Fate of nickel in seedlings of Berkheya coddii during germination. - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Poster De Conférence Année : 2011

Fate of nickel in seedlings of Berkheya coddii during germination.

Résumé

Little is known about Ni storage in seeds of hyperaccumulating plants and its possible role in the first stages of plant development. The aim of this study was to determine Ni distribution in seeds and seedlings during germination and to test its role during germination with and without an external Ni supply. Field-harvested seeds from the South African Ni-hyperaccumulator Berkheya coddii Roessler were germinated either in Ni-free deionised water or in ultramafic soil. Sections of seeds and seedlings were analyzed using micro-proton induced X-ray emission (micro-PIXE) in order to localise Ni and other elements. Results show that high amounts of Ni were stored within the seeds. In germinating seeds, Ni was located in different parts: the lower epidermis, margins of cotyledons, and the pericarp in the micropylar area. The Ni and Ca were not mobilised during germination sensu stricto. Emergence of the first leaf seemed to trigger the translocation of Ni and Ca within the seedling. Besides, no effect of Ni supply from soil on its redistribution could be established for the germination stage.
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Dates et versions

hal-01486467 , version 1 (09-03-2017)

Identifiants

  • HAL Id : hal-01486467 , version 1
  • PRODINRA : 345035

Citer

Sophie Groeber, Guillaume Echevarria, W. Przybyłowicz, Emmanuelle Montarges-Pelletier, Alban Barnabas, et al.. Fate of nickel in seedlings of Berkheya coddii during germination.. 7th International Conference on Serpentine Ecology, Jun 2011, Coimbra, Portugal. 2011. ⟨hal-01486467⟩
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