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Titolo:
QUANTITATIVE MICRO-PIXE COMPARISON OF ELEMENTAL DISTRIBUTION IN NI-HYPERACCUMULATING AND NON-ACCUMULATING GENOTYPES OF SENECIO-CORONATUS
Autore:
MESJASZPRZYBYLOWICZ J; PRZYBYLOWICZ WJ; PROZESKY VM; PINEDA CA;
Indirizzi:
NATL ACCELERATOR CTR,VAN DE GRAAFF GRP,POB 72 ZA-7131 FAURE SOUTH AFRICA GROOTE SCHUUR HOSP ZA-7925 CAPE TOWN SOUTH AFRICA
Titolo Testata:
Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms
fascicolo: 1-4, volume: 130, anno: 1997,
pagine: 368 - 373
SICI:
0168-583X(1997)130:1-4<368:QMCOED>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
PROTON MICROPROBE; SERPENTINE FLORA;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
24
Recensione:
Indirizzi per estratti:
Citazione:
J. Mesjaszprzybylowicz et al., "QUANTITATIVE MICRO-PIXE COMPARISON OF ELEMENTAL DISTRIBUTION IN NI-HYPERACCUMULATING AND NON-ACCUMULATING GENOTYPES OF SENECIO-CORONATUS", Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 130(1-4), 1997, pp. 368-373

Abstract

The Ni hyperaccumulator, plant species Senecio coronatus (Thunb. ) Harv., Asteraceae is an example of plant adaptation mechanisms to different ecological conditions. This widespread species can inter alia be found on serpentine outcrops and the genotypes growing in serpentine soils show different ways of adaptation. The populations from two distantlocalities take up and translocate Ni in concentrations which are normally phytotoxic, while plants growing on a different site, in the vicinity of another hyperaccumulating species, absorb amounts which are typical for most of the plants found on serpentine soils. The NAC nuclear microprobe was used to compare the distribution of Ni and other elements in selected organs and cells with simultaneous use of PIXE and proton BackScattering (BS). Quantitative maps of stems showed large differences in concentrations and distributions of major and trace elements. In hyperaccumulating genotypes Ni is present everywhere within stem tissues, but the highest concentrations were found in the epidermis,cortex and phloem. In non-accumulating plants Ni was concentrated in the phloem. In the leaf epidermis Ni was concentrated in the cell walls for both accumulating and non-accumulating plants. These results suggest that biochemical diversity is more than morphological, because investigated genotypes belong to the same taxon. (C) 1997 Elsevier Science B.V.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 07/08/20 alle ore 21:09:14