Carl Gunnar Fossdal
Avdelingsleder/forskningssjef
(+47) 481 46 583
carl.gunnar.fossdal@nibio.no
Sted
Ås - Bygg H8
Besøksadresse
Høgskoleveien 8, 1433 Ås
Biografi
Jeg forsker på klimatilpasning hos skogtrær, resistens mot skadesopp, sopp gener/enzym involvert i råte og mikrobiom studier, med et faglig fokus på å forstå de molekylære mekanismene som styrer disse biologiske prosessene. Jeg har jobbet i NIBIO siden 1995. I 1989 ble jeg Cand. Mag med hovedvekt på kjemiske fag ved Universitetet i Oslo. Senere Cand. Scient. i bioteknologi ved Universitetet i Oslo i 1991. I 1999, tok jeg Dr. Scient. graden innen Bioteknologi ved Norges landbrukshøgskole (NLH). Professor kvalifisert innen molekylærbiologi i 2006. Fra 2016 til 2019 var jeg forskningssjef og leder for Avdeling Skoghelse og siden 2019 har jeg vært forskningssjef og leder for Avdeling Molekylær plantebiologi i Divisjon for bioteknologi og plantehelse i NIBIO. Jeg har jobbet som prosjektleder på flere forskningsprosjekter med tema relatert til trærs forsvar mot soppsykdommer, gener som koder for vednedbrytende enzyme og med epigenetiske mekanismer betydning for planters evne til å tilpasse seg endringer i miljøet. Jeg har vært og er involvert i en rekke større forskningsprosjekter finansiert av FRIMEDBIO programmet til Norges forskningsråd, inkludert et pågående TOPPFORSK prosjekt innen fagfeltet epigenetikk.
Forfattere
Theresa Weigl Jorunn Børve Emily Follett Ingunn Øvsthus Carl Gunnar Fossdal Hanne Larsen Siv Fagertun RembergSammendrag
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 6 or 9 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 at 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. Senescent breakdown increased with storage duration but was unaffected 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 with greater disorder development, indicating greater maturity at harvest. There were no significant differences in the Streif index between the two years.
Forfattere
Trygve S. Aamlid Sigridur Dalmannsdottir Kristoffer Herland Hellton Marit Jørgensen Ievina Sturite Carl Gunnar Fossdal Akhil Reddy Pashapu Mallikarjuna Rao Kovi Helga Amdahl Odd Arne RognliSammendrag
Det er ikke registrert sammendrag
Forfattere
Theresa Weigl Jorunn Børve Melissa Magerøy Hanne Larsen Carl Gunnar Fossdal Siv Fagertun RembergSammendrag
The physiological disorder soft scald may cause losses in apple fruit storage. This study aimed at understanding the interplay between fruit maturity at harvest and storage temperature on soft scald development in the susceptible cultivar ‘Red Aroma’. Fruit harvested late and subsequently stored at −0.5 °C developed the significantly highest soft scald incidence. Overall ethylene and CO2-production was reduced in late harvested fruit stored at −0.5 °C, while fruit from the early harvest showed a cold-induced ethylene increase under the same storage conditions, suggesting an active cold-acclimation response. Clustering of RNA sequencing data and overrepresentation analysis revealed that transcripts involved in cell wall modification, ripening-associated signaling, antioxidant defense system and secondary metabolism were upregulated in late harvested fruit at harvest as well as soft scald-affected fruit after storage. In contrast, early harvested fruit at harvest and disorder-free fruit after storage showed higher expression of transcripts associated with abiotic stress resistance, such as leucine-rich repeat receptor-like kinases, protein kinases with tetratricopeptide repeat domains, and auxin response factor, indicating a potential link between early maturity and enhanced cold tolerance in ‘Red Aroma’ apple fruit.