کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4407876 1618822 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect and localization of phenanthrene in maize roots
ترجمه فارسی عنوان
اثر و موضع گیری فنانترن در ریشه ذرت
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
چکیده انگلیسی


• Phenanthrene exposure induces perturbations of maize roots maturation.
• Early exposure induces extensive deposition of suberin on exodermis and endodermis.
• Phenanthrene was only patchily located within roots and near suberized exodermis or endodermis.

Polycyclic aromatic hydrocarbons (PAHs) have a toxic effect on plants, which limits the efficiency of phytomanagement of contaminated soils. The mechanisms underlying their toxicity are not fully understood. A cultivation experiment was carried out with maize, used as model plant, exposed to sand spiked with phenanthrene (50 or 150 mg kg−1 dw). Epi-fluorescence microscopic observation of root sections was used to assess suberization of exodermis and endodermis and phenanthrene localization along the primary root length. For 10 days of cultivation, exodermis and endodermis suberization of exposed maize was more extensive. However, after 20 days of exposure, exodermis and endodermis of non-exposed roots were totally suberized, whilst PHE-exposed roots where less suberized. Early extensive suberization may act as barrier against PHE penetration, however longer exposure inhibits root maturation. Phenanthrene patches were located only near suberized exodermis and endodermis, which may therefore act as retention zones, where the hydrophobic phenanthrene accumulates during its radial transport.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 149, April 2016, Pages 130–136
نویسندگان
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