Anne-berit Wold - Academia.edu (original) (raw)

Papers by Anne-berit Wold

Research paper thumbnail of Effects of organic and waste-derived fertilizers on yield, nitrogen and glucosinolate contents, and sensory quality of broccoli (Brassica oleracea L. var. italica)

Journal of agricultural and food chemistry, Jan 9, 2015

Organic vegetable production attempts to pursue multiple goals concerning influence on environmen... more Organic vegetable production attempts to pursue multiple goals concerning influence on environment, production resources and human health. In areas with limited availability of animal manure, there is a need for considering various off-farm nutrient resources for such production. Different organic and waste-derived fertilizer materials were used for broccoli production at two latitudes (58° and 67°) in Norway during two years. The fertilizer materials were applied at two rates of total N (80 kg ha-1 and 170 kg ha-1) and compared with mineral fertilizer (170 kg ha-1) and no fertilizer. Broccoli yield was strongly influenced by fertilizer materials (algae meal<unfertilized control<sheep manure<extruded shrimp shell<anaerobically digested food waste<mineral fertilizer). Yield, but not glucosinolate contents, was linearly correlated with estimated potentially plant-available N. However, extruded shrimp shell and mineral NPK fertilizer gave higher glucosinolate contents th...

Research paper thumbnail of Effects of Post-Flowering Environmental Variation along an Altitudinal Gradient on Chemical Composition of 'Glen Ample' Red Raspberry (Rubus idaeus L.)

The effects of post-flowering environmental conditions on chemical composition of 'Glen Ample... more The effects of post-flowering environmental conditions on chemical composition of 'Glen Ample' red raspberry were studied by growing plants at three altitudes (128, 340 and 670 m a. s. l.) at the same latitude in central South Norway. Due to day-to-day variation in temper-ature and precipitation, the average climatic effects over the entire harvest period were evened out and reduced in magnitude, thus complicating the analysis of their effects. However, correlation of fruit chemical composition for the individual weekly harvests with temperature and precipitation data for the current and preceding weeks, revealed significant effects of weather conditions during fruit maturation. At the lower temperature range established in the present experiment, fruit quality attributes such as dry matter, soluble solids, titratable acids, total monomeric antho-cyanins, and total phenolic concentration were all pos-itively correlated with increasing temperature during the final two weeks o...

Research paper thumbnail of Diurnal and light regulation

Glucosinolates are a major class of sulphur-containing secondary metabolites involved in plant de... more Glucosinolates are a major class of sulphur-containing secondary metabolites involved in plant defence against pathogens. Recently many regulatory links between glucosinolate biosynthesis and sulphate assimilation were established. Since sulphate assimilation undergoes diurnal rhythm and is light regulated, this study analysed whether the same is true for glucosinolate biosynthesis. The levels of glucosinolates and glutathione were found to be higher during the day than during the night. This agreed with variation in sulphate uptake as well as activity of the key enzyme of the sulphate assimilation pathway, adenosine 5'-phosphosulphate reductase. Correspondingly, the flux through sulphate assimilation was higher during the day than during the night, with the maximum flux through primary assimilation preceding maximal incorporation into glucosinolates. Prolonged darkness resulted in a strong reduction in glucosinolate content. Re-illumination of such dark-adapted plants induced accumulation of mRNA for many genes of glucosinolate biosynthesis, leading to increased glucosinolate biosynthesis. The light regulation of the glucosinolate synthesis genes as well as many genes of primary sulphate assimilation was controlled at least partly by the LONG HYPOCOTYL5 (HY5) transcription regulator. Thus, glucosinolate biosynthesis is highly co-regulated with sulphate assimilation.

Research paper thumbnail of Post-flowering photoperiod has marked effects on fruit chemical composition in red raspberry ( Rubus idaeus )

Annals of Applied Biology, 2014

The effect of photoperiod on nutritional quality and chemical composition of 'Glen Ample' red ras... more The effect of photoperiod on nutritional quality and chemical composition of 'Glen Ample' red raspberry has been studied under controlled environment conditions. Long day (LD) conditions during fruit growth and maturation significantly increased fruit concentrations of ascorbic acid, total phenolics, organic acids such as malic, quinic and ellagic acids, as well as the ferric reducing activity power, while reducing the concentrations of soluble solids, sucrose and the sugar/acid ratio. The levels of total anthocyanin and oxalic acid were not significantly affected by photoperiod whereas semi-quantitative analysis indicated a significant increase in the levels of some ellagitannins. The same responses were found whether LD was established by day-length extension with low-intensity light or by night interruption, thus demonstrating that the observed changes in nutritional quality of raspberry fruit was mediated through specific photoperiodic mechanism(s) independently of the daily light energy supply.

