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Effects of iron oxide nanoparticles on foliage development of red radish (Raphanus sativus) and bok choy (Brassica rapa)

This study reports on the effects of FeNPs on foliage development of two common vegetables, red radish (Raphanus sativus) and bok choy (Brassica rapa). It showed that radish was not affected by the nanoparticles regardless exposure scenarios. The developmental rate of bok choy, however, showed increased with FeNPs concentration in the scenario that seeds were pre-soaked in water before sowing on medium containing FeNPs. | Journal of Science & Technology 126 (2018) 049-053 Effects of iron oxide nanoparticles on foliage development of red radish (Raphanus sativus) and bok choy (Brassica rapa) Duong Thi Huong1, Takaaki Kurihara2, Yoshihiko Inagaki2, Yutaka Sakakibara2, Dang Minh Hieu1,* 1 Hanoi University of Science and Technology – No. 1, Dai Co Viet Str., Hai Ba Trung, Ha Noi, Viet Nam 2 Department of Civil and Environment Engineering, Waseda University, Tokyo, Japan Received: April 06, 2018; Accepted: June 25, 2018 Abstract Nanomaterials have been using in many applications covering many different aspects in life. Among nanomaterials, iron oxide nanoparticles (FeNPs) have been considered relatively safe, and appeared in number of applications from medical, health to environmental applications. This booming in using FeNPs leads to the appearance of them in different water bodies that might end up lately in plants and animals. This study reports on the effects of FeNPs on foliage development of two common vegetables, red radish (Raphanus sativus) and bok choy (Brassica rapa). It showed that radish was not affected by the nanoparticles regardless exposure scenarios. The developmental rate of bok choy, however, showed increased with FeNPs concentration in the scenario that seeds were pre-soaked in water before sowing on medium containing FeNPs. In the experimental scenario that seeds were soaked in solutions containing FeNPs before sowing on nanoparticle-free medium, it showed retardation in the developmental rate of the seeds. Keywords: iron oxide nanoparticles, foliage development, radish, bok choy. 1. Introduction nanomaterials could end up in environmental bodies infesting drinking water sources harming the health of humans and animals as well as placing impacts on ecosystems. Among nanomaterials, iron nanomaterials of different forms could be found predominantly in various applications from medicine [3-6] to environmental sector [2,7]. It therefore could be more chance for iron