SwePub
Sök i SwePub databas

  Utökad sökning

Träfflista för sökning "hsv:(LANTBRUKSVETENSKAPER) ;pers:(Weih Martin)"

Sökning: hsv:(LANTBRUKSVETENSKAPER) > Weih Martin

  • Resultat 1-10 av 179
Sortera/gruppera träfflistan
   
NumreringReferensOmslagsbildHitta
1.
  •  
2.
  • Affholder, Marie-Cecile, et al. (författare)
  • Cadmium Reduction in Spring Wheat: Root Exudate Composition Affects Cd Partitioning Between Roots and Shoots
  • 2023
  • Ingår i: Journal of Soil Science and Plant Nutrition. - 0718-9508 .- 0718-9516. ; 23, s. 3537-3547
  • Tidskriftsartikel (refereegranskat)abstract
    • Cadmium (Cd) in cereals is one of the major sources of Cd intake by human diets, and solutions to reduce Cd concentrations in wheat still need to be developed. Plant breeding, by selecting low-Cd varieties, can be an important tool to reduce Cd in crops. Knowing the genotypic variation in Cd accumulation and furthering our understanding of the impact of root exudates composition on Cd accumulation in crops may provide valuable information for plant breeding. In this study, we selected nine spring wheat varieties and analysed the accumulation and distribution of Cd in shoots, roots, root surfaces and kernels in relation to their qualitative and quantitative composition of root exudates, determined by H-1-NMR (Proton Nuclear Magnetic Resonance). Results showed that the Cd concentration in shoots at an early stage could be used as a predictor for Cd concentration in kernels. Total Cd uptake was not correlated to the mobility of Cd in the rhizosphere, but total Cd was negatively correlated to Cd adsorbed at the root surface. Furthermore, (i) exudation of organic acids (primarily succinate and acetate) increased Cd concentration in shoots, and (ii) exudation of nucleosides, DNA (deoxyribonucleic acid) degradation products, increased Cd adsorption at the root surface. Therefore, root exudates composition should be taken into account when selecting for low-Cd wheat traits.
  •  
3.
  • Ajal, James, et al. (författare)
  • Intercropping drives plant phenotypic plasticity and changes in functional trait space
  • 2022
  • Ingår i: Basic and Applied Ecology. - : Elsevier BV. - 1439-1791 .- 1618-0089. ; 61, s. 41-52
  • Tidskriftsartikel (refereegranskat)abstract
    • The relevance of intercropping, where two or more crop species are simultaneously grown on the same land space, is growing due to its potential for improving resource use and maintaining stable yields under variable weather conditions. However, the actual growth of intercropped species may differ resulting from the idiosyncratic effect of crop diversity, and with this, the realized benefits from intercrops are found to depend critically on the cultivar, species, management and environmental conditions. This study aimed to apply a trait-based approach, in which ecological niche spaces are defined through n-dimensional hypervolumes, to identify the contribution of species/cultivar, cultivation design (sole crop or intercrop) and management (low or high fertilization) to the trait diversity of four crop species, pea-barley and faba bean-wheat, when grown as sole crops and intercrops. Four traits were used as trait axes for the trait space analysis: canopy height, shoot biomass, tiller/node number, and grain yield. We found that trait spaces differed with crop species and cultivars, and whether they were grown as intercrops or sole crops. Trait spaces differed between high and low fertilization only for the cereals grown in the more productive site (i.e. Denmark). Species grown as intercrops had larger volumes than when grown as sole crops, as a result of trait plasticity. This response to intercropping was apparent in almost all the species grown in Sweden and Denmark, except for wheat in Denmark. The study demonstrated that individual species responded to intercropping compared to sole cropping through the plasticity of traits, which influenced the shape of the hypervolumes to divide up the trait space between the species. The findings are important in illustrating the plastic responses of arable crops, which are relevant for understanding the productivity of species grown in intercrops as compared to sole crops.