Research paper thumbnail of Vitamin C in broccoli (Brassica oleracea L. var. italica) flower buds as affected by postharvest light, UV-B irradiation and temperature

Postharvest Biology and Technology, 2014

ABSTRACT In this study, the changes in vitamin C, l-ascorbic acid (AA) and l-dehydroascorbic acid... more ABSTRACT In this study, the changes in vitamin C, l-ascorbic acid (AA) and l-dehydroascorbic acid (DHA) levels in broccoli flower buds were examined during pre-storage and storage periods, simulating refrigerated transport with wholesale distribution and retail, respectively. Broccoli heads were pre-stored for 4 or 7 days at 0 °C or 4 °C in the dark and then stored for 3 days at 10 °C or 18 °C. During storage the broccoli heads were exposed for 12 h per day to three different levels of visible light (13, 19 or 25 μmol m−2 s−1) or a combination of visible light (19 μmol m−2 s−1) and UV-B irradiation (20 kJ m−2 d−1), or they were stored in the dark. The vitamin C content in broccoli flower buds during storage was significantly affected by pre-storage period and temperature. Higher vitamin C levels in flower buds after storage were observed for broccoli heads pre-stored for 4 days or at 0 °C as compared to those pre-stored for 7 days or at 4 °C. Storage temperature also affected vitamin C in broccoli flower buds, with higher levels observed for broccoli stored at 10 °C than at 18 °C. Hence, vitamin C in broccoli flower buds was demonstrated to decrease together with increasing pre-storage period, pre-storage temperature and storage temperature. AA in broccoli flower buds was influenced mainly by storage temperature and to a minor extent by pre-storage temperature. The DHA level and DHA/AA ratio were stable in flower buds of broccoli pre-stored for 7 days, whereas increasing tendencies for both DHA level and ratio were observed after pre-storage for 4 days. These results indicate a shift in the ascorbate metabolism in broccoli flower buds during storage at low temperatures, with its higher rate observed for broccoli pre-stored for shorter time. There were no effects of the light and UV-B irradiation treatments on vitamin C, AA and DHA levels in broccoli flower buds.

Research paper thumbnail of Diurnal and light regulation of sulphur assimilation and glucosinolate biosynthesis in Arabidopsis

Journal of Experimental Botany, 2013

Glucosinolates are a major class of sulphur-containing secondary metabolites involved in plant de... more Glucosinolates are a major class of sulphur-containing secondary metabolites involved in plant defence against pathogens. Recently many regulatory links between glucosinolate biosynthesis and sulphate assimilation were established. Since sulphate assimilation undergoes diurnal rhythm and is light regulated, this study analysed whether the same is true for glucosinolate biosynthesis. The levels of glucosinolates and glutathione were found to be higher during the day than during the night. This agreed with variation in sulphate uptake as well as activity of the key enzyme of the sulphate assimilation pathway, adenosine 5'-phosphosulphate reductase. Correspondingly, the flux through sulphate assimilation was higher during the day than during the night, with the maximum flux through primary assimilation preceding maximal incorporation into glucosinolates. Prolonged darkness resulted in a strong reduction in glucosinolate content. Re-illumination of such dark-adapted plants induced accumulation of mRNA for many genes of glucosinolate biosynthesis, leading to increased glucosinolate biosynthesis. The light regulation of the glucosinolate synthesis genes as well as many genes of primary sulphate assimilation was controlled at least partly by the LONG HYPOCOTYL5 (HY5) transcription regulator. Thus, glucosinolate biosynthesis is highly co-regulated with sulphate assimilation.

