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The main objective of the
Journal of Berry Research is to improve the knowledge about quality and production of berries to benefit health of the consumers and maintain profitable production using sustainable systems.
The objective will be achieved by focusing on four main areas of research and development:
1. From genetics to variety evaluation
2. Nursery production systems and plant quality control
3. Plant physiology, biochemistry and molecular biology, as well as cultural management
4. Health for the consumer: components and factors affecting berries' nutritional value
Specifically, the journal will cover berries (strawberry, raspberry, blackberry, blueberry, cranberry currants, etc.), as well as grapes and small soft fruit in general (e.g., kiwi fruit). It will publish research results covering all areas of plant breeding, including plant genetics, genomics, functional genomics, proteomics and metabolomics, plant physiology, plant pathology and plant development, as well as results dealing with the chemistry and biochemistry of bioactive compounds contained in such fruits and their possible role in human health. Contributions detailing possible pharmacological, medical or therapeutic use or dietary significance will be welcomed in addition to studies regarding biosafety issues of genetically modified plants.
Journal of Berry Research will feature reviews, research articles, brief communications, position papers, letters and patent updates.
Abstract: Polyphenols constitute a large chemical class of phytochemicals among which the stilbenoid sub-class has attracted significant attention due to their elaborate structural diversity and biological activities. Resveratrol, a well-known stilbene, has been extensively studied due to its wide range of biological activities and occurrence in plant foods, including grape and some berries. Apart from the intact resveratrol molecule and closely related analogs, this compound can be regarded as a monomer which occurs as a primary building block for subsequent polymerization which leads to extensive structural diversity. Consequently, stilbenoids exhibit a vast array of polymerization and oligomeric construction, with over 60…such naturally occurring stilbenes being isolated and identified in the last five years alone, adding to the hundreds which are already known to date. This review updates the literature on natural stilbenoids which have been isolated and identified since 2009 and discusses the biological activities of this sub-class of bioactive polyphenols as a whole.
Abstract: BACKGROUND: Allergy to food is a hypersensitivity disorder of the immune system to normally harmless food ingredients. A promising solution for allergenic patients is the development of hypoallergenic food. OBJECTIVE: Selection and breeding of low-allergenic variety is the conventional strategy to produce hypoallergenic food. The strawberry fruit proteins Fra a 1.01E, Fra a 1.02 and Fra a 1.03 are homologous of the major birch pollen allergen Bet v1 but their individual allergenic potentials are unknown. METHOD: We produced the recombinant Fra a allergens and evaluated their cross allergenic potential in birch pollen allergic patients by a basophil activation test. Anti-Fra…a 1.02 antibodies were also used to screen for allergen deficient strawberry lines. RESULTS: Although Fra a 1.01E, Fra a 1.02 and Fra a 1.03 have sequence similarities of 70, 71 and 74% with Bet v 1 Fra a 1.02 showed the highest allergenic potential. The data support the role of Fra a 1.02 as the major allergen for individuals affected by a strawberry allergy. The screening of strawberry varieties detected genotypes with significantly reduced levels of the allergen. CONCLUSION: Genotypes with reduced Fra a 1.02 proteins might serve as starting material for the breeding of hypoallergenic strawberry varieties.
Abstract: BACKGROUND: Chemical pesticides are predominantly used for managing various pests on strawberries in California. Biological control is limited to the release of predatory mites against spider mites. Predominant use of chemical pesticides does not provide complete and satisfactory control of certain pests and interferes with biological control. Microbial control is an unexplored area in California strawberries. Limited pest control with current practices, risk of pesticide resistance, and concern for environmental safety associated with excessive use of chemical pesticides prompt the search for safer and effective alternatives. Entomopathogenic fungus, Beauveria bassiana (Balsamo) Vuillemin and a botanical pesticide, azadirachtin are active against…most of the strawberry pests. Additionally, B. bassiana is known to endophytically colonize some plant species and provide protection against herbivore damage. Identifying non-chemical alternatives is a critical area in strawberry pest management. OBJECTIVE: Explore the potential of B. bassiana against strawberry pests and the ability to colonize strawberry plants. METHODS: Efficacy of reduced rates of chemical pesticides, B. bassiana, and azadirachtin against adult lygus bug, Lygus hesperus Knight were determined in laboratory assays. Greenhouse and laboratory studies were conducted to determine endophytic colonization potential of B. bassiana in strawberry plants. Efficacy of B. bassiana against L. hesperus was determined in small plot field trial in strawberries and against other pests in greenhouse strawberries was also studied. RESULTS: Certain combinations of chemical pesticides and B. bassiana at reduced rates improved L. hesperus mortality. Beauveria bassiana colonized and persisted in various strawberry tissues for up to 9 weeks after inoculation. No impact of the B. bassiana on L. hesperus numbers was seen in the field study, but was found effective, along with azadirachtin, against some pests in the greenhouse study. CONCLUSION: Non-chemical alternatives such as B. bassiana and azadirachtin have a good potential for strawberry pest management.