  •  
4.
  • Ajal, James, et al. (författare)
  • Nutrient Accumulation Pattern in Mixtures of Wheat and Faba Bean Is Strongly Influenced by Cultivar Choice and Co-Existing Weeds
  • 2022
  • Ingår i: Biology. - : MDPI AG. - 2079-7737. ; 11
  • Tidskriftsartikel (refereegranskat)abstract
    • Simple Summary Growing a mixture of two or more crop species, particularly cereals and legumes, can enhance resource use efficiency for growth-limiting resources, such as nutrients. We evaluated the patterns of nutrient accumulation efficiency in different cultivars of faba bean and wheat grown in mixtures with and without the presence of weeds in a growth container experiment. The cultivar used in the mixture determined the amount of nitrogen accumulated by the legumes, but cereals generally accumulated more nitrogen in the mixtures than when grown as sole crops. Competition from weeds resulted in lower nitrogen accumulation in the crop plants, and plant neighbor identity affected the accumulation of other nutrients relative to the accumulation of nitrogen and phosphorus in the plants. Cultivar choice is therefore important for resource limitation and thereby the growth performance of plants grown in mixtures. Cereal-legume mixtures are often associated with higher yields than the components grown as sole crops, but the underlying mechanisms are unclear. The study aims to evaluate how different cultivars in a two-species wheat-faba bean mixture influence above- and below-ground nitrogen (N) accumulation in the plant biomass, whether crop mixing affected the accumulation of other nutrients relative to the accumulation of N and phosphorus (P), and how the nutrient accumulation pattern in sole crops and mixtures is influenced by weed competition. Using a growth container experiment, we investigate nutrient accumulation patterns on specific wheat and faba bean cultivars grown as sole crops and mixtures, and with and without weed competition. We found that cereals in the mixture accumulated more N than in the sole crops, and the cultivar used influenced biomass accumulation in the legumes. Competition from weeds reduced the amount of plant N pools accumulated in the crop plant biomass. Based on stoichiometric scaling exponents, the plant neighbor affected the accumulation of other nutrients relative to the accumulation of N and P. These results are relevant for species and cultivar selection, all of which are important prerequisites for maximizing mixture performance.
  •  
5.
  •  
6.
  • Asplund, Linnea, et al. (författare)
  • Functional traits associated with nitrogen use efficiency in wheat
  • 2016
  • Ingår i: Acta Agriculturae Scandinavica, Section B - Soil and Plant Science. - : Informa UK Limited. - 0906-4710 .- 1651-1913. ; 66, s. 153-169
  • Tidskriftsartikel (refereegranskat)abstract
    • The association between functional traits and nitrogen use efficiency (NUE) was investigated to assist the breeding of nitrogen (N) use-efficient bread wheat (Triticum aestivum ssp. aestivum) varieties. This study combined results from a climate chamber experiment involving 41 spring wheat varieties and a field experiment involving six winter and six spring wheat varieties grown with and without the application of mineral N fertiliser. The climate chamber experiment was analysed by partial least squares (PLS) regression, with several predictors and NUE as response, to identify traits related to NUE. Specific hypotheses were then tested in the field experiment. The PLS indicated six traits of particular importance for overall NUE: leaf chlorophyll (SPAD value) of the top leaf at stem elongation, grains ear(-1), ears pot(-1), straw biomass pot(-1), days between emergence and anthesis, and days between emergence and completed senescence. In the field experiment, the SPAD value of flag leaves of winter wheat around anthesis was positively correlated with NUE and total grain N, at both N levels. Fast development was positively correlated with high NUE and N uptake efficiency in spring wheat. Early senescence of the flag leaf was positively correlated with grain N concentration and negatively correlated with grain-specific N efficiency in winter wheat at low N fertilisation levels. The results indicate that high SPAD value of the top leaf might be a candidate trait that could be used in wheat breeding for improved NUE, while genetic variation in senescence could possibly be used to tailor varieties for different end-use quality when grown at low N. More studies are needed to validate these findings in other environments and for other genotypes.