Research paper thumbnail of Colour of post-harvest ripened and vine ripened tomatoes (Lycopersicon esculentum Mill.) as related to total antioxidant capacity and chemical composition

International Journal of Food Science and Technology, 2004

Greenhouse grown tomatoes (cvs ÔDurintaÕ, ÔFavoritaÕ and ÔLibertoÕ) were harvested green and vine... more Greenhouse grown tomatoes (cvs ÔDurintaÕ, ÔFavoritaÕ and ÔLibertoÕ) were harvested green and vine ripe. Colour measurements and chemical analyses were performed on green, postharvest red and vine-ripe fruits. Partial least square (PLS) regression was applied to predict the ferric reducing ability of plasma (FRAP) by means of colour measurements (L*, a* and b*). The PLS showed that 78% of the variation in colour were able to predict 74% of the variation in FRAP value. Chemical variables and colour variables together were able to predict 88% of the variation in FRAP by means of PLS regression. Linear regression showed a high negative correlation between high values of L*, b* and FRAP, and a high positive correlation between titratable acidity, a*, hue, a*/b*, soluble solids, vitamin C, dry matter and FRAP values. Thus, colour measurements of intact tomatoes can be used as a non-destructive method to assess total antioxidant capacity of tomatoes.

Research paper thumbnail of Quality and chemical composition of ten red raspberry (Rubus idaeus L.) genotypes during three harvest seasons

Food Chemistry, 2014

Colour and chemical composition of fruits of 10 red raspberry genotypes grown in Nordic climate d... more Colour and chemical composition of fruits of 10 red raspberry genotypes grown in Nordic climate during three harvest seasons were studied. The main phenolic compounds in the fruits were ellagitannins and anthocyanins, contributing 57% and 42% to the quantified phenolic compounds, respectively. Cyanidin-3-sophoroside was the most abundant anthocyanin (61%). All quality parameters were significantly affected by genotype. The genotypes could be categorised into three groups. &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;Veten&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39; and &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;RU984 06038&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39; were characterised by high concentrations of flavonoids, i.e., anthocyanins and quercetin glycosides, and dark red colour. &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;Octavia&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;, &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;Glen Magna&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;, &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;RU004 03067&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;, &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;Glen Ample&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39; and &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;RU974 07002&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39; were characterised by light colour, high titratable acids and low flavonoid concentrations. &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;Malling Hestia&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;, &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;RU024 01003&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39; and &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;RU004 04095&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39; had high content of dry matter, soluble solids, ascorbic acid and ellagic acid containing compounds, in addition to high hue and chroma values. All quality parameters, except ascorbic acid and lambertianin C, varied significantly between harvest seasons. The lowest seasonal variation in fruit quality was observed in &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;RU024 01003&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39; and &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;Glen Ample&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39; and the highest &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;RU004 03067&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39; and &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;Glen Magna&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;.

Research paper thumbnail of Effects of ripeness and cultivar on chemical composition of strawberry (Fragaria×ananassa Duch.) fruits and their suitability for jam production as a stable product at different storage temperatures

Food Chemistry, 2014

Effects of ripeness (nearly ripe, ripe, fully ripe) and cultivar ('Blink', 'Polka' and 'Senga Sen... more Effects of ripeness (nearly ripe, ripe, fully ripe) and cultivar ('Blink', 'Polka' and 'Senga Sengana') on colour and chemical composition of strawberry fruits and their suitability for jam production, evaluated as stability during storage at 4 and 20°C for 3 and 6 months, were investigated. Quality traits of fruits and jams were significantly affected by both ripeness stage and cultivar. However, after 6 months of storage, particularly at 20°C, the effects of fruit ripeness and cultivar were considerably reduced. During jam storage, anthocyanins, ascorbic acid, chroma and hue were least stable in jams made from the least ripe fruits. Quality traits in jams made from 'Senga Sengana' were best preserved during storage, while quality and chemical composition in jams made from 'Blink' changed the most. In conclusion, fully ripe fruits were best suited for jam processing. Storage at low temperature was preferable and 'Senga Sengana' was the most and 'Blink' the least suitable cultivar for processing.

Research paper thumbnail of Variation in quality parameters between and within 14 Nordic tree fruit and berry species

Acta Agriculturae Scandinavica, Section B - Soil & Plant Science, 2012

Research paper thumbnail of EFFECTS OF PREHARVEST FACTORS ON BERRY QUALITY

X International Symposium on Vaccinium and Other Superfruits, 2014

We also present results from a series of perennial field trials in which berry quality attributes... more We also present results from a series of perennial field trials in which berry quality attributes are related to annual variation in important climatic factors.

