Titanium dioxide nanoparticles uptake by aquatic plant Spirodela polyrrhiza and its effect onsome of physiological indices
سال انتشار: 1393
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 666
فایل این مقاله در 7 صفحه با فرمت PDF قابل دریافت می باشد
- صدور گواهی نمایه سازی
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
ICNN05_001
تاریخ نمایه سازی: 30 آبان 1394
چکیده مقاله:
TiO2 nanoparticles (NPs) are one of the most produced nanoparticles in the world. In this work, the toxicityof TiO2 nanoparticles on the aquatic plant species Spirodela polyrrhiza was studied, because of significant entrance ofthese nanoparticles into the environment, especially aquatic ecosystems. Characteristics of used TiO2 nanoparticles weredetermined by using x-ray diffraction and Brunauer–Emmett–Teller (BET) method. According to the previous reports,nanomaterials induce oxidative stress and cause producing reactive oxygen species (ROS). In the present study, some ofantioxidant enzymes, as well as, relative frond number (RFN) and photosynthesis pigments as physiological indices, wereassessed to explore the effects of TiO2 nanoparticles on S. polyrrhiza. Entrance of nanoparticles to plant was recognizedusing fluorescent microscopic images from plant roots. RFN, photosynthesis pigments content and the activity ofperoxidase was decreased after treatment of nanoparticles, however superoxide dismutase activity was increased andcatalase activity did not have significant difference with control plants. Enhance of superoxide dismutase activity couldbe explained as promoting antioxidant system to scavaiging the ROS. Reduced peroxidase activity could be attributed tothe either direct effect of these particles on the molecular structure of this enzyme or plant defense system damage dueROS.
کلیدواژه ها:
نویسندگان
M Abedi
Department of Plant Biology, Tabriz University, Tabriz, Iran
A Movafeghi
Department of Applied Chemistry, Tabriz University, Tabriz, Iran
A.R Khataee
cDepartment of Horticultural Science, Tabriz University, Tabriz, Iran