کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4426259 1309121 2008 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Anatomical element localization by EDXS in Grevillea exul var. exul under nickel stress
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Anatomical element localization by EDXS in Grevillea exul var. exul under nickel stress
چکیده انگلیسی

Grevillea exul var. exul, an endemic serpentinic Proteaceae of New Caledonia, was chosen to study the spatial distribution of Ni because this species supports strong content of metals, which can allow important absorptions thus detectable by microanalysis. Fine transversal sections of axenic G. exul var. exul plants grown during 15 days on nickel sulphate medium were examined by EDXS microanalysis. It showed that in Ni treated plants, Ni was concentrated mostly in the phloem compared to the xylem and the epidermis, either in roots or in the basal part of the stems and was mostly in the epidermis in the upper part of the stems and not detectable in the leaves. This metal took the place of P and K in the treated plants whereas the localization of these macroelements was quite uniform in control sections. We assume that a mechanism of phloem loading is implicated to restrict Ni accumulation in G. exul var. exul.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Environmental Pollution - Volume 156, Issue 3, December 2008, Pages 1156–1163
نویسندگان
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