Effects of Nanoanatase TiO2 on Photosynthesis of Spinach Chloroplasts Under Different Light Illumination

Zheng, Lei; Su, Mingyu; Liu, Chao; Chen, Liang; Huang, Hao; Xiao, Wei; Liu, Xiaoqing; Yang, Fan; Gao, Fengqing; Hong, Fashui

doi:10.1007/s12011-007-0047-3

Cited by 176 publications

(70 citation statements)

References 12 publications

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“…TiO2-NPs protect the chloroplast from excessive light by augmenting the activity of antioxidant enzymes . Similarly, Lei et al (2007) as well as Monica and Cremonini (2009) found that TiO2-NPs increased photosynthesis and plant growth in spinach and enhanced absorption and transmission of solar energy to electron energy and chemical active energy. They also found that TiO2-NPs entered the chloroplast and was transferred in the photosynthetic electron transport chain to create NADP+, was reduced to NADPH, and coupled to photophosphorylation and transformed electron energy to ATP.…”

Section: Discussionmentioning

confidence: 88%

Wheat seedlings traits as affected by soaking at titanium dioxide nanoparticles

Shafea¹,

Zidan²

2017

Environ. Earth Ecol.

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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.

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Section: Discussionmentioning

confidence: 88%

Wheat seedlings traits as affected by soaking at titanium dioxide nanoparticles

Shafea¹,

Zidan²

2017

Environ. Earth Ecol.

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“…Addition of 0.25% nano-TiO 2 (rutile) stimulated oxygen evolution rate in spinach chloroplasts, improved chloroplast coupling and enhanced activities of Mg 2+ -ATPase and chloroplast coupling factor I CF 1 -ATPase on the thylakoid membranes [70] and nano-TiO 2 (rutile) protected chloroplasts from aging for long-time illumination [71]. Great increase of the electron transfer, oxygen evolution, and photophosphorylation was observed also in chloroplasts from nanoanatase-TiO 2 -treated spinach under visible light and ultraviolet light illumination [72]. Biomass accumulation of spinach (Spinacia oleracea) by TiO 2 NPs (by 60%) was also observed by Gao et al [73].…”

Section: Positive Effects Of Mnps On Plantsmentioning

confidence: 95%

Metal Nanoparticles and Plants / Nanocząstki Metaliczne I Rośliny

Masarovičová¹,

Kráľová²

2013

Ecological Chemistry and Engineering S

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Metal nanoparticles (MNPs) belong mostly to the engineered type of nanoparticles and have not only unique physical and chemical properties but also different biological actions. In recent years, noble MNPs and their nano-sized agglomerates (collectively referred to as nanoparticles or particles in the subsequent sections) have been the subjects of much focused research due to their unique electronic, optical, mechanical, magnetic and chemical properties that can be significantly different from those of bulk materials. To enhance their use, it is important to understand the generation, transport, deposition, and interaction of such particles. Synthesis of MNPs is based on chemical or physical synthetic procedures and by use of biological material ("green synthesis" as an environmentally benign process) including bacteria, algae and vascular plants (mainly metallophytes). In biological methods for preparation of metal nanoparticles mainly leaf reductants occurring in leaf extracts are used. MNPs can be formed also directly in living plants by reduction of the metal ions absorbed as a soluble salt, indicating that plants are a suitable vehicle for production of MNPs. These methods used for preparation of MNPs are aimed to control their size and shape. Moreover, physicochemical properties of MNPs determine their interaction with living organisms. In general, inside the cells nanoparticles might directly provoke either alterations of membranes and other cell structures or activity of protective mechanisms. Indirect effects of MNPs depend on their physical and chemical properties and may include physical restraints, solubilization of toxic nanoparticle compounds or production of reactive oxygen species. Toxic impacts of MNPs on plants is connected with chemical toxicity based on their chemical composition (eg release of toxic metal ions) and with stress or stimuli caused by the surface, size and shape of these nanoparticles. Positive effects of MNPs were observed on the following plant features: seed germination, growth of plant seedlings, stimulation of oxygen evolution rate in chloroplasts, protection of chloroplasts from aging for long-time illumination, increase of the electron transfer and photophosphorylation, biomass accumulation, activity of Rubisco, increase of quantum yield of photosystem II, root elongation, increase of chlorophyll as well as nucleic acid level and increase in the shoot/root ratio. However, it should be stressed that MNPs impact on human and environmental health remains still unclear.

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“…Lu et al (2002) showed the productive effect of mixture of SiO 2 and TiO 2 nanoparticles in G. max with increase in water and fertilizer uptake capacity and stimulation of nitrate reductase and antioxidant activity. Studies demonstrating the effect of nano-TiO 2 in promoting photosynthesis and growth in spinach have also been conducted in which an increase in photosynthetic processes under both visible and ultraviolet light has been reported due to the pivotal role of TiO 2 (Lei et al 2007). Zheng et al (2005) reported that TiO 2 nanoparticles have increased 73 % dry weight, threefold higher photosynthetic rate, and 45 % increment in chlorophyll a after seed treatment in spinach.…”

Section: Nano-fertilizers and Plant Growthmentioning

confidence: 99%

Nano-fertilizers and Their Smart Delivery System

Solanki¹,

Bhargava²,

Chhipa³

et al. 2015

Nanotechnologies in Food and Agriculture

274

126

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Outburst of world population in the past decade has forced the agricultural sector to increase crop productivity to satisfy the needs of billions of people especially in developing countries. Widespread existence of nutrient deficiency in soils has resulted in great economic loss for farmers and significant decreases in nutritional quality and overall quantity of grains for human beings and livestock. Use of large-scale application of chemical fertilizers to increase the crop productivity is not a suitable option for long run because the chemical fertilizers are considered as double-edged swords, which on the one hand increase the crop production but on the other hand disturb the soil mineral balance and decrease soil fertility. Large-scale application of chemical fertilizers results in an irreparable damage to the soil structure, mineral cycles, soil microbial flora, plants, and even more on the food chains across ecosystems leading to heritable mutations in future generations of consumers.In recent years, nanotechnology has extended its relevance in plant science and agriculture. Advancement in nanotechnology has improved ways for large-scale production of nanoparticles of physiologically important metals, which are now used to improve fertilizer formulations for increased uptake in plant cells and by minimizing nutrient loss. Nanoparticles have high surface area, sorption capacity, and controlled-release kinetics to targeted sites making them "smart delivery system." Nanostructured fertilizers can increase the nutrient use efficiency through mechanisms such as targeted delivery, slow or controlled release. They could precisely release their active ingredients in responding to environmental triggers and biological demands. In recent lab scale investigations, it has been reported that nano-fertilizers can improve crop productivity by enhancing the rate of seed germination, seedling growth, photosynthetic activity, nitrogen metabolism, and carbohydrate and protein synthesis. However, as being an infant technology, the ethical and safety issues surrounding the use of nanoparticles in plant productivity are limitless and must be very carefully evaluated before adapting the use of the so-called nano-fertilizers in agricultural fields.

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Effects of Nanoanatase TiO2 on Photosynthesis of Spinach Chloroplasts Under Different Light Illumination

Cited by 176 publications

References 12 publications

Wheat seedlings traits as affected by soaking at titanium dioxide nanoparticles

Wheat seedlings traits as affected by soaking at titanium dioxide nanoparticles

Metal Nanoparticles and Plants / Nanocząstki Metaliczne I Rośliny

Nano-fertilizers and Their Smart Delivery System

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