کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4421842 1308523 2010 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Tolerance of arsenate-induced stress in Aspergillus niger, a possible candidate for bioremediation
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Tolerance of arsenate-induced stress in Aspergillus niger, a possible candidate for bioremediation
چکیده انگلیسی

The arsenate tolerance limit in wild-type Aspergillus niger was determined. Because of its high tolerance, toxic effects of arsenate concentrations ranging from 25 to 100 mg/L were investigated in regard to growth, intracellular thiols, proline and malondialdehyde (MDA) contents of wild-type A. niger. Cellular arsenate uptake was analyzed. Activities of catalase (CAT), superoxide dismutase (SOD), glutathione reductase (GR) and succinate dehydrogenase (SDH) were assayed. Growth of A. niger increased at 25 mg/L arsenate, and it survived up to 100 mg/L. MDA, intracellular thiol and proline contents increased up to a certain level. Activities of GR, SOD and CAT declined following a rise at low concentration(s); SDH activity decreased gradually with increased arsenate stress. Results indicated that A. niger had high arsenate uptake potential and could tolerate oxidative stress by manipulating its anti-oxidative defense mechanism, a property that may be exploited for removal of arsenate from contaminated aqua-environment.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ecotoxicology and Environmental Safety - Volume 73, Issue 2, February 2010, Pages 172–182
نویسندگان
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