کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4426650 1309132 2008 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Toxic effects of arsenic on Sinorhizobium–Medicago sativa symbiotic interaction
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Toxic effects of arsenic on Sinorhizobium–Medicago sativa symbiotic interaction
چکیده انگلیسی

Recently, the Rhizobium–legume symbiotic interaction has been proposed as an interesting tool in bioremediation. However, little is known about the effect of most common contaminants on this process. The phytotoxic effects of arsenic on nodulation of Medicago sativa have been examined in vitro using the highly arsenic resistant and symbiotically effective Sinorhizobium sp. strain MA11. The bacteria were able to grow on plates containing As concentrations as high as 10 mM. Nevertheless, as little as 25–35 μM arsenite produced a 75% decrease in the total number of nodules, due to a 90% reduction in the number of rhizobial infections, as could be determined using the strain MA11 carrying a lacZ reporter gene. This effect was associated to root hair damage and a shorter infective root zone. However, once nodulation was established nodule development seemed to continue normally, although earlier senescence could be observed in nodules of arsenic-grown plants.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Environmental Pollution - Volume 154, Issue 2, July 2008, Pages 203–211
نویسندگان
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