Abstract: BACKGROUND: Chilling is traditionally assessed in France based on the number of hours below 7°C. OBJECTIVE: This research was carried out to evaluate the effect of two diurnal temperatures (11°C, 16°C) with a night temperature below 7°C for chilling effect. METHODS: ‘Gariguette’ cv. potted plants were grown with temperatures above 10°C in 2009 and above 14°C in 2010 until the onset of chilling conditions. Plants were transferred into controlled conditions during 68 days and exposed to 11°C/2°C or 16°C/2°C day/night temperatures, to differentiate four treatments: a) “mild” conditions (16°C/2°C day/night); b) “cold” conditions (11°C/ 2°C day/night); c) “mild then cold”…conditions (34 days each); d) “cold then mild” conditions (34 days each). Potted plants were then transferred to a heated plastic tunnel for fruit production assessment. RESULTS: The “mild” treatment showed a lower fruit yield than the “cold” treatment. This negative effect of the “mild” treatment was compensated when plants were exposed to the “cold” treatment during half of the chilling duration (“cold then mild” or “mild then cold” treatment). CONCLUSIONS: These results indicated that temperature fluctuations above 7°C have to be taken into account in case of a long chilling.
Abstract: BACKGROUND: To grow remontant strawberries at high latitudes in autumn is challenging because of short days and low light levels. Nevertheless, current day and night temperatures in Norwegian coastal areas up to 63 degrees N are normally sufficient for growth and fruit development till early October, and even higher temperatures can be expected in the future according to climatic scenarios, with potential to prolong the growing season. However, light would be a minimum factor. It is therefore of interest to examine the effects of providing supplemental light when photosynthetic active radiation (PAR) falls below critical level for development of high…fruit quality. OBJECTIVE: To examine effects on fruit yield parameters, fruit tension, Brix° and arthropod numbers, in order to investigate the potential of LED lighting using diodes giving red and blue light, as a means to prolong the growing season at northern latitudes. METHOD: In this two-year study remontant strawberry cvs ‘Everest’ and ‘Rondo’ were grown in high polytunnels. Two LED lighting levels (LED100 and LED300) were applied from 7 Pm to 7 AM, whenever light intensity fell below 400 μmol m−2 s−1 from first week of September, and compared to ambient light (control). The LED300 was peaking at wavelengths of 460 nm and 660 nm, respectively blue and red, and the relation between blue and red light was 1 : 8; LED100 delivered similar wavelengths but the blue to red relation was 2 : 8. Fruit yield, soluble solids (Brix°), fruit firmness, temperature (°C), dew point (°C), and PAR light (μmol m−2 s−1 ) were recorded. The experimental design was block with four replications. The lamps were hung with the light source 40 cm above top of canopy, giving a PAR radiation at top of canopy of LED100 and LED300 of respectively 900 and 258 μmol m−2 s−1 . RESULTS: LED improved fruit yield and quality, but more at 900 than at 258 μmol m−2 s−1 . However, highest light level was probably beyond the saturation point for photosynthesis, at least in early morning and late evening and the last three weeks of the harvesting season, because of low temperatures. Some fruit yield was not harvested because of too low temperatures to achieve ripen fruits after mid-October. Arthropods were sampled from ‘Rondo’ leaves 2–3 times per season, and aphids, spider mites and predatory mites (introduced) were the most numerous groups. LED significantly decreased the number of spider mites in the autumn. CONCLUSIONS: LED lighting has potential as light source growing remontant strawberries in high polytunnels, when PAR radiation is below 400 μmol m−2 s−1 . However, to benefit fully of the light it would be necessary to grow the plants in winter tunnels and add heating. That would increase the yields significantly compared with our results.
Keywords: Extended season, cultivars, fruit yield, fruit tension, Brix°, Tetranychus urticae, Neoseiulus cucumeris, aphids