| 1. |
- Bergstrand, Karl-Johan, et al.
(författare)
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Nulägesanalys trädgård
- 2018
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Rapport (populärvet., debatt m.m.)abstract
- Rapporten Nulägesanalys - trädgård har genomförts inom ramen för projektgruppen Insatsstyrka trädgård. Syftet med inventeringen har varit att ge svar på vem som jobbar med trädgårdsvetenskap, vilka forskargrupper och med vilka forskningsämnen, samt identifiera framtida arbetsfält inom ämnet trädgårdsvetenskap och därmed ge uppslag för framtida utveckling av forskningsfält, utbildning och samverkan. I detta ingår att kartlägga trädgårdsvetenskaplig forskning, utbildning och samverkan vid SLU. Nulägesanalysen förväntas därmed ge en grund för fortsatt strategiskt arbete med att utveckla ämnet trädgårdsvetenskap (Horticultural Science) utifrån inventerade resurser och förutsättningar.
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| 2. |
- Thorfve, Anna, 1982, et al.
(författare)
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Gene Expression Profiling of Peri-Implant Healing of PLGA-Li+ Implants Suggests an Activated Wnt Signaling Pathway In Vivo
- 2014
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Ingår i: Plos One. - : Public Library of Science (PLoS). - 1932-6203. ; 9:7
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Tidskriftsartikel (refereegranskat)abstract
- Bone development and regeneration is associated with the Wnt signaling pathway that, according to literature, can be modulated by lithium ions (Li+). The aim of this study was to evaluate the gene expression profile during peri-implant healing of poly(lactic-co-glycolic acid) (PLGA) implants with incorporated Li+, while PLGA without Li+ was used as control, and a special attention was then paid to the Wnt signaling pathway. The implants were inserted in rat tibia for 7 or 28 days and the gene expression profile was investigated using a genome-wide microarray analysis. The results were verified by qPCR and immunohistochemistry. Histomorphometry was used to evaluate the possible effect of Li+ on bone regeneration. The microarray analysis revealed a large number of significantly differentially regulated genes over time within the two implant groups. The Wnt signaling pathway was significantly affected by Li+, with approximately 34% of all Wnt-related markers regulated over time, compared to 22% for non-Li+ containing (control; Ctrl) implants. Functional cluster analysis indicated skeletal system morphogenesis, cartilage development and condensation as related to Li+. The downstream Wnt target gene, FOSL1, and the extracellular protein-encoding gene, ASPN, were significantly upregulated by Li+ compared with Ctrl. The presence of beta-catenin, FOSL1 and ASPN positive cells was confirmed around implants of both groups. Interestingly, a significantly reduced bone area was observed over time around both implant groups. The presence of periostin and calcitonin receptor-positive cells was observed at both time points. This study is to the best of the authors' knowledge the first report evaluating the effect of a local release of Li+ from PLGA at the fracture site. The present study shows that during the current time frame and with the present dose of Li+ in PLGA implants, Li+ is not an enhancer of early bone growth, although it affects the Wnt signaling pathway.
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| 3. |
- Adenskog, Magnus, et al.
(författare)
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Developing general guidelines and tools for documenting merits from external engagement - A practical approach
- 2022
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Konferensbidrag (refereegranskat)abstract
- The Swedish higher education sector is in a phase in which the importance of external engagement for quality in research and education at universities has gradually become clearer. This development is also visible at European as well as global level. It is therefore relevant to assess and value the work that takes place at universities within the framework of external engagement and to support a diversification of academic competencies and careers. The work presented has to a large extent taken place within the national project “MerSam-Meritvärde av samverkansskicklighet” (https://www.hb.se/en/collaboration/mersam/ ) involving 14 Swedish universities, during 2019-2020. The overall objective of the project has been to develop knowledge, policy and practice for assessment of merits from external engagement with the long-term objective to develop a common understanding and framework on a national level. The project method has been exploratory combining both individual and organisational perspectives in order to develop good practice and to stimulate a national dialogue on the need of a more structured and harmonised approach when assessing merits from external engagement. One of the project objectives was to develop and piloting a practical guide for academic staff on how to document and assess merits from external engagement using a flexible yet a systematic and structured approach. The guide includes tools that supports the identification of a diverse set of competencies related to external engagement, dissemination, innovation in relation to the task of collaboration as stated in the Swedish Higher Education Act as well as activities in research and education. Any national initiative needs however to harmonise with a global academic context. The guidelines and tools developed in this work are anticipated to be in line with and relevant for initiatives taking place within open science on the international arena.
