Wheat seedlings traits as affected by soaking at titanium dioxide nanoparticles

Abstract

The recent advances in nanotechnology and its use in the field of agriculture are astonishingly increasing; therefore, it is important to understand their role in plant life. Four wheat cultivars soaked in different concentrations of TiO2-NPs (0.0%, 0.025 %, 0.05 %, 0.1 %, 0.2 % and 0.5 %) to select a concentration that stimulate cultivars growth under normal conditions during germination stage. Cultivar dependency appeared markedly in their response to TiO2-NPs. Generally, TiO2-NPs did not modify germination percentage, despite 0.1 % TiO2-NPs vastly enhanced seed potential by increasing vigor index, root dry matter stress tolerance index, shoot dry matter stress tolerance index, dry matter stress tolerance index, plant height stress tolerance index, root length stress tolerance index, fresh matter stress tolerance index and pigment composition. The surrounding concentrations exert little effect on the studied parameters and 0.5 % TiO2-NPs suppressed all indices.

Exogenous Nitric Oxide Improves the Protective Effects of TiO2 Nanoparticles on Growth, Antioxidant System, and Photosynthetic Performance of Wheat Seedlings Under Drought Stress

“…It has been shown that NO and TiO 2 NPs can improve photosynthetic pigments and gas exchange parameters by enhancing the activities of key enzymes involved in CO 2 fixation and chlorophyll synthesis such as RuBisCO activase (Baiazidi-Aghdam et al 2016;Mohammadi et al 2016). NO and TiO 2 NPs are also involved in promoting the light absorption of chloroplast and improving photosynthetic chain electron transport, photo-reduction in photosystem II, O 2 evolution, and photophosphorylation (Shafea et al 2017). Additionally, NO and TiO 2 NPs are reported to increase the uptake of some mineral nutrients such as Ca, Mg, K, and Fe which are involved in chlorophyll synthesis, gas exchanges, and photosynthesis in plants (Chen et al 2016).…”

“…Baiazidi-Aghdam et al (2016) demonstrated that TiO 2 NPs at appropriate concentrations decreased the accumulation of H 2 O 2 and MDA and stimulated chlorophyll formation in flaxseed (Linum usitatissimum) plants under water stress. TiO 2 NPs-induced enhancements in photosynthetic pigments and performance are reported in wheat plants (Shafea et al 2017). In a recent study, Tumburu et al (2015) showed that a series of genes, particularly those associated with photosynthesis were highly upregulated by the application of TiO 2 NPs.…”

Drought Stress Tolerance in Wheat and Barley: Advances in Physiology, Breeding and Genetics Research

“…Different concentrations of titanium dioxide nanoparticles (TiO 2 -NPs - 0, 0.025, 0.05, 0.1, 0.2, and 0.5%) were used to identify the concentration which stimulated the seeds germination percentage and other seedling traits of four wheat cultivars [143]. They found an increase in root length, shoots length, chlorophyll content and other seedling traits at the concentration of 0.1%, while, no improvement was found at a concentration of 0.5%.…”

Impact of synthesized metal oxide nanomaterials on seedlings production of three Solanaceae crops

“…Sufficient quantity of water and oxygen in imbibed onion, tomato and radish seeds might have accelerated the amylase and protease activities and produced soluble sugars and amino acids required for early seed germination and seedling growth (Laware and Raskar, 2014). Different concentrations of titanium dioxide nanoparticles (0, 0.025, 0.05, 0.1, 0.2, and 0.5%) were used to identify the concentration which stimulated the seeds germination percentage and seedling vigor of four wheat cultivars (Shafea et al, 2017). The similar positive impact of TiO 2 NPs on different plants has been also manifested (Jiang et al, 2017;Lyu et al, 2017;.…”