کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10876911 | 1075787 | 2014 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Rescue of heavy metal effects on cell physiology of the algal model system Micrasterias by divalent ions
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کلمات کلیدی
EELSFe-EDTAPS IIESIUPLC-MSGSHROS - ROSAscorbic acid - آسکوربیک اسیدAntioxidants - آنتی اکسیدانIron - آهنSalicylic acid - اسید سالیسیلیکTem - این استIons - ایون هاElectron spectroscopic imaging - تصویربرداری اسپکتروسکوپی الکترونیGreen algae - جلبک سبزLead - سربElectron energy loss spectroscopy - طیف سنجی از دست دادن انرژی الکترونPhotosystem II - فتوسیستم 2Zinc - فلز رویHeavy metals - فلزات سنگینTransmission electron microscopy - میکروسکوپ الکترونی عبوریCadmium - کادمیمChromium - کروم، فلزی سخت و خاکستری رنگ high-performance liquid chromatography - کروماتوگرافی مایعی کاراHPLC - کروماتوگرافی مایعی کاراCalcium - کلسیمGadolinium - گادولینیمGlutathione - گلوتاتیونReactive oxygen species - گونههای فعال اکسیژن
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم زراعت و اصلاح نباتات
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The divalent ions of iron, zinc and calcium were able to diminish the effects of the metals cadmium, chromium and lead on Micrasterias. Iron showed most ameliorating effects on cadmium and chromium in short- and long-term treatments and improved cell morphogenesis, ultrastructure, cell division rates and photosynthesis. Analytical transmission electron microscopic (TEM) methods (electron energy loss spectroscopy (EELS) and electron spectroscopic imaging (ESI)) revealed that chromium uptake was decreased when Micrasterias cells were pre-treated with iron, which resulted in no longer detectable intracellular chromium accumulations. Zinc rescued the detrimental effects of chromium on net-photosynthesis, respiration rates and electron transport in PS II. Calcium and gadolinium were able to almost completely compensate the inhibiting effects of lead and cadmium on cell morphogenesis after mitosis, respectively. These results indicate that cadmium is taken up by calcium and iron transporters, whereas chromium appears to enter the algae cells via iron and zinc carriers. It was shown that lead is not taken up into Micrasterias at all but exerts its adverse effects on cell growth by substituting cell wall bound calcium. The antioxidants salicylic acid, ascorbic acid and glutathione were not able to ameliorate any of the investigated metal effects on the green alga Micrasterias when added to the culture medium.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Plant Physiology - Volume 171, Issue 2, 15 January 2014, Pages 154-163
Journal: Journal of Plant Physiology - Volume 171, Issue 2, 15 January 2014, Pages 154-163
نویسندگان
Stefanie Volland, Elisabeth Bayer, Verena Baumgartner, Ancuela Andosch, Cornelius Lütz, Evelyn Sima, Ursula Lütz-Meindl,