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| 4. |
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| 7. |
- Alsanius, Beatrix, et al.
(författare)
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Light and Microbial Lifestyle: The Impact of Light Quality on Plant-Microbe Interactions in Horticultural Production Systems-A Review
- 2019
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Ingår i: Horticulturae. - : MDPI AG. - 2311-7524. ; 5
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Tidskriftsartikel (refereegranskat)abstract
- Horticultural greenhouse production in circumpolar regions (>60 degrees N latitude), but also at lower latitudes, is dependent on artificial assimilation lighting to improve plant performance and the profitability of ornamental crops, and to secure production of greenhouse vegetables and berries all year round. In order to reduce energy consumption and energy costs, alternative technologies for lighting have been introduced, including light-emitting diodes (LED). This technology is also well-established within urban farming, especially plant factories. Different light technologies influence biotic and abiotic conditions in the plant environment. This review focuses on the impact of light quality on plant-microbe interactions, especially non-phototrophic organisms. Bacterial and fungal pathogens, biocontrol agents, and the phyllobiome are considered. Relevant molecular mechanisms regulating light-quality-related processes in bacteria are described and knowledge gaps are discussed with reference to ecological theories.
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| 8. |
- Alsanius, Beatrix, et al.
(författare)
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New challenges for organic greenhouse horticulture in Sweden
- 2020
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Ingår i: Acta Horticulturae. - 0567-7572 .- 2406-6168. ; , s. 1079-1084
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Swedish consumers buy increasing amounts of organic food. Also, the Swedish Government aspires to increase food sovereignty and volume of organic food stuff in public meals from 36 (2017) to 60% in 2030. There is a substantial mismatch between demand and the production of organic vegetables. Today, 4.9% of the total greenhouse area in Sweden is used for organic production. The majority of organic production of greenhouse vegetables in Sweden is performed in containers and confined beds. The approval of the revised European regulation for organic farming in 2018 reinforces production in natural soil, leads to dramatic changes for organic greenhouse horticulture in Sweden. Confined beds need to be phased out. Cultivation methods that conserve or increase organic matter in the soil should be used. Thus, soil bound systems using crop rotations and soil fertility maintaining activities need to be implemented. This corroborates with increased burden of soil borne diseases and lower yields. Such systems, well established in southern Europe, cannot be translated to northern European conditions, due to constraints in climate and day length, as well as constraints due to greenhouse construction (permanent construction). This presentation displays the challenges and consequences to meet the changed legislation.
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| 9. |
- Alsanius, Beatrix, et al.
(författare)
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Ornamental flowers in new light: Artificial lighting shapes the microbial phyllosphere community structure of greenhouse grown sunflowers (Helianthus annuus L.)
