Publikasjoner
NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.
2010
Forfattere
Anne Falk ØgaardSammendrag
In catchments with sensitive water bodies it is of interest to improve P retention in the constructed wetlands by including P adsorbing filters in the end of the wetland. Construction of filters at the outlet of pipe drains is also a possible mitigation option. P retention in filters is expected to be a combined effect of retention of soil particles that is too small for sedimentation in the wetland and adsorption of dissolved P. Here, results from a laboratory study of adsorption of phosphate to four different materials of interest for use as filters in constructed wetlands are presented. The filter materials tested were Maxit Filtralite P, Kemira CFH-12, crushed lime stone and coral sand. In Kemira CFH-12, Fe is the active component (ferric hydroxide granules), whereas in the other three Ca is the active component. The laboratory experiment was performed with four different phosphate concentrations in the range from 50 to 500 µg P/L, three different contact times (30 min, 2h and 6h) and with 1 g filter material to 30 ml solution. The ferric hydroxide granules were superior the other filter materials. At 30 min contact time and 500 µg P/L 88 % of P was adsorbed, whereas at 6 h contact time 99 % of P was adsorbed. Crushed lime stone adsorbed less than 20 % of P in the 500 µg P/L solution. Filtralite P and coral sand showed quite similar ability to adsorb P. At 30 min contact time and 500 µg P/L 35-50 % of P was adsorbed, whereas at 6 h contact time 78-90 % of P was adsorbed.
Forfattere
Anne Falk ØgaardSammendrag
Det er ikke registrert sammendrag
Forfattere
Tor J. JohansenSammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Forfattere
May Bente BrurbergSammendrag
Phytophthora cactorum causes crown rot in strawberry (Fragaria x ananassa Dutch.), which is characterized by wilting and eventually collapse of the plant. An efficient control measure is the use of resistant cultivars, however most commercial cultivars are susceptible to the disease. The aim of our work is to generate basic knowledge about P. cactorum resistance as well as to develop genetic markers that can be used as tools for development of resistant cultivars. The genetic complexity of the octoploid cultivated strawberry, has led to development of the diploid wild strawberry (F. vesca) as a model system for Fragaria. We have identified suitable parents after screening accessions of diploid Fragaria sp. for resistance [1], and generated a mapping population which we are currently characterizing. In order to study the plant-pathogen interaction in detail we have identified and characterized resistance genes from diploid strawberry and effector genes from P. cactorum using different transcriptional analysis techniques; nucleotide-binding site (NBS)-profiling for resistance genes, and suppression subtractive hybridization (SSH) as well as a designed effector-specific differential display (ESDD) for genes involved in pathogenicity. This work is supported by The Research Council of Norway. [1] Eikemo H, Brurberg MB, Davik J (2010). Resistance to Phytophthora cactorum in diploid Fragaria species. HortScience. 45:193-197.
Forfattere
May Bente Brurberg Xiaoren Chen Jahn Davik Håvard Eikemo Inger Martinussen Monica Skogen Yang Hu Abdelhameed Elameen Sonja KlemsdalSammendrag
Phytophthora cactorum causes crown rot in strawberry (Fragaria x ananassa Dutch.), which is characterized by wilting and eventually collapse of the plant. An efficient control measure is the use of resistant cultivars, however most commercial cultivars are susceptible to the disease. The aim of our work is to generate basic knowledge about P. cactorum resistance as well as to develop genetic markers that can be used as tools for development of resistant cultivars. The genetic complexity of the octoploid cultivated strawberry, has led to development of the diploid wild strawberry (F. vesca) as a model system for Fragaria. We have identified suitable parents after screening accessions of diploid Fragaria sp. for resistance [1], and generated a mapping population which we are currently characterizing. In order to study the plant-pathogen interaction in detail we have identified and characterized resistance genes from diploid strawberry and effector genes from P. cactorum using different transcriptional analysis techniques; nucleotide-binding site (NBS)-profiling for resistance genes, and suppression subtractive hybridization (SSH) as well as a designed effector-specific differential display (ESDD) for genes involved in pathogenicity. This work is supported by The Research Council of Norway. [1] Eikemo H, Brurberg MB, Davik J (2010). Resistance to Phytophthora cactorum in diploid Fragaria species. HortScience. 45:193-197.
Forfattere
Venche Talgø Maria Herrero Brita Toppe May Bente Brurberg Robert Thurston Trude L. Slørstad Arne StensvandSammendrag
I 2009 vart det funne tjærefarga flekkar på stammene på fleire lauvtreartar i Stavanger. Slike flekkar er typiske ved angrep av Phytophthora-artar. På spisslønn og bøk vart det stadfesta at skadane skuldast Phytophthora plurivora. Denne skadegjeraren er kjent frå fleire land i Europa, der han vert sett på som ein stor trussel.
Forfattere
Maria Herrero Brita ToppeSammendrag
P. ramorum, en potensiell karanteneskadegjører, ble påvist for første gang i Norge i 2002, på rododendron. Siden den gang er patogenet påvist hvert år, mest på rododendron, men også på andre planter i planteskoler og hagesentre. Sjukdommen er også funnet i grøntanlegg og hager, bl.a. på eik og blåbær, hovedsakelig på Sør-Vestlandet.
Sammendrag
Pseudosoppen P. ramorum er mest kjent i Norge for å forårsake ramorum- greinvisnig hos rododendron og andre prydbusker. Høsten 2009 ble patogenet for første gang også påvist på blåbær i Norge. Blåbærbuskene vokste under infisert rododendron