| 1. |
- Andersson, Mats X., 1977, et al.
(författare)
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Involvement of the Electrophilic Isothiocyanate Sulforaphane in Arabidopsis Local Defense Responses
- 2015
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Ingår i: Plant Physiology. - : Oxford University Press (OUP). - 0032-0889 .- 1532-2548. ; 167:1
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Tidskriftsartikel (refereegranskat)abstract
- Plants defend themselves against microbial pathogens through a range of highly sophisticated and integrated molecular systems. Recognition of pathogen-secreted effector proteins often triggers the hypersensitive response (HR), a complex multicellular defense reaction where programmed cell death of cells surrounding the primary site of infection is a prominent feature. Even though the HR was described almost a century ago, cell-to-cell factors acting at the local level generating the full defense reaction have remained obscure. In this study, we sought to identify diffusible molecules produced during the HR that could induce cell death in naive tissue. We found that 4-methylsulfinylbutyl isothiocyanate (sulforaphane) is released by Arabidopsis (Arabidopsis thaliana) leaf tissue undergoing the HR and that this compound induces cell death as well as primes defense in naive tissue. Two different mutants impaired in the pathogen-induced accumulation of sulforaphane displayed attenuated programmed cell death upon bacterial and oomycete effector recognition as well as decreased resistance to several isolates of the plant pathogen Hyaloperonospora arabidopsidis. Treatment with sulforaphane provided protection against a virulent H. arabidopsidis isolate. Glucosinolate breakdown products are recognized as antifeeding compounds toward insects and recently also as intracellular signaling and bacteriostatic molecules in Arabidopsis. The data presented here indicate that these compounds also trigger local defense responses in Arabidopsis tissue.
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| 2. |
- Adolfsson, Lisa, 1984, et al.
(författare)
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Mycorrhiza Symbiosis Increases the Surface for Sunlight Capture in Medicago truncatula for Better Photosynthetic Production
- 2015
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Ingår i: PLoS ONE. - : Public Library of Science (PLoS). - 1932-6203. ; 10:1
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Tidskriftsartikel (refereegranskat)abstract
- Arbuscular mycorrhizal (AM) fungi play a prominent role in plant nutrition by supplying mineral nutrients, particularly inorganic phosphate (Pi), and also constitute an important carbon sink. AM stimulates plant growth and development, but the underlying mechanisms are not well understood. In this study, Medicago truncatula plants were grown with Rhizophagus irregularis BEG141 inoculum (AM), mock inoculum (control) or with Pi fertilization. We hypothesized that AM stimulates plant growth through either modifications of leaf anatomy or photosynthetic activity per leaf area. We investigated whether these effects are shared with Pi fertilization, and also assessed the relationship between levels of AM colonization and these effects. We found that increased Pi supply by either mycorrhization or fertilization led to improved shoot growth associated with increased nitrogen uptake and carbon assimilation. Both mycorrhized and Pi-fertilized plants had more and longer branches with larger and thicker leaves than the control plants, resulting in an increased photosynthetically active area. AM-specific effects were earlier appearance of the first growth axes and increased number of chloroplasts per cell section, since they were not induced by Pi fertilization. Photosynthetic activity per leaf area remained the same regardless of type of treatment. In conclusion, the increase in growth of mycorrhized and Pi-fertilized Medicago truncatula plants is linked to an increase in the surface for sunlight capture, hence increasing their photosynthetic production, rather than to an increase in the photosynthetic activity per leaf area.
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| 3. |
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| 4. |
- Adolfsson, Margareta, 1950-
(författare)
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Applying the ICF-CY to identify everyday life situations of children and youth with disabilities
- 2011
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Four studies were included in this doctoral dissertation aiming to investigatehow habilitation professionals perceive the ICF-CY in clinical work and to identify everyday life situations specific for children and youth aged 0-17 years. The ICF-CY was the conceptual framework and since the research was conducted on as well as with the ICF-CY, the use of the classification runs like a thread through all the work. The design was primarily qualitative and included descriptive and comparative content analyses. Study I was longitudinal, aiming to explore how an implementation of the ICF-CY in Swedish habilitation services was perceived. Studies II-IV were interrelated, aiming to explore children’s most common everyday life situations. Content in measures of participation, professionals’ perspectives, and external data on parents’ perspectives were linked to the ICF-CY and compared. Mixed methods design bridged the Studies III-IV. Results in Study I indicated that knowledge on the ICF-CY enhanced professionals’ awareness of families’ views of child functioning and pointed to the need for ICF-CY based assessment and intervention methods focusing on child participation in life situations. A first important issue in this respect was to identify everyday life situations. Two sets of ten everyday life situations related to the ICF-CY component Activities and Participation, chapters d3-d9, were compiled and adopted for younger and older children respectively, establishing a difference in context specificity depending on maturity and growing autonomy. Furthermore, key constructs in the ICFCY model were discussed, additional ICF-CY linking rules were presented and suggestions for revisions of the ICF linking rules and the ICF-CY were listed. As the sample of everyday life situations reflects the perspectives of adults, further research has to add the perspective of children and youth. The identified everyday life situations will be the basis for the development of code sets included in a screening tool intended for self- or proxy- report of participation from early childhood through adolescence.
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| 5. |
- Adolfsson, Margareta, 1950-, et al.
(författare)
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Everyday Life Situations for Child Participation
- 2011
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Ingår i: Third ISEI Conference.
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Konferensbidrag (refereegranskat)abstract
- Child Participation is defined by the International Classification of Functioning, Disability and Health forChildren and Youth (ICF-CY) as involvement in life situations but knowledge on children´s specific everydaylife situations (EDLs) is lacking. Professionals in early intervention services need a structured tool to identifyand assess child participation in everyday life situations. It should support children with disabilities indescribing what matters most for them in intervention planning. With the long term goal to create ICF-CY codesets, EDLs were identified by a systematic literature search for measures of performance or participation andby collecting professional opinions on EDL and participation. Information was linked to the ICF-CY andtriangulated with research exploring family opinions. Most items in measures were linked to moving around,play, and recreation and leisure. The six measures of performance and six of participation differed regardingcontent and content dependent on age group.Descriptions on EDLs from 297 professionals were linked to ICF-CY codes. Frequent linkages were Self-care,such as eating and hygiene; Major life areas, such as play and education; and Relationships, but also sleep. Byrelating EDLs directly to predefined ICF-CY categories in the ICF-CY component Activities and Participation,five EDLs across categories were identified based on responses from 207 professionals. These concernedsleep, communication, dressing, family relationships and play. Some differences emerged dependent onparticipants’ culture and on age group. A triangulation between professional and family opinions concerningEDL’s revealed relatively high agreement. As a final result, a set of approximately 12-15 everyday lifesituations is expected to be identified in this study to be used for development of code sets.
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| 6. |
- Adolfsson, Margareta, 1950-, et al.
(författare)
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Exploring changes over time in habilitation professionals' perceptions and applications of the International Classification of Functioning, Disability and Health, version for Children and Youth (ICF-CY).
- 2010
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Ingår i: Journal of Rehabilitation Medicine. - : Medical Journals Sweden AB. - 1650-1977 .- 1651-2081. ; 42:7, s. 670-678
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVE This study explored how professionals in inter-disciplinary teams perceived the implementation of the World Health Organization's International Classification of Functioning, Disability and Health, version for Children and Youth (ICF-CY) in Swedish habilitation services. DESIGN Descriptive longitudinal mixed-methods design. METHODS Following participation in a 2-day in-service training on the ICF-CY, 113 professionals from 14 interdisciplinary teams described their perceptions of the implementation of the ICF-CY at 3 consecutive time-points: during in-service training, after 1 year, and after 2.5 years. RESULTS Implementation of the ICF-CY in daily work focused on assessment and habilitation planning and required adaptations of routines and materials. The ICF-CY was perceived as useful in supporting analyses and in communication about children's needs. Professionals also perceived it as contributing to new perspectives on problems and a sharpened focus on participation. CONCLUSION Professionals indicated that the ICF-CY enhanced their awareness of families' views of child participation, which corresponded to organizational goals for habilitation services. An implementation finding was a lack of tools fitting the comprehensive ICF-CY perspective. The study points to the need for ICF-CY-based assessment and intervention methods focusing on child participation
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| 7. |
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| 8. |
- Adolfsson, Margareta, 1950-, et al.
(författare)
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Identifying child functioning from an ICF-CY perspective : everyday life situations explored in measures of participation
- 2011
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Ingår i: Disability and Rehabilitation. - : Informa UK Limited. - 0963-8288 .- 1464-5165. ; 33:13-14, s. 1230-1244
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Tidskriftsartikel (refereegranskat)abstract
- Purpose. This study was part of a larger work to develop an authentic measure consisting of code sets for self- or proxy-report of child participation. The aim was to identify common everyday life situations of children and youth based on measures of participation. Method. The study was descriptive in nature and involved several stages: systematic search of literature to find articles presenting measures for children and youth with disabilities, identifying measures in selected articles, linking items in included measures to the ICF-CY, analysing content in measures presented as performance and participation and identifying aggregations of ICF-CY codes across these measures. Results. A large number of measures for children and youth with disabilities were identified but only 12 fulfilled the inclusion criteria. A slight distinction in content and age appropriateness appeared. Measures presented as performance covered all the ICF-CY Activities and Participation chapters, whereas measures presented as participation covered five of nine chapters. Three common everyday life situations emerged from the measures: Moving around, Engagement in play and Recreation and leisure. Conclusion. Only a small number of life situations for children and youth emerged from items in selected measures, thus, other sources are needed to identify more everyday life situations.
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| 9. |
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| 10. |
- Adolfsson, Margareta, 1950-, et al.
(författare)
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Is ICF a valid tool for structuring health information?
- 2007
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Ingår i: 5<sup>th</sup> Scandinavian Conference on Health Informatics and 11<sup>th </sup>Swedish National Term Conference.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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