Was improvement of spinach growth by nano-TiO2 treatment related to the changes of Rubisco activase?

Gao, Fengqing; Liu, Chao; Qu, Chunxiang; Zheng, Lei; Yang, Fan; Su, Mingyu; Hong, Fashui

doi:10.1007/s10534-007-9110-y

Cited by 196 publications

(85 citation statements)

References 24 publications

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“…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]. The activity of Rubisco in the nano-anatase-treated spinach was significantly higher than the control, by up to 2.33 times, and bulk TiO 2 treatment had no such significant effects.…”

Section: Positive Effects Of Mnps On Plantssupporting

confidence: 65%

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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Section: Positive Effects Of Mnps On Plantssupporting

confidence: 65%

Metal Nanoparticles and Plants / Nanocząstki Metaliczne I Rośliny

Masarovičová¹,

Kráľová²

2013

Ecological Chemistry and Engineering S

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“…However, it could also be a side effect of the dissolution of the smaller NPs that would make then occur faster than the larger, non-coated NPs. The dissolution of NPs has been observed in other NPs-plant systems [7].…”

Section: Forms Of Ni In Plant Tissuesmentioning

confidence: 92%

“…29,2010had little-to-no effect and, in some cases, have shown a positive effect on root and shoot elongation. In contrast, TiO 2 and ZnO NPs have been shown to have both negative and positive effects on the growth of plants, which were determined to be concentration dependent [6][7][8]29]. Thus, it is not surprising that the Ni(OH) 2 NPs were observed within mesquite plants.…”

Section: Toxicity and Biotransformation Of Nickel Nanoparticlesmentioning

confidence: 99%

Toxicity and biotransformation of uncoated and coated nickel hydroxide nanoparticles on mesquite plants

Parsons

López

González

et al. 2010

Enviro Toxic and Chemistry

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Nanomaterials are of particular interest in environmental chemistry due to their unknown toxicity to living organisms. Reports indicate that nanoparticles (NPs) affect seed germination, but the uptake and biotransformation of metal nanoparticles is not well understood. The present study investigated the toxicity and biotransformation of Ni(OH)2 NPs by mesquite plants (Prosopis sp.). Three sets of plants were treated for four weeks with 0.01, 0.05, or 0.10 g of either uncoated or sodium citrate coated NPs before and after synthesis. Nickel concentrations in plants were determined by inductively coupled plasma-optical emission spectroscopy (ICP-OES) and the form and oxidation state of Ni was determined using X-ray absorption spectroscopy (XAS). Results showed that uncoated NPs had an average size of 8.7 nm, whereas coated NPs before and after synthesis had an average of 2.5 and 0.9 nm, respectively. The ICP-OES results showed that plants treated with 0.10 g of uncoated and coated NPs before and after synthesis had 803, 764, and 400 mg Ni kg dry weight, in the leaves, respectively. The XAS analyses showed Ni NPs in roots and shoots of plants treated with uncoated NPs, whereas leaves showed a Ni(II)-organic acid type complex. However, plants treated with coated NPs before or after synthesis showed Ni NPs only in roots and a Ni(II)-organic acid complex in shoots and leaves. Results also showed that none of the treatments reduced plant size or chlorophyll production. To the authors' knowledge, this is the first time that the biotransformation of nanoparticles by a plant system is reported.

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“…Our data suggest that chlorophyll may be associated with growth, but that other factors could also be important. One of the explanations for this observation is that TiO 2 NPs probably enhanced rate of light independent reactions of photosynthesis, since these NPs can significantly promote Rubisco activase activity and its mRNA expression (Ma et al, 2008;Gao et al, 2008). Rubisco activase plays an important role in the regulation of photosynthesis and overexpression of this enzyme increased CO 2 assimilation (Yamori et al, 2012).…”

Section: Foliar Application Of Tio 2 Nps Under Normal Irrigationmentioning

confidence: 99%

Effects of TiO2 nanoparticles and water-deficit stress on morpho-physiological characteristics of dragonhead (Dracocephalum moldavica L.) plants

Mohammadi

Esmailpour

Gheranpaye

2016

AAS

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Water-deficit stress is the most important environmental factors limiting plant growth, and production. Nano-titanium dioxide (nano anataseTiO 2 ) can have various profound effects on the crop physiological, biochemical and morphological characteristics. In the present research, the influences of different concentrations ofTiO 2 nanoparticles (NPs) (0, 10 and 40 ppm) and water-deficit stress on Dragonhead (Dracocephalum moldavica L.) were investigated in a factorial experiment based on randomized complete block design with three replications. Results showed that under normal irrigation, foliar application of 10 ppm TiO 2 NPs increased plant shoot dry mass and essential oils content. Under water-deficit stress condition, plants treated with 10 ppm TiO 2 NPs had more proline and much less H 2 O 2 and malondialdehyde content as compared to untreated plants. Therefore, it can be concluded that proper concentration of TiO 2 NPs probably can be used as an exogenous stimuli for improvement of shoot growth and essential oil content in plants. Furthermore, water-deficit stress-induced damages such as oxidative stress and membrane damage can be ameliorated by foliar application of TiO 2 NPs at appropriate concentrations. Sušni stres je eden izmed najpomembnejših okoljskih dejavnikov, ki omejujejo rast in produktivnost rastlin. Uporaba nano delcev titanovega dioksida (TiO 2 nano anataza) ima lahko velike učinke na fiziološke, biokemične in morfološke lastnosti gojenih rastlin. V tej raziskavi je bil v naključnem faktorskem bločnem poskusu preučevan vpliv različnih koncentracij nano delcev TiO 2 (0, 10 in 40 ppm) in sušnega stresa na moldavsko kačjeglavko (Dracocephalum moldavica L.) v treh ponovitvah. Rezultati so pokazali, da sta se suha masa in vsebnost eteričnih olj povečali pri normalnem namakanju in listnem dodajanju 10 ppm TiO 2 nano delcev. V razmerah sušnega stresa so vsebovale rastline, ki so bile tretirane z 10 ppm TiO 2 več prolina in mnogo manj H 2 O 2 in malonildialdehida v primerjavi z netretiranimi rastlinami. Na osnovi tega bi lahko zaključili, da bi z uporabo primerne koncentracije nano delcev TiO 2 kot zunanjega stimulanta, lahko izboljšali rast poganjkov in vsebnost eteričnih olj pri tej rastlini. Poškodbe kot sta oksidativni stres in poškodovanost membran, ki nastanejo zaradi sušnega stresa, bi lahko ublažili s foliarno aplikacijo primerne koncentracije nanodelcev TiO 2 .

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Was improvement of spinach growth by nano-TiO2 treatment related to the changes of Rubisco activase?

Cited by 196 publications

References 24 publications

Metal Nanoparticles and Plants / Nanocząstki Metaliczne I Rośliny

Metal Nanoparticles and Plants / Nanocząstki Metaliczne I Rośliny

Toxicity and biotransformation of uncoated and coated nickel hydroxide nanoparticles on mesquite plants

Effects of TiO2 nanoparticles and water-deficit stress on morpho-physiological characteristics of dragonhead (Dracocephalum moldavica L.) plants

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