Lr. Nissen et Nw. Lepp, BASE-LINE CONCENTRATIONS OF COPPER AND ZINC IN SHOOT TISSUES OF A RANGE OF SALIX SPECIES, Biomass & bioenergy, 12(2), 1997, pp. 115-120
Citations number
21
Categorie Soggetti
Energy & Fuels",Forestry,"Biothechnology & Applied Migrobiology
Background concentrations of Cu and Zn in bark, leaves, twigs and wood
of eight species of Salix (willow) growing on the same soil type were
investigated. It was found that the concentrations of Cu and Zn varie
d between plant parts and between species. There was no consistent pat
tern of metal concentration. Copper concentrations decreased in the or
der twigs > leaves > wood, bark, and those of Zn in the order Leaves >
bark > twigs > wood. The eight species did not show a common uptake p
attern for the two metals. S. x sericans and S. cinerea had high conce
ntrations of both metals; S. purpurea had high concentrations of Zn bu
t low concentrations of Cu, whilst S. fragilis and S. viminalis had lo
w concentrations of both metals. Concentration factors for both elemen
ts in shoot tissues were consistent, despite the variations in associa
ted metal concentrations. A general trend of exclusion of Cu and conce
ntration of Zn was evident. More Cu than Zn was fixed in woody tissue.
(C) 1997 Elsevier Science Ltd.