Elemental distribution in Senecio anomalochrous, a Ni hyperaccumulator from South Africa
Year: 2001
Type: article
Abstract: Senecio sp. aff. S. anomalochrousl/Ig Hilliard (Balkwill 6869 J) Asteraceae, one of five Ni hyperaccumulators in South Africa, was
collected from serpentine outcrops near Kaapsehoop Chrysotile
Mine (Mpumalanga). Bulk analysis of freeze-dried materials was
done by ICP-AES. Studies of two-dimensional elemental distributions
were performed using the NAC nuclear microprobe. A
gradient of concentrations, increasing from root to leaf, was
observed. The highest Ni enrichment was found in the leaf; this is
typical of hyperaccumulators. Elemental maps of Ni from leaf
cross-sections showed that Ni was present everywhere in the leaf
tissue, but in different concentrations. The association of Ni with
certain tissues, such as the epidermis, was clearly visible, similar to
the trend of Ni concentration in other hyperaccumulators from
South Africa, Senecio coronatusl/Ig and Berkheya zeyheril/Ig subsp.
lIgrehmaniil/Ig var. rogersiana . The relationships between Ni and other
elements were also investigated.
Source: South African Journal of Science
Language: English
Topic: Heavy Metals in Plants
Subfield: Analytical Chemistry
Field: Chemistry
Domain: Physical Sciences
SDG: Zero hunger
Open Access status: diamond
OpenAlex ID: W2518909802