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dc.contributor.advisorBråthen, Kari Anne
dc.contributor.authorMoriana Armendariz, Mikel
dc.date.accessioned2019-11-15T09:50:18Z
dc.date.available2019-11-15T09:50:18Z
dc.date.issued2017-11-15
dc.description.abstractEmpetrum nigrum is a plant common in northern ecosystems with capacity to produce allelopathic compounds, which among other effects inhibit seed establishment and germination of other plants. Some of the most studied compounds regarding this effect are batatasin-III and phenolic acids, among them caffeic acid, which account for a large proportion of the leaf’s biomass. 5 random sites were established following a climatic gradient, and first year shoots were collected during 7 years. The plant’s antioxidant effect was studied as proxy of allelopathy, and shoot length was measured for the possible trade-offs between production of secondary metabolites and growth. The effect of climatic variables on the production of batatasin-III and caffeic acid was assessed, and the plant’s antioxidant activity and shoot growth were studied in accordance to the metabolite production and the weather conditions. Plants had higher concentration of batatasin-III in sites with low temperature, high number of freezing days during winter or both. Nevertheless, a positive relation between temperature and production of batatasin-III was found at the site level. Caffeic acid and antioxidant activity were positively related, however neither the weather variables studied explained their pattern. Shoot length was related to the year air temperature, but not to the production of batatasin-III or caffeic acid. In conclusion, this study shows that an increase of yearly temperature is likely to lead to an increase in batatasin-III production at the site level, but that no effect would happen to the growth of first year shoots. We were not able to find any impact of weather conditions on concentration of caffeic acid and on antioxidant activity.en_US
dc.identifier.urihttps://hdl.handle.net/10037/16668
dc.language.isoengen_US
dc.publisherUiT Norges arktiske universiteten_US
dc.publisherUiT The Arctic University of Norwayen_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2017 The Author(s)
dc.rights.urihttps://creativecommons.org/licenses/by-nc-sa/3.0en_US
dc.rightsAttribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA 3.0)en_US
dc.subject.courseIDBIO-3950
dc.subjectEmpetrum nigrumen_US
dc.subjectallelopathyen_US
dc.subjectbatatasin-IIIen_US
dc.subjectcaffeic aciden_US
dc.subjectantioxidant activityen_US
dc.subjectplant growthen_US
dc.subjectweather effectsen_US
dc.subjectVDP::Mathematics and natural science: 400::Zoology and botany: 480::Plant physiology: 492en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Plantefysiologi: 492en_US
dc.titleYearly variation in allelopathic compound production along a climatic gradient. A case of study of Empetrum nigrumen_US
dc.typeMaster thesisen_US
dc.typeMastergradsoppgaveen_US


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Attribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA 3.0)
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