Repozitorij Univerze v Novi Gorici

Iskanje po repozitoriju
A+ | A- | Pomoč | SLO | ENG

Iskalni niz: išči po
išči po
išči po
išči po
* po starem in bolonjskem študiju

Opcije:
  Ponastavi


1 - 5 / 5
Na začetekNa prejšnjo stran1Na naslednjo stranNa konec
1.
2.
Temporal and spatial patterns of zinc and iron accumulation during barley (Hordeum vulgare L.) grain development. Journal of agricultural and food chemistry.
Amelie Detterbeck, Paula Pongrac, Daniel Persson, Iztok Arčon, Primož Pelicon, Primož Vaupetič, Mitja Kelemen, Søren Husted, Katarina Vogel-Mikuš, Stephan Clemens, Jan Kofod Shjoerring, 2020, izvirni znanstveni članek

Opis: Breeding and engineering of biofortified crops will benefit from a better understanding of bottlenecks controlling micronutrient loading within the seeds. However, few studies have addressed the changes in micronutrient concentrations, localization, and speciation occurring over time. Therefore, we studied spatial patterns of zinc and iron accumulation during grain development in two barley lines with contrasting grain zinc concentrations. Microparticle-induced-X-ray emission and laser ablationinductively coupled plasma mass spectrometry were used to determine tissue-specific accumulation of zinc, iron, phosphorus, and sulfur. Differences in zinc accumulation between the lines were most evident in the endosperm and aleurone. A gradual decrease in zinc concentrations from the aleurone to the underlying endosperm was observed, while iron and phosphorus concentrations decreased sharply. Iron co-localized with phosphorus in the aleurone, whereas zinc co-localized with sulfur in the sub-aleurone. We hypothesize that differences in grain zinc are largely explained by the endosperm storage capacity. Engineering attempts should be targeted accordingly.
Najdeno v: osebi
Ključne besede: barley (Hordeum vulgare L.), biofortification, grain development, grain loading, LA-ICP-MS, μ-PIXE
Objavljeno: 20.10.2020; Ogledov: 704; Prenosov: 0
.pdf Polno besedilo (4,76 MB)

3.
X-ray spectrometry in plant biology
Primož Pelicon, Peter Kump, Anja Kavčič, Alojz Kodre, Iztok Arčon, Katarina Vogel-Mikuš, 2018, objavljeni povzetek znanstvenega prispevka na konferenci (vabljeno predavanje)

Opis: Trace elements are essential components of living systems, but at the same time they can be toxic at concentrations beyond those necessary for their biological functions. In addition, the toxicity can be extended to other non-essential elements of very similar atomic characteristics that can mimic the properties of a trace element. Trace element malnutrition affects more than half of the world’s population, while on the other hand industrialization, traffic and extensive use of fertilizers have resulted in exceedingly high concentrations of non-essential elements in food crops, posing risks to human health. In order to be able to develop and improve phyto-technologies that enable production of safe and quality food, knowledge on the basic mechanisms involved in trace and non-essential element uptake, transport, accumulation and ligand environment in plants is needed. Such studies are nowadays supported by highly sophisticated X-ray based techniques, such as synchrotron based X-ray fluorescence spectrometry, proton induced X-ray emission and X-ray absorption spectroscopy, enabling imaging of element distribution and determination of speciation and ligand environment of trace elements in biological tissues and cells with high spatial resolution and sensitivity. Selected case studies of metal distribution and speciation in selected model and crop plants, achieved by interdisciplinary work, will be presented.
Najdeno v: osebi
Ključne besede: X-ray spectrometry, plants, XANES, EXAFS
Objavljeno: 12.09.2018; Ogledov: 1549; Prenosov: 0
.pdf Polno besedilo (62,44 KB)

4.
5.
Iskanje izvedeno v 0 sek.
Na vrh