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|Title: ||Nickel and cadmium toxicity and enzymatic activity in nitolerant and non-tolerant populations of Silene italica pers|
|Authors: ||Mattioni, C|
|Issue Date: ||1997|
|Publisher: ||GUSTAV FISCHER VERLAG|
|Citation: ||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 18.104.22.168), glutamate dehydrogenase (GDH, EC 22.214.171.124), malic enzyme (ME, EC 126.96.36.199), and isocitrate dehydrogenase (ICDH, EC 188.8.131.52) 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.|
|ISI #: ||A1997WJ03100027|
|Type: ||Journal Contribution|
|Appears in Collections: ||Research publications|
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