کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4426661 1309132 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Timing of phosphate application affects arsenic phytoextraction by Pteris vittata L. of different ages
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Timing of phosphate application affects arsenic phytoextraction by Pteris vittata L. of different ages
چکیده انگلیسی

The effects of timing in phosphate application on plant growth and arsenic removal by arsenic hyperaccumulator Pteris vittata L. of different ages were evaluated. The hydroponic experiment consisted of three plant ages (A45d, A90d and A180d) and three P feeding regimens (P200+0, P134+66 and P66+134) growing for 45 d in 0.2-strength Hoagland–Arnon solution containing 145 μg L−1 As. While all plants received 200 μM P, P was added in two phases: during acclimation and after arsenic exposure. High initial P-supply (P200+0) favored frond biomass production and plant P uptake, while split-P application (P134+66 and P66+134) favored plant root production. Single P addition favored arsenic accumulation in the roots while split-P addition increased frond arsenic accumulation. Young ferns (A45d) in treatment P134+66 were the most efficient in arsenic removal, reducing arsenic concentration to below 10 μg L−1 in 35 d. The results indicated that the use of young ferns, coupled with feeding of low initial P or split-P application, increased the efficiency of arsenic removal by P. vittata.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Environmental Pollution - Volume 154, Issue 2, July 2008, Pages 306–311
نویسندگان
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