Conclusion Of Nanotechnology

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Aims and Scope: Nowadays, nanotechnology is used in many different sciences. Plants are no exception. Therefore, we decided to study the beneficial effect of titanium dioxide and titanium dioxide nanoparticles phytotoxicity on some physiological characteristics of Melissa officinalis plant including germination, root length, shoot length, and photosynthetic pigments. The experiment was conducted in 2013 in the Research Laboratory of Islamic Azad University of Falavarjan, Isfahan, Iran.
Methodology: Seeds were treated with solutions of titanium dioxide and titanium dioxide nanoparticle in 4 replicates. The obtained results were the mean of 4 replicates ± SD. Finally the results were analyzed using SPSS18 statistical software.
Results: Results indicated that different treatments of TiO2 and N-TiO2 compared to the control group had no significant effect on germination percentage. However, they had a positive effect on root length, shoot length, and photosynthetic pigments (chlorophylls and carotenoids).
Conclusion: At low concentrations, titanium dioxide nanoparticles and titanium dioxide had a stimulatory effect on all parameters except the germination.

Introduction
Nowadays as the population grows increasingly, the need for food and medicine also increases. Meanwhile, in order to meet their basic needs, human societies have turned to different plants. And so far several studies have been conducted so as to get the most out of plants in different food and medical fields. On the other hand, with the advancement of different sciences, we witness the use of a variety of conditions for better growth of plants. One of these sciences which has had increasing developments in the last century is nanotechnology. In recent years, Nanotechnol...

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...th and stated its cause shoot biomass due to a lower one (Samadi et al., 2014). However, in our study increased stem length.
Since both lemon balm and mint are of Lamiaceae family can be concluded that TiO2 and N-TiO2 have no effect on the germination of plants in this family and causes to reduce germination compared to control. But it causes to increase in photosynthetic pigments and root length. Still, the study shows effects of TiO2 and N-TiO2 on Melissa officinalis, but to understand the positive and negative effects of nanoparticles on other physiological characteristics of Melissa Officinalis requires further investigation. It is necessary to examine aspects of its growth affected of nanoparticles and then release to market. Because, lemon balm plant is known among people and its use is very common as a food and medicine, particularly in traditional societies.

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