreta striolata, the compound is synthesized by a two-step pathway with an isoprenyl diphosphate synthase (PsIDS3) making …
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Investigations into the molecular evolution of plant terpene, alkaloid, and urushiol biosynthetic enzymes
… meta-analyses of a well-characterized sesquiterpene synthase family encoding two closely-related but different types of enzymes, using quantitative measures of natural selection on amino-acid positions previously demonstrated as important for neofunctionalization between two terpene synthase …
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Characterisation of phytoalexin accumulation in maize inoculated with Cercospora zeina, the causal organism of grey leaf spot disease
… genes TPS6 and TPS11 (both encoding the protein terpene synthase 6/11, specific for zealexins) and CPPS2 (encoding ent-copalyl diphosphate synthase 2, specific for kauralexins) increased significantly at each time point, reaching a maximum level at T2. Infiltration of maize leaves with a chitosan …
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The Origins of Terpene Infochemicals in Insects: Identification and Evolutionary Analysis of Terpene Synthases in Diverse Lineages
… abundant class of specialized metabolites are terpenes, which are released by many members of taxonomically diverse insect lineages as pheromone and defense compounds. Despite the broad occurrence of terpenes in insects, knowledge of their biosynthesis remains limited compared to that in other …
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Aggregation Pheromone Biosynthesis and Engineering in Plants for Stinkbug Pest Management
… pest on crucifer crops, produces the sesquiterpene, murgantiol, as a male-specific aggregation pheromone. Similarly, the southern green stink bug, Nezara viridula, a generalist pest worldwide on soybean and other crops, releases sesquiterpene cis-/trans-(Z)-α-bisabolene epoxides as …
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Biochemical, Molecular and Functional Analysis of Volatile Terpene Formation in Arabidopsis Roots
… root-specific formation and function of volatile terpenes in the model plant Arabidopsis. As one objective, we have characterized the two root-specific terpene synthases, TPS22 and TPS25. Both enzymes catalyze the formation of several volatile sesquiterpenes with (E)-β-farnesene as the major …