Differences in X-ray absorption due to cadmium treatment in Saponaria officinalis leaves.
A method for detecting cadmium uptake in leaves of Saponaria officinalis doped with a solution of cadmium acetate is described. The technique based on the exposure of dried leaves to X-rays of a wavelength close to that of the metal K-edge could be useful for phytoremediation studies as it could reveal the bioaccumulation in plants due to the treatment either in vivo or in vitro with heavy metals. X-ray microradiography measurements are in agreement with those from peroxidase enzyme assay utilized to follow the oxidative damage induced by heavy metals. At present, as we will see in this report, microradiography has still poorer sensitivity in comparison with enzyme assay, but it has the advantage of being faster, not destructive, and usable even at very high doping levels, where the enzyme assay technique results are fully saturated. Further analysis of the optical density values could lead to a quantitative measurement of the heavy metal in the sample. Thus, the technology developed in this article could be useful for tracing the intake in phytoremediation studies.
Reale
Lucia
L
Università di L'Aquila, Dipartimento di Fisica and INFM,INFN-LNGS, 67010, Coppito L'Aquila, Italy. Lucia.Reale@tiscali.it
Lai
Antonia
A
Tucci
Adele
A
Poma
Anna
A
Faenov
Anatoly
A
Pikuz
Tania
T
Flora
Francesco
F
Spano
Laura
L
Limongi
Tania
T
Palladino
Libero
L
Ritucci
Antonio
A
Tomassetti
Giuseppe
G
Petrocelli
Giovanni
G
Francucci
Massimo
M
Martellucci
Sergio
S
D000042:Absorption; D000085:Acetates / Q000378:metabolism*; D002104:Cadmium / Q000378:metabolism*; D008852:Microradiography / Q000379:methods*; D009195:Peroxidase / Q000378:metabolism; D018515:Plant Leaves / Q000378:metabolism / Q000528:radiation effects*; D029750:Saponaria / Q000378:metabolism / Q000528:radiation effects*; D014965:X-Rays
D000085:Acetates; D002104:Cadmium; C028031:cadmium acetate; D009195:Peroxidase