کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6493790 | 44426 | 2015 | 36 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of elevated ultraviolet radiation on primary metabolites in selected alpine algae and cyanobacteria
ترجمه فارسی عنوان
اثرات تابش اشعه ماوراء بنفش بر متابولیت های اولیه در جلبک های آلپ و سینو باکتری ها
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بیو مهندسی (مهندسی زیستی)
چکیده انگلیسی
Extremophilic green algae and cyanobacteria are the most abundant species in high mountain habitats, where rough climate conditions such as temperature differences, limited water retention and high ultraviolet (UV) radiation are the cause for a restricted biological diversity in favor of a few specialized autotrophic microorganisms. In this study, we investigated four algal species from alpine habitat in a sun simulator for their defense strategies in response to UV-A radiation (315-400Â nm) up to 13.4Â W/m2 and UV-B radiation (280-315Â nm) up to 2.8Â W/m2. Besides changes in pigment composition we discovered that primary polar metabolites like aromatic amino acids, nucleic bases and nucleosides are increasingly produced when the organisms are exposed to elevated UV radiation. Respective compounds were isolated and identified, and in order to quantify them an HPLC-DAD method was developed and validated. Our results show that especially tyrosine and guanosine were found to be generally two to three times upregulated in the UV-B exposed samples compared to the non-treated control.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Photochemistry and Photobiology B: Biology - Volume 149, August 2015, Pages 149-155
Journal: Journal of Photochemistry and Photobiology B: Biology - Volume 149, August 2015, Pages 149-155
نویسندگان
Anja Hartmann, Andreas Albert, Markus Ganzera,