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.
2020
Abstract
No abstract has been registered
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Authors
Shiori Koga Heidi Udnes Aamot Anne Kjersti Uhlen Till Seehusen Eva Veiseth-Kent Ingerd Skow Hofgaard Anette Moldestad Ulrike BöckerAbstract
This study aims to understand the environmental factors, focusing on rain and fungal infection, affecting the assembly of glutenin polymers during grain maturation. Spring wheat was grown in the field and grains were sampled from 50% grain moisture until maturity. Grain moisture content, protein content, size of glutenin polymers, the presence of proteases, and the amount of DNA from common wheat pathogenic fungi were analysed. Rain influenced the rate of grain desiccation that occurred parallel to the rate of glutenin polymer assembly. Rapid desiccation contributed to faster glutenin polymer assembly than gradual desiccation. Severe reduction in the glutenin polymer size coincided with increased grain moisture due to rain. Furthermore, increased fungal DNA followed by presence of gluten-degrading proteases was observed in the grain after humid conditions. The presence of gluten-degrading proteases was presumably involved in reducing the size of glutenin polymers in grain. Our study gave new insight into how environmental conditions could be associated with the assembly of glutenin polymers during grain maturation. The results suggest that rain and/or fungal proteases play an important role in reducing the molecular size of glutenin polymers.
Abstract
Perennial versus short term (<3 years) grass vegetation cover is likely to have considerable differences in root density and thus carbon (C) inputs to soil. Carbon inputs are important to maintain soil organic carbon (SOC) and may even increase it. In Norway and Scandinavia, the SOC content in soil is often higher than in other parts of Europe, due to the cold climate and high precipitation (i.e. slower turnover rates for soil organic matter) and a dominance of animal production systems with a large amount of grassland. Here we aimed to evaluate differences in SOC content, down to 60 cm depth, of a long-term grassland (without ploughing for decades) and a short-term grassland (frequently renewed by ploughing) under contrasting climate, soil and management conditions. Quantification of SOC was carried out on three long-term experimental sites on an extended latitude gradient in West and North Norway. The samples were taken from 4 depth increments (0-5, 5-20, 20-40 and 40-60 cm) in treatments that have not been ploughed for at least 43 years, and in treatments that were ploughed every third year until 2011. Preliminary results suggest that there is no significant difference in SOC storage down to 60 cm between long-term and short-term grasslands.
Authors
Trygve S. Aamlid Pia Heltoft Thomsen Tatsiana Espevig Wendy Marie Waalen Anne Mette Dahl Jensen Gudni ThorvaldssonAbstract
No abstract has been registered
Authors
Trygve S. Aamlid Tatsiana Espevig Karin Juul Hesselsøe Wendy Marie Waalen Pia Heltoft Thomsen Sigridur Dalmannsdottir Carl Johan Lönnberg Michelle DaCosta Eric WatkinsAbstract
No abstract has been registered
Authors
Trygve S. Aamlid Tatsiana Espevig Karin Juul Hesselsøe Wendy Marie Waalen Pia Heltoft Thomsen Sigridur Dalmannsdottir C. J. Lönnberg M. DaCosta E R WatkinsAbstract
No abstract has been registered
Authors
Pia Heltoft Thomsen Bjarni Hannesson Karin Normann Per Sørensen Tania Gneist Michelle DaCosta Eric Watkins Karin Juul Hesselsøe Trygve S. Aamlid Tatsiana Espevig Trond Olav Pettersen Wendy Marie Waalen Jan TangsveenAbstract
No abstract has been registered
Authors
Karin Juul Hesselsøe Pia Heltoft Thomsen Gudni Thorvaldsson Anne mette Dahl jensen Tatsiana Espevig Wendy Marie Waalen Trond Olav Pettersen Jan Tangsveen Per Sørensen Tania Gneist Bjarni Hannesson Trygve S. AamlidAbstract
No abstract has been registered
Authors
Trygve S. Aamlid Pia Heltoft Thomsen Tatsiana Espevig Gudni Thorvaldsson Anne Mette Dahl Jensen Karin Juul Hesselsøe Wendy Marie Waalen T. K. Petersen Trond Olav Pettersen Jan Tangsveen P. Sørensen Tania Gneist Bjarni HannessonAbstract
No abstract has been registered