  •  
7.
  • Asplund, Linnea, et al. (författare)
  • Proof of concept: Nitrogen use efficiency of contrasting spring wheat varieties grown in greenhouse and field
  • 2014
  • Ingår i: Plant and Soil. - : Springer Science and Business Media LLC. - 0032-079X .- 1573-5036. ; 374, s. 829-842
  • Tidskriftsartikel (refereegranskat)abstract
    • Major aims were to test and evaluate a new concept for assessment of nitrogen use efficiency (NUE) of crops by growing six spring wheat varieties in greenhouse and field environments. NUE was calculated with a plant based concept integrating the entire crop life history and separating plant characteristics from environmental factors affecting NUE. Specific hypotheses were tested related to the varieties' drought and nutrient fertilisation responses for NUE components, and coherence of those responses in field and greenhouse.The wheat (Triticum aestivum L.) cultivated varieties 'Diskett', 'Granary', 'Quarna', 'Stilett', 'Vinjett', and a Swedish landrace ('Dala') were grown in field and greenhouse environments in Central Sweden. Two fertilisation treatments were included in a field and greenhouse experiment, and in the greenhouse also drought. The NUE components N uptake efficiency (U-N), grain-specific N efficiency (E-N,E-g) and grain N concentration (C-N,C-g) were assessed.Drought reduced yield and NUE through E-N,E-g, and more so when drought occurred prior to anthesis than after anthesis. Effect of fertilisation treatment on NUE components was similar in the two set-ups, but there were fewer variety x fertilisation interactions in the field. U-N was higher in the field and E-N,E-g was higher in the greenhouse, while C-N,C-g and overall NUE were similar in the two environments. Ranking of varieties regarding NUE and U-N was similar in the greenhouse and field, but different regarding E-N,E-g and C-N,C-g.The NUE concept is a useful tool to describe and integrate important NUE components for crops grown in different treatments (nutrient fertilisation, drought) and experimental set-ups, i.e. greenhouse and field. Similar variety ranking in overall NUE across experimental set-ups indicates stable results in different environments.
  •  
8.
  •  
9.
  • Asplund, Linnea, et al. (författare)
  • Swedish Spring Wheat Varieties with the Rare High Grain Protein Allele of NAM-B1 Differ in Leaf Senescence and Grain Mineral Content
  • 2013
  • Ingår i: PLoS ONE. - : Public Library of Science (PLoS). - 1932-6203. ; 8
  • Tidskriftsartikel (refereegranskat)abstract
    • Some Swedish spring wheat varieties have recently been shown to carry a rare wildtype (wt) allele of the gene NAM-B1, known to affect leaf senescence and nutrient retranslocation to the grain. The wt allele is believed to increase grain protein concentration and has attracted interest from breeders since it could contribute to higher grain quality and more nitrogen-efficient varieties. This study investigated whether Swedish varieties with the wt allele differ from varieties with one of the more common, non-functional alleles in order to examine the effect of the gene in a wide genetic background, and possibly explain why the allele has been retained in Swedish varieties. Forty varieties of spring wheat differing in NAM-B1 allele type were cultivated under controlled conditions. Senescence was monitored and grains were harvested and analyzed for mineral nutrient concentration. Varieties with the wt allele reached anthesis earlier and completed senescence faster than varieties with the non-functional allele. The wt varieties also had more ears, lighter grains and higher yields of P and K. Contrary to