SwePub
Sök i SwePub databas

  Utökad sökning

Träfflista för sökning "WFRF:(Cordeiro Q) "

Sökning: WFRF:(Cordeiro Q)

  • Resultat 31-40 av 63
Sortera/gruppera träfflistan
   
NumreringReferensOmslagsbildHitta
31.
  •  
32.
  •  
33.
  •  
34.
  •  
35.
  • Cusack, Daniela Francis, et al. (författare)
  • Tradeoffs and Synergies in Tropical Forest Root Traits and Dynamics for Nutrient and Water Acquisition : Field and Modeling Advances
  • 2021
  • Ingår i: Frontiers in Forests and Global Change. - : Frontiers Media S.A.. - 2624-893X. ; 4
  • Forskningsöversikt (refereegranskat)abstract
    • Vegetation processes are fundamentally limited by nutrient and water availability, the uptake of which is mediated by plant roots in terrestrial ecosystems. While tropical forests play a central role in global water, carbon, and nutrient cycling, we know very little about tradeoffs and synergies in root traits that respond to resource scarcity. Tropical trees face a unique set of resource limitations, with rock-derived nutrients and moisture seasonality governing many ecosystem functions, and nutrient versus water availability often separated spatially and temporally. Root traits that characterize biomass, depth distributions, production and phenology, morphology, physiology, chemistry, and symbiotic relationships can be predictive of plants’ capacities to access and acquire nutrients and water, with links to aboveground processes like transpiration, wood productivity, and leaf phenology. In this review, we identify an emerging trend in the literature that tropical fine root biomass and production in surface soils are greatest in infertile or sufficiently moist soils. We also identify interesting paradoxes in tropical forest root responses to changing resources that merit further exploration. For example, specific root length, which typically increases under resource scarcity to expand the volume of soil explored, instead can increase with greater base cation availability, both across natural tropical forest gradients and in fertilization experiments. Also, nutrient additions, rather than reducing mycorrhizal colonization of fine roots as might be expected, increased colonization rates under scenarios of water scarcity in some forests. Efforts to include fine root traits and functions in vegetation models have grown more sophisticated over time, yet there is a disconnect between the emphasis in models characterizing nutrient and water uptake rates and carbon costs versus the emphasis in field experiments on measuring root biomass, production, and morphology in response to changes in resource availability. Closer integration of field and modeling efforts could connect mechanistic investigation of fine-root dynamics to ecosystem-scale understanding of nutrient and water cycling, allowing us to better predict tropical forest-climate feedbacks.
  •  
36.
  •  
37.
  • da Silva, MA, et al. (författare)
  • Lack of association between a 3'UTR VNTR polymorphism of dopamine transporter gene (SLC6A3) and ADHD in a Brazilian sample of adult patients
  • 2011
  • Ingår i: Journal of attention disorders. - : SAGE Publications. - 1557-1246 .- 1087-0547. ; 15:4, s. 305-309
  • Tidskriftsartikel (refereegranskat)abstract
    • Objective: To investigate a possible association between a 3’UTR VNTR polymorphism of the dopamine transporter gene (SLC6A3) and ADHD in a Brazilian sample of adult patients. Method: Study Case-control with 102 ADHD adult outpatients ( DSM-IV criteria) and 479 healthy controls. The primers’ sequence used were: 3’UTR-Forward: 5’ TGT GGT GAT GGG AAC GGC CTG AG 3’ and 3’UTR-Reverse: 5’ CTT CCT GGA GGT CAC GGC TCA AGG 3’. Alleles of the 3’UTR were coded according to their number of repeats: 6- repeat 320 bp (allele 6), 8- repeat 400 bp (allele 8), 9- repeat 440 bp (allele 9), 10- repeat 480 bp (allele 10), and 11- repeat 520 bp (allele 11). Results: There were no allelic (χ2 = 2.67, 5df, p = .75) and genotypic (χ2 = 7.20, 1df, p = .61) association between adult ADHD and VNTR 3’UTR polymorphism of SLC6A3. Conclusion: Our findings do not support SLC6A3 as marker genetic susceptibility factor in adult ADHD. More comprehensive polymorphism coverage within the SLC6A3 region should be conducted in larger samples, including comparisons in clinical subgroups, and in samples with different ethnic backgrounds. (J. of Att. Dis. 2011; 15(4) 305-309)
  •  
38.
  •  
39.
  •  
40.
  •  
Skapa referenser, mejla, bekava och länka
  • Resultat 31-40 av 63

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy