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.
2024
Abstract
No abstract has been registered
Abstract
No abstract has been registered
Authors
Theresa Weigl Jorunn Børve Emily Follett Ingunn Øvsthus Carl Gunnar Fossdal Hanne Larsen Siv Fagertun RembergAbstract
https://ehc.usamv.ro/wp-content/uploads/2024/05/S10-Book-of-Abstracts.pdf The mid-early ripening cultivar, 'Summerred‘, is popular among consumers and widely grown in Norway. However, 'Summerred‘ fruit is prone to rapid softening and development of senescence-related disorders, especially senescent breakdown. Calcium can have a significant role in maintaining firmness and delaying senescence of fruits. In a two-year study, foliar application of calcium chloride (CaCl2) was conducted six times, with varying weather conditions between the growing seasons. Fruit was harvested at optimal commercial maturity and stored at 4 °C for either six or nine weeks, followed by simulated shelf-life conditions at 20 °C. Ethylene levels were monitored during storage to detect ripening discrepancies. At harvest, CaCl2-treated fruit exhibited significantly lower ethylene production compared to untreated fruit, although no differences were observed during the end of the storage period. Senescent breakdown showed significant variability between the two seasons, with an incidence of up to 15 % in the first season and nearly no incidence in the second season. Senescent breakdown increased with storage length but was not affected by foliar CaCl2 application. Real-time PCR analysis of fruit flesh samples revealed increased expression of polygalacturonase and β-galactosidases genes after storage, indicating their involvement in apple softening. Notably, there were no differences in gene expression between CaCl2-treated and untreated fruit after storage. Expression patterns of genes involved in ethylene biosynthesis at harvest were different between the two seasons. Higher expression was observed in the year when more disorder development occurred, indicating advanced maturity at harvest. There were no significant differences in Streif index between the two years.
Authors
Dalphy Ondine Camira HarteveldAbstract
No abstract has been registered
Abstract
No abstract has been registered
Authors
Neringa Rasiukevičiūtė Alma Valiuškaitė Juozas Lanauskas Larissa Gustavsson Jonas Skytte af Sätra Arne Stensvand Jorunn Børve Tuuli Haikonen Marja Rantanen Petteri Karisto Nina Sevelius Priit Põldma Evelyn Loit Matis Moks Ulvi MoorAbstract
No abstract has been registered
Abstract
No abstract has been registered
Abstract
Faba beans and other cool climate legumes are well suited for cultivation in Vestfold and Østfold in the Norwegian south-east because of their requirement for long growing seasons and are desired due to their high protein content and beneficial biological nitrogen fixation properties. Including such crops in rotations is an advantage due to the subsequent reduction in costs and CO2 emissions from fertilizer production. Additionally, their presence in rotations could be a tool for improving integrated pest management in cereals by reducing disease pressure. A challenge specifically related to the management of faba bean crops is the disease chocolate spot (cs) caused by pathogen species in the genus Botrytis, typically Botrytis fabae Sardiña. and Botrytis cinerea Pers.: Fr. Management of chocolate spot epidemics is limited by the number of fungicides available to commercial growers, and the development of fungicide resistance is a challenge currently being investigated. A randomized factorial split-plot field trial with 3 replicates was set up in at Vollebekk research farm in Ås in the spring of 2023 and separated by early and late varieties. For each section three seed rates, two cultivars and four fungicide treatments were used. The severity of disease was scored, the developmental stages of the crops were recorded, and the resulting yield was dried and weighed. By collecting diseased leaves and making single spore isolates, the pathogens available in the field were sequenced using a NEP2 primer and tested against the active compounds in the currently utilized fungicide Signum®. Causal organisms were B. fabae and B. cinerea, there was no relationship between severity and fungal species, and no noteworthy signs of resistance to fungicide compounds were found. Results showed significant differences in chocolate spot levels between treated and untreated plots in early and late varieties, and the severity was lowest in plots treated with Elatus® Era, a fungicide currently unavailable for use in faba beans. Yield and chocolate spot correlated negatively, and the yield was highest in plots treated after the first symptoms appeared. The difference in yield between this treatment and untreated plots was significant in late varieties. Canopy density measured by sowing rate had no significant effect on disease severity in either early or late varieties, although the correlation was positive in both.
Abstract
No abstract has been registered
Authors
Andrea FickeAbstract
No abstract has been registered