previous information on effects of the wt allele, our wt varieties did not have increased grain N concentration or grain N yield. In addition, temporal studies showed that straw length has decreased but grain N yield has remained unaffected over a century of Swedish spring wheat breeding. The faster development of wt varieties supports the hypothesis of NAM-B1 being preserved in Fennoscandia, with its short growing season, because of accelerated development conferred by the NAM-B1 wt allele. Although the possible effects of other gene actions were impossible to distinguish, the genetic resource of Fennoscandian spring wheats with the wt NAM-B1 allele is interesting to investigate further for breeding purposes.
  •  
10.
  • Berckx, Fede, et al. (författare)
  • Harnessing plant–microbe interactions to promote nitrogen use efficiency in cereal crops
  • 2024
  • Ingår i: Plant and Soil. - 0032-079X .- 1573-5036. ; 494, s. 75-83
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Increasing nitrogen (N) use efciency (NUE) can enhance cereal yields, improve grain quality and reduce agrochemical inputs. However, several challenges are associated with achieving enhanced NUE, e.g., a frequently poor synchronization between N supply and demand; low grain yields per unit of N input; and inherent trade-ofs between grain yield and quality. Scope: To address these challenges, we focus on the temporal perspective of NUE related processes at different growth stages, and propose the utilization of benefcial microbes, e.g. arbuscular mycorrhizal fungi (AMF) for their roles in afecting aspects of NUE particularly at the later development stages.Conclusion: Some evidence suggests that AMF can directly promote N uptake and use in cereals, by regulating N transporters, but the indirect efects of AMF on NUE related processes at diferent growth stages are poorly known. Here we explore AMF and their potential roles in promoting NUE related processes that enhance crop P and N uptake post-anthesis, when nutrient supply often is low. In order to fully exploit the opportunities for benefcial root-fungal symbiosis, we propose approaches for plant breeding and crop management, and consider the potential of plantmicrobe interactions post-anthesis to promote NUE and the sustainable production of especially cereals.
  •  
Skapa referenser, mejla, bekava och länka
  • Resultat 1-10 av 179
Typ av publikation
tidskriftsartikel (96)
konferensbidrag (45)
annan publikation (13)
forskningsöversikt (10)
bokkapitel (9)
rapport (6)
visa fler...
visa färre...
Typ av innehåll
refereegranskat (124)
övrigt vetenskapligt/konstnärligt (49)
populärvet., debatt m.m. (6)
Författare/redaktör
Rönnberg Wästljung, ... (21)
Vico, Giulia (19)
Fransson, Petra (16)
Berlin Kolm, Sofia (15)
Dimitriou, Ioannis (13)
visa fler...
Nordh, Nils-Erik (13)
Manzoni, Stefano (12)
Jäck, Ortrud (9)
Bergkvist, Göran (9)
Ghelardini, Luisa (9)
Bonosi, Lorenzo (8)
Aronsson, Pär (7)
Asplund, Linnea (7)
Karacic, Almir (6)
Ajal, James (6)
Westerbergh, Anna (6)
Hallingbäck, Henrik (6)
Beyer, Friderike (6)
Gyllenstrand, Niclas (5)
Liu, Hui (5)
Nkurunziza, Libére (5)
Eckersten, Henrik (5)
Adler, Anneli (4)
Björkman, Christer (4)
Fogelqvist, Johan (4)
Berghuijs, Herman (4)
Stenlid, Jan (3)
Kirchmann, Holger (3)
Hansson, Per-Anders (3)
Åhman, Inger (3)
Lagercrantz, Ulf (3)
Ingvarsson, Pär (3)
Johansson, Tord (2)
Von Arnold, Sara (2)
Hansson, Helena (2)
Eriksson, Jan (2)
Herrmann, Anke (2)
Schnürer, Anna (2)
Sandgren, Mats (2)
Pucholt, Pascal (2)
Sjödin, Per (2)
Berndes, Göran, 1966 (2)
Samils, Berit (2)
Keller, Thomas (2)
Manevska Tasevska, G ... (2)
Baum, C (2)
Baum, S. (2)
Schulz, U. (2)
Lamersdorf, N. (2)
visa färre...
Lärosäte
Sveriges Lantbruksuniversitet (179)
Stockholms universitet (7)
Uppsala universitet (5)
Chalmers tekniska högskola (2)
RISE (2)
Umeå universitet (1)
visa fler...
Högskolan i Gävle (1)
Linköpings universitet (1)
Lunds universitet (1)
visa färre...
Språk
Engelska (175)
Svenska (3)
Tyska (1)
Forskningsämne (UKÄ/SCB)
Lantbruksvetenskap (179)
Naturvetenskap (42)
Teknik (5)
Samhällsvetenskap (2)

År

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