کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6312236 1618963 2014 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The long-term effect of zinc soil contamination on selected free amino acids playing an important role in plant adaptation to stress and senescence
ترجمه فارسی عنوان
اثر طولانی مدت آلودگی روی اسیدهای آمینه آزاد که نقش مهمی در سازگاری گیاه با استرس و پیری دارند
کلمات کلیدی
آمینو اسید، سیتوکینین ها، گیاه، زناشویی، عنصر سمی،
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
چکیده انگلیسی
Increased endogenous plant cytokinin (CK) content through transformation with an isopentyl transferase (ipt) gene has been associated with improved plant stress tolerance. The objective of this study is to determine amino acid changes associated with elevated CK production in ipt transgenic tobacco (Nicotiana tabacum L., cv. Wisconsin 38). Nontransformed (WT) and transformed tobacco plants with ipt gene controlled by senescence-activated promoter (SAG) were exposed to zinc soil contamination (tested levels Zn1=250, Zn2=500, Zn3=750 mg kg−1 soil). The Zn effect on plant stress metabolism resulted in changes in levels of selected free amino acids playing an important role in adaptation to stress and plant senescence (alanine, leucine, proline, methionine and γ-aminobutyrate) and differed for transformed and nontransformed tobacco plants. Analyses of amino acids confirmed that SAG tobacco plants had improved zinc tolerance compared with the WT plants. The enhanced Zn tolerance of SAG plants was associated with the maintenance of accumulation of proline, methionine and γ-aminobutyrate. The concentrations of leucine and alanine did not show significant differences between plant lines.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ecotoxicology and Environmental Safety - Volume 100, February 2014, Pages 166-170
نویسندگان
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