Research paper thumbnail of Effects of organic and waste-derived fertilizers on yield, nitrogen and glucosinolate contents, and sensory quality of broccoli (Brassica oleracea L. var. italica)

Journal of agricultural and food chemistry, Jan 9, 2015

Organic vegetable production attempts to pursue multiple goals concerning influence on environmen... more Organic vegetable production attempts to pursue multiple goals concerning influence on environment, production resources and human health. In areas with limited availability of animal manure, there is a need for considering various off-farm nutrient resources for such production. Different organic and waste-derived fertilizer materials were used for broccoli production at two latitudes (58° and 67°) in Norway during two years. The fertilizer materials were applied at two rates of total N (80 kg ha-1 and 170 kg ha-1) and compared with mineral fertilizer (170 kg ha-1) and no fertilizer. Broccoli yield was strongly influenced by fertilizer materials (algae meal<unfertilized control<sheep manure<extruded shrimp shell<anaerobically digested food waste<mineral fertilizer). Yield, but not glucosinolate contents, was linearly correlated with estimated potentially plant-available N. However, extruded shrimp shell and mineral NPK fertilizer gave higher glucosinolate contents th...

Research paper thumbnail of Effects of Post-Flowering Environmental Variation along an Altitudinal Gradient on Chemical Composition of 'Glen Ample' Red Raspberry (Rubus idaeus L.)

The effects of post-flowering environmental conditions on chemical composition of 'Glen Ample... more The effects of post-flowering environmental conditions on chemical composition of 'Glen Ample' red raspberry were studied by growing plants at three altitudes (128, 340 and 670 m a. s. l.) at the same latitude in central South Norway. Due to day-to-day variation in temper-ature and precipitation, the average climatic effects over the entire harvest period were evened out and reduced in magnitude, thus complicating the analysis of their effects. However, correlation of fruit chemical composition for the individual weekly harvests with temperature and precipitation data for the current and preceding weeks, revealed significant effects of weather conditions during fruit maturation. At the lower temperature range established in the present experiment, fruit quality attributes such as dry matter, soluble solids, titratable acids, total monomeric antho-cyanins, and total phenolic concentration were all pos-itively correlated with increasing temperature during the final two weeks o...

Research paper thumbnail of Diurnal and light regulation

Glucosinolates are a major class of sulphur-containing secondary metabolites involved in plant de... more Glucosinolates are a major class of sulphur-containing secondary metabolites involved in plant defence against pathogens. Recently many regulatory links between glucosinolate biosynthesis and sulphate assimilation were established. Since sulphate assimilation undergoes diurnal rhythm and is light regulated, this study analysed whether the same is true for glucosinolate biosynthesis. The levels of glucosinolates and glutathione were found to be higher during the day than during the night. This agreed with variation in sulphate uptake as well as activity of the key enzyme of the sulphate assimilation pathway, adenosine 5'-phosphosulphate reductase. Correspondingly, the flux through sulphate assimilation was higher during the day than during the night, with the maximum flux through primary assimilation preceding maximal incorporation into glucosinolates. Prolonged darkness resulted in a strong reduction in glucosinolate content. Re-illumination of such dark-adapted plants induced accumulation of mRNA for many genes of glucosinolate biosynthesis, leading to increased glucosinolate biosynthesis. The light regulation of the glucosinolate synthesis genes as well as many genes of primary sulphate assimilation was controlled at least partly by the LONG HYPOCOTYL5 (HY5) transcription regulator. Thus, glucosinolate biosynthesis is highly co-regulated with sulphate assimilation.

Research paper thumbnail of Post-flowering photoperiod has marked effects on fruit chemical composition in red raspberry ( Rubus idaeus )

Annals of Applied Biology, 2014

The effect of photoperiod on nutritional quality and chemical composition of 'Glen Ample' red ras... more The effect of photoperiod on nutritional quality and chemical composition of 'Glen Ample' red raspberry has been studied under controlled environment conditions. Long day (LD) conditions during fruit growth and maturation significantly increased fruit concentrations of ascorbic acid, total phenolics, organic acids such as malic, quinic and ellagic acids, as well as the ferric reducing activity power, while reducing the concentrations of soluble solids, sucrose and the sugar/acid ratio. The levels of total anthocyanin and oxalic acid were not significantly affected by photoperiod whereas semi-quantitative analysis indicated a significant increase in the levels of some ellagitannins. The same responses were found whether LD was established by day-length extension with low-intensity light or by night interruption, thus demonstrating that the observed changes in nutritional quality of raspberry fruit was mediated through specific photoperiodic mechanism(s) independently of the daily light energy supply.

