Publications
NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.
2010
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Abstract
The effects of genetically modified (GM) maize (Zea mays L.) expressing the Bacillus thuringiensis Berliner Cry1Fa2 protein (Bt) and phosphinothricin or glyphosate herbicide tolerance on soil chemistry (organic matter, N, P, K and pH), compared with non-GM controls, were assessed in field and pot experiments. In the field experiment, NH4+ was significantly higher in soil under the crop modified for herbicide tolerance compared to the control (mean values of 11 and 9.6 mg N/kg respectively) while P was significantly higher in soil under the control compared to under the GM crop (mean values of 6.9 and 6.4 dg P/kg, respectively). No significant differences were found as a result of growing Bt/herbicide tolerant maize. In the pot experiment, using soils from three sites (Gongzhuling, Dehui and Huadian), significant effects of using Bt maize instead of conventional maize were found for all three soils. In the Gongzhuling soil, P was significantly higher in soil under the control compared to under the GM crop (mean values of 4.8 and 4.0 dg P/kg, respectively). For the Dehui soil, the pH was significantly higher in soil under the control compared to under the GM crop (mean values for {H+} of 1.1 and 2.4 μM for the control and the GM crop respectively). In the Huadian soil, organic matter and total N were both higher in soil under the GM crop than under the control. For organic matter, the mean values were 3.0 and 2.9% for the GM crop and the control, respectively, while for total nitrogen the mean values were 2.02 and 1.96‰ for the GM crop and the control respectively. Our results indicate that growing GM crops instead of conventional crops may alter soil chemistry, but not greatly, and that effects will vary with both the specific genetic modification and the soil.
Authors
Karen Refsgaard Thomas G. JohnsonAbstract
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Authors
J Santala O Samuilova Asko Hannukkala S Latvala H Kortemaa U Beuch A Kvarnheden Per Persson K Topp Kari Ørstad Carl Jonas Jorge Spetz S. L. Nielsen HG Kirk M Budziszewska P Wieczorek A Obrepalska-Steplowska H Pospieszny A Kryszczuk J Sztangret-Wisniewska Z Yin M Chrzanowska E Zimnoch-Guzowska E Jackeviciene L Taluntyte N Pupola J Mihailova I Lielmane L Jarvekulg K Kotkas E Rogozina A Sozonov I Tikhonovich P Horn I Broer S Kuusiene J Staniulis JG Uth G Adam JPT ValkonenAbstract
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Authors
Inge M. Hanssen Rick Mumford Dag-Ragnar Blystad Isabel Cortez Beata Hasiów-Jaroszewska Dimitrinka Hristova Israel Pagán Ana-Maria Pereira Jeff Peters Henryk Pospieszny Maja Ravnikar Ineke Stijger Laura Tomassoli Christina Varveri René van der Vlugt Steen Lykke NielsenAbstract
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Abstract
In Norway, Nordmann fir (Abies nordmanniana) and subalpine fir (A. lasiocarpa) are the dominant Christmas tree species, and noble fir (A. procera) the dominant bough plant species. To determine if fungi found to cause diseases on fir in Norway might be seed borne, samples from twelve seed lots, including Nordmann fir from Austria, Georgia and Russia, subalpine fir from Canada and Norway and noble fir from Norway were tested using agar plate methods (PDA and WA). The most important finding was that Sydowia polyspora was present on seed from all firs from all countries (nine samples infected, 0.5 - 85 % infected seeds). Recently, it has been demonstrated in Norway that this fungus is the cause of current season needle necrosis (CSNN), which is considered a major disease in the Christmas tree and bough production both in Europe and USA. Sirococcus coniguenus was found in a Norwegian A. procera seed lot (31% infected seeds), which to our knowledge is the first report of this pathogen on fir seeds. Caloscypha fulgens was detected on subalpine fir seed from Canada. In addition the following fungal genera were detected: Acremoniella, Acremonium, Alternaria, Aspergillus, Botrytis, Chaetomium, Cladosporium, Diaphorte, Dictyopolyschema, Epicoccum, Fusarium, Genicularia, Mucor, Neonectria, Penicillium, Phoma, Rhizopus, Sordaria, Trichoderma, Trichothecium, and an unidentified fungus.
Authors
Amy Marie Patrin Oen Magnus Sparrevik David Nicholas Barton Sekhar Udaya Nagothu Gerald Jan Ellen Gijs D. Breedveld Jens Skei Adriaan SlobAbstract
No abstract has been registered