Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/3304
Title: Nickel and cadmium toxicity and enzymatic activity in nitolerant and non-tolerant populations of Silene italica pers
Authors: Mattioni, C
Gabbrielli, R
VANGRONSVELD, Jaco 
CLIJSTERS, Herman 
Issue Date: 1997
Publisher: GUSTAV FISCHER VERLAG
Source: JOURNAL OF PLANT PHYSIOLOGY, 150(1-2). p. 173-177
Abstract: Ni2+ and Cd2+ toxicity and effects on the activity of glucose-6-phosphate dehydrogenase (G6PDH, EC 1.1.1.49), glutamate dehydrogenase (GDH, EC 1.4.1.2), malic enzyme (ME, EC 1.1.1.40), and isocitrate dehydrogenase (ICDH, EC 1.1.1.42) were evaluated in two populations of Silene italica, a Ni-tolerant ecotype from serpentine soils very low in Cd2+, and a population sensitive to both Ni2+ and Cd2+ and originating from a normal soil. The Ni-tolerant population is more tolerant to both metals than the ecotype originating from a normal soil. Both Ni2+ and Cd2+ assimilation induce a stronger increase of G6PDH, GDH, and ICDH activity in the Ni-tolerant than in the Ni-sensitive population. In the Ni-tolerant population Cd2+ stimulates the activity of ME, GDH, and G6PDH to a greater extent than Ni2+ does. Our results suggest that the tolerant population reacts better than the sensitive one to the toxic metal concentrations; the effects on the enzyme activities described may be involved in the response to metal stress conditions.
Notes: LIMBURGS UNIV CTR,LAB BOT,B-3590 DIEPENBEEK,BELGIUM.Mattioni, C, UNIV FLORENCE,DIPARTIMENTO BIOL VEGETALE,LAB FISIOL VEGETALE,I-50121 FLORENCE,ITALY.
Keywords: Silene italica; Ni2+; Cd2+; tolerance; glucose-6-phosphate dehydrogenase; glutamate dehydrogenase; isocitrate dehydrogenase; malic enzyme
Document URI: http://hdl.handle.net/1942/3304
ISI #: A1997WJ03100027
Type: Journal Contribution
Appears in Collections:Research publications

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