Research paper thumbnail of Vitamin C in broccoli (Brassica oleracea L. var. italica) flower buds as affected by postharvest light, UV-B irradiation and temperature

Postharvest Biology and Technology, 2014

ABSTRACT In this study, the changes in vitamin C, l-ascorbic acid (AA) and l-dehydroascorbic acid... more ABSTRACT In this study, the changes in vitamin C, l-ascorbic acid (AA) and l-dehydroascorbic acid (DHA) levels in broccoli flower buds were examined during pre-storage and storage periods, simulating refrigerated transport with wholesale distribution and retail, respectively. Broccoli heads were pre-stored for 4 or 7 days at 0 °C or 4 °C in the dark and then stored for 3 days at 10 °C or 18 °C. During storage the broccoli heads were exposed for 12 h per day to three different levels of visible light (13, 19 or 25 μmol m−2 s−1) or a combination of visible light (19 μmol m−2 s−1) and UV-B irradiation (20 kJ m−2 d−1), or they were stored in the dark. The vitamin C content in broccoli flower buds during storage was significantly affected by pre-storage period and temperature. Higher vitamin C levels in flower buds after storage were observed for broccoli heads pre-stored for 4 days or at 0 °C as compared to those pre-stored for 7 days or at 4 °C. Storage temperature also affected vitamin C in broccoli flower buds, with higher levels observed for broccoli stored at 10 °C than at 18 °C. Hence, vitamin C in broccoli flower buds was demonstrated to decrease together with increasing pre-storage period, pre-storage temperature and storage temperature. AA in broccoli flower buds was influenced mainly by storage temperature and to a minor extent by pre-storage temperature. The DHA level and DHA/AA ratio were stable in flower buds of broccoli pre-stored for 7 days, whereas increasing tendencies for both DHA level and ratio were observed after pre-storage for 4 days. These results indicate a shift in the ascorbate metabolism in broccoli flower buds during storage at low temperatures, with its higher rate observed for broccoli pre-stored for shorter time. There were no effects of the light and UV-B irradiation treatments on vitamin C, AA and DHA levels in broccoli flower buds.

Research paper thumbnail of Diurnal and light regulation of sulphur assimilation and glucosinolate biosynthesis in Arabidopsis

Journal of Experimental Botany, 2013

Glucosinolates are a major class of sulphur-containing secondary metabolites involved in plant de... more Glucosinolates are a major class of sulphur-containing secondary metabolites involved in plant defence against pathogens. Recently many regulatory links between glucosinolate biosynthesis and sulphate assimilation were established. Since sulphate assimilation undergoes diurnal rhythm and is light regulated, this study analysed whether the same is true for glucosinolate biosynthesis. The levels of glucosinolates and glutathione were found to be higher during the day than during the night. This agreed with variation in sulphate uptake as well as activity of the key enzyme of the sulphate assimilation pathway, adenosine 5'-phosphosulphate reductase. Correspondingly, the flux through sulphate assimilation was higher during the day than during the night, with the maximum flux through primary assimilation preceding maximal incorporation into glucosinolates. Prolonged darkness resulted in a strong reduction in glucosinolate content. Re-illumination of such dark-adapted plants induced accumulation of mRNA for many genes of glucosinolate biosynthesis, leading to increased glucosinolate biosynthesis. The light regulation of the glucosinolate synthesis genes as well as many genes of primary sulphate assimilation was controlled at least partly by the LONG HYPOCOTYL5 (HY5) transcription regulator. Thus, glucosinolate biosynthesis is highly co-regulated with sulphate assimilation.

