کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2008943 1541769 2016 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Differential effects of glyphosate and aminomethylphosphonic acid (AMPA) on photosynthesis and chlorophyll metabolism in willow plants
ترجمه فارسی عنوان
اثر متفاوت گلیفوسیت و aminomethylphosphonic اسید (AMPA) بر فتوسنتز و متابولیسم کلروفیل در گیاهان willow
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم زراعت و اصلاح نباتات
چکیده انگلیسی


• We studied glyphosate and AMPA effects on willow leaf physiology.
• The differential effects of glyphosate and AMPA on the chlorophyll metabolism were proposed.
• AMPA disturbed chlorophyll biosynthesis.
• Glyphosate induced chlorophyll degradation through oxidative damages.

We used a willow species (Salix miyabeana cultivar SX64) to examine the differential secondary-effects of glyphosate and aminomethylphosphonic acid (AMPA), the principal glyphosate by-product, on chlorophyll metabolism and photosynthesis. Willow plants were treated with different concentrations of glyphosate (equivalent to 0, 1.4, 2.1 and 2.8 kg ha− 1) and AMPA (equivalent to 0, 0.28, 1.4 and 2.8 kg ha− 1) and evaluations of pigment contents, chlorophyll fluorescence, and oxidative stress markers (hydrogen peroxide content and antioxidant enzyme activities) in leaves were performed after 12 h of exposure. We observed that AMPA and glyphosate trigger different mechanisms leading to decreases in chlorophyll content and photosynthesis rates in willow plants. Both chemicals induced ROS accumulation in willow leaves although only glyphosate-induced oxidative damage through lipid peroxidation. By disturbing chlorophyll biosynthesis, AMPA induced decreases in chlorophyll contents, with consequent effects on photosynthesis. With glyphosate, ROS increases were higher than the ROS-sensitive threshold, provoking chlorophyll degradation (as seen by pheophytin accumulation) and invariable decreases in photosynthesis. Peroxide accumulation in both AMPA and glyphosate-treated plants was due to the inhibition of antioxidant enzyme activities. The different effects of glyphosate on chlorophyll contents and photosynthesis as described in the literature may be due to various glyphosate:AMPA ratios in those plants.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Pesticide Biochemistry and Physiology - Volume 130, June 2016, Pages 65–70
نویسندگان
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