- 2017
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Ingår i: Scientia Horticulturae. - : Elsevier BV. - 0304-4238 .- 1879-1018. ; 216, s. 234-247
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Tidskriftsartikel (refereegranskat)abstract
- Artificial assimilation lighting is a common practice in greenhouse horticulture in the circumpolar region to compensate for natural low light conditions. To modulate plant architecture, regulate flowering of photoperiodic crops, increase plant performance per energy input and consequently profitability, light emitting diodes (LEDs) have been suggested as a powerful tool for ornamental growers in complementary or replacement of conventional lighting such as incandescent, fluorescent and high pressure sodium (HPS) lamps. As LED light differs from HPS lamps with regard to spectral output, light distribution as well as heat emission, the microclimate within the crop stand is affected. In two independent experiments conducted in fall and winter, we therefore compared the effect of two types of LED light (red 660 nm + blue 460 nm LED, 80:20 RB-LED; white LED, W-LED) with HPS lighting on ornamental sunflowers (Helianthus annuus cv. 'Teddy Bear'). Depending of the solar radiation (fall vs winter experiments), a same PPFD of 70-120 mu mol m(-2) s(-1) of artificial lighting (photoperiod of 16 h) was given at the top of the plants. Plant growth performance and biomass, leaf temperature, photobiological parameters (photosynthetic activity, stomatal conductance, chlorophyll fluorescence) as well as the leaf associated microbiome, assessed using culture dependent and independent methods on apical, directly exposed to the light treatments, and basal leaves, were studied. As expected, significant differences were obtained for plant related parameters between the two repetitions of the experiment due to difference in solar radiation. Light treatments influenced plant growth performance which was lower for all parameters in sunflowers exposed to LEDs than HPS. However, no differences were found with respect to photobiological parameters. Top leaf temperature was higher in the presence of HPS than LEDs, which explained the lower plant growth performance observed under LED regimes. Colony-forming units representing culturable fungi and fluorescent pseudomonads were higher on basal leaves than on apical ones, but did not vary with respect to light treatments. On the other hand, biodiversity estimated with respect to species abundance and evenness (Shannon-H index) and species richness (Chao1) revealed different patterns for the fungal and bacterial microbiome. Regardless of the leaf position, light treatments affected fungal species abundance and evenness, which was highest on leaves exposed to HPS, but not species richness. The fungal microbiome was more diverse on apical than on basal leaves. For the bacterial microbiome, biodiversity estimates differed between the repetitions. Interactions between leaf temperature and bacterial genera were found for several of the dominant genera in the sunflower phyllosphere (Pseudomonas, Staphylococcus, Enhydro bacter) while other decisive bacterial and fungal genera were correlated to photobiological parameters, e.g. Bradyrhizobium, Sphingomonas, Brevibatericum, Bacillus, Hypotrachyna, Aureobasidium. The use of "new light" in greenhouse ornamentals is not only a technological change modifying plant morphology and development, but also affects the microbial ecology on plant surfaces, implying consequences on plant protection issues and biological control strategies. (C) 2017 Elsevier B.V. All rights reserved.
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| 10. |
- Alsanius, Beatrix, et al.
(författare)
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Persistence of fenhexamid in the nutrient solution of a closed cropping system
- 2013
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Ingår i: Agricultural Water Management. - : Elsevier BV. - 0378-3774. ; 127, s. 25-30
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Tidskriftsartikel (refereegranskat)abstract
- There are concerns about emissions of plant protection products (PPP) from protected cultivations, including high-tech production systems. Modern high-tech greenhouse horticulture is performed in cropping systems with closed water and nutrient loops, so PPP residues are not leaked to the external environment, but are captured and may accumulate within the recycled greenhouse solution. In this pilot study, the botryticide fenhexamid (FEX; Teldor WG50®) was used as a model PPP and incubated (0.01 times the recommended concentration spray solution) in the colonized nutrient solution from a closed tomato production system in darkness at 20 ◦C. Samples were taken after 0 h, 24 h, 48 h, 96 h, 192 h and 504 h (0, 1, 2, 4, 8 and 21 days) of incubation to monitor FEX concentration, dissolved organic carbon content (DOC), electrical conductivity, pH and microbial dynamics. Culture-dependent (viable counts for general bacterial, fungal flora and fluorescent pseudomonads on stationary agar, with/without supplement of FEX) and independent (denatured gradient gel electrophoresis, PCR-DGGE) methods were used for microbial analyses. DOC and FEX concentration did not change during incubation, whereas pH and electrical conductivity increased significantly. Density of culturable fungi decreased from the start of incubation, while density of culturable bacteria declined in late incubation. Fluorescent pseudomonads declined in early incubation but increased significantly at later stages. Under nutrient-deprived conditions, density of culturable bacteria decreased during the course of incubation. Microbial community analysis by DGGE supported these findings. Differences between the density of culturable bacteria assessed on semi-selective media with and without FEX supplementation were low. However, addition of FEX to diluted malt extract agar negatively affected the density of culturable fungi.
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