Research paper thumbnail of Colour of post-harvest ripened and vine ripened tomatoes (Lycopersicon esculentum Mill.) as related to total antioxidant capacity and chemical composition

International Journal of Food Science and Technology, 2004

Greenhouse grown tomatoes (cvs ÔDurintaÕ, ÔFavoritaÕ and ÔLibertoÕ) were harvested green and vine... more Greenhouse grown tomatoes (cvs ÔDurintaÕ, ÔFavoritaÕ and ÔLibertoÕ) were harvested green and vine ripe. Colour measurements and chemical analyses were performed on green, postharvest red and vine-ripe fruits. Partial least square (PLS) regression was applied to predict the ferric reducing ability of plasma (FRAP) by means of colour measurements (L*, a* and b*). The PLS showed that 78% of the variation in colour were able to predict 74% of the variation in FRAP value. Chemical variables and colour variables together were able to predict 88% of the variation in FRAP by means of PLS regression. Linear regression showed a high negative correlation between high values of L*, b* and FRAP, and a high positive correlation between titratable acidity, a*, hue, a*/b*, soluble solids, vitamin C, dry matter and FRAP values. Thus, colour measurements of intact tomatoes can be used as a non-destructive method to assess total antioxidant capacity of tomatoes.

Research paper thumbnail of Quality and chemical composition of ten red raspberry (Rubus idaeus L.) genotypes during three harvest seasons

Food Chemistry, 2014

Colour and chemical composition of fruits of 10 red raspberry genotypes grown in Nordic climate d... more Colour and chemical composition of fruits of 10 red raspberry genotypes grown in Nordic climate during three harvest seasons were studied. The main phenolic compounds in the fruits were ellagitannins and anthocyanins, contributing 57% and 42% to the quantified phenolic compounds, respectively. Cyanidin-3-sophoroside was the most abundant anthocyanin (61%). All quality parameters were significantly affected by genotype. The genotypes could be categorised into three groups. &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;Veten&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39; and &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;RU984 06038&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39; were characterised by high concentrations of flavonoids, i.e., anthocyanins and quercetin glycosides, and dark red colour. &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;Octavia&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;, &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;Glen Magna&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;, &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;RU004 03067&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;, &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;Glen Ample&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39; and &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;RU974 07002&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39; were characterised by light colour, high titratable acids and low flavonoid concentrations. &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;Malling Hestia&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;, &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;RU024 01003&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39; and &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;RU004 04095&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39; had high content of dry matter, soluble solids, ascorbic acid and ellagic acid containing compounds, in addition to high hue and chroma values. All quality parameters, except ascorbic acid and lambertianin C, varied significantly between harvest seasons. The lowest seasonal variation in fruit quality was observed in &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;RU024 01003&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39; and &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;Glen Ample&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39; and the highest &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;RU004 03067&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39; and &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;Glen Magna&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;.

Research paper thumbnail of Effects of ripeness and cultivar on chemical composition of strawberry (Fragaria×ananassa Duch.) fruits and their suitability for jam production as a stable product at different storage temperatures

Food Chemistry, 2014

Effects of ripeness (nearly ripe, ripe, fully ripe) and cultivar ('Blink', 'Polka' and 'Senga Sen... more Effects of ripeness (nearly ripe, ripe, fully ripe) and cultivar ('Blink', 'Polka' and 'Senga Sengana') on colour and chemical composition of strawberry fruits and their suitability for jam production, evaluated as stability during storage at 4 and 20°C for 3 and 6 months, were investigated. Quality traits of fruits and jams were significantly affected by both ripeness stage and cultivar. However, after 6 months of storage, particularly at 20°C, the effects of fruit ripeness and cultivar were considerably reduced. During jam storage, anthocyanins, ascorbic acid, chroma and hue were least stable in jams made from the least ripe fruits. Quality traits in jams made from 'Senga Sengana' were best preserved during storage, while quality and chemical composition in jams made from 'Blink' changed the most. In conclusion, fully ripe fruits were best suited for jam processing. Storage at low temperature was preferable and 'Senga Sengana' was the most and 'Blink' the least suitable cultivar for processing.

Research paper thumbnail of Variation in quality parameters between and within 14 Nordic tree fruit and berry species

Acta Agriculturae Scandinavica, Section B - Soil & Plant Science, 2012

Research paper thumbnail of EFFECTS OF PREHARVEST FACTORS ON BERRY QUALITY

X International Symposium on Vaccinium and Other Superfruits, 2014

We also present results from a series of perennial field trials in which berry quality attributes... more We also present results from a series of perennial field trials in which berry quality attributes are related to annual variation in important climatic factors.