Investigation of nanotoxicological effects of nanostructured hydroxyapatite to microalgae Pseudokirchneriella subcapitata

Pereira, Flávia Fontes; Paris, E. C.; Bresolin, Joana Dias; Foschini, Milene Mitsuyuki; Ferreira, Marcos D.; Corrêa, Daniel S.

doi:10.1016/j.ecoenv.2017.06.008

Cited by 19 publications

(6 citation statements)

References 37 publications

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“…Compared to superphosphates, the typical compounds of choice for phosphate fertilizers, which are typified by high solubility and frequent induction of eutrophication in plants, HAp has been considered a better choice by nature. 66 This sparse solubility argument is similar to the one applicable in bone regeneration, where overly soluble bone grafts, such as calcium sulfate or dicalcium phosphate, cause void formation and drainage issues upon implantation and are less preferred than their more stable biodegradable analogues of inorganic or polymeric origin. However, the effect of sparsely soluble HAp on the flowers was as pronounced as that of more soluble ACP, indicating that particle, not ionic, effects are responsible for inducing the senescence retardation and that the solubility argument cannot be the sole explanatory principle in this case.…”

Section: Discussionmentioning

confidence: 95%

“…We have also inferred that the concentration of CPs must be carefully optimized with respect to their phase composition and crystallinity to induce a desired effect on the flower longevity. Compared to superphosphates, the typical compounds of choice for phosphate fertilizers, which are typified by high solubility and frequent induction of eutrophication in plants, HAp has been considered a better choice by nature . This sparse solubility argument is similar to the one applicable in bone regeneration, where overly soluble bone grafts, such as calcium sulfate or dicalcium phosphate, cause void formation and drainage issues upon implantation and are less preferred than their more stable biodegradable analogues of inorganic or polymeric origin.…”

Section: Discussionmentioning

confidence: 99%

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Calcium Phosphate and Senescence of Orange Jubilees in the Summertime

Uskoković¹,

Uskoković²,

Wu³

et al. 2020

ACS Appl. Bio Mater.

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Biological kingdoms conceal innumerous undiscovered in vivo models for assessing the biomedical potential of nanoparticles. Here, we report on a floral in vivo model that tests for biocompatibility, bioactivity, antimicrobial potency, and biological barrier penetrability of nanoparticles. The model makes use of the plucked flowers of Tecoma alata, a.k.a. Orange Jubilee, from the Bignoniaceae trumpet vine family. Two types of calcium phosphate (CP) nanoparticles, hydroxyapatite (HAp) and amorphous CP (ACP), were dispersed in deionized vase water, and their effects on the flower senescence were measured. The corolla margin diameter, the corolla tilting degree, and live vs. dead ratio were the parameters that defined the senescence metrics. Both HAp and ACP delayed the senescence of T. alata flowers in a concentration-dependent manner and in inverse proportionality with the pH. The effect was primarily attributed to the bacteriostatic activity of the nanoparticles against Gram-negative microorganisms whose growth blocks the xylem and prevents the water uptake, but also to the adsorption of flower degradation products that serve as bacterial food and signal the programmed cell death. The possibility that CP nanoparticles get deposited along the xylem lumen and take on the calcium-regulating role analogous to that of intracellular calcium oxalate crystals was discussed, too. Both HAp and ACP nanoparticles were uptaken by the flowers and primarily deposited in the calyxes, with the transport of HAp, but not ACP, to the petals being considerable, coinciding with the greater effect of HAp on the longevity at lower concentrations and reiterating that the effect is particulate and not ionic in nature. The observed effects were confirmed on another Tecoma species, Tecoma stans, a.k.a. Yellow Trumpetbush. Simple, economic, and high-throughput models enabling high statistical confidence levels, such as the floral in vivo model proposed here, can be valuable alternatives to their complex, expensive, and statistically challenging animal model analogues.

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Section: Discussionmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 99%

Calcium Phosphate and Senescence of Orange Jubilees in the Summertime

Uskoković¹,

Uskoković²,

Wu³

et al. 2020

ACS Appl. Bio Mater.

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“…There are studies showing the prospects for the use of natural minerals in nanostructured form, which can make a significant contribution to improving the efficiency of agricultural production [4]. Its use as a fertilizer can potentially contribute to an increase in food production, as high availability of mineral nanoparticles will allow controlling the concentration of fertilizers in a perfect range [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Effect of zeolites on soil modification and productivity

et al. 2020

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Local natural zeolite-containing rocks use efficiency in agriculture of the Republic of Tatarstan was studied in the research. The research was conducted in the field on leached black soil applying mechanoactivated zeolites and in greenhouses on grey forest soil using nanostructured zeolite. Field experiments identified the soil deacidification of 0.4 pHsol, increase of assimilable phosphates of the 1st and 2nd groups (Ca-P1 и Ca-P2) – of 5.0 and 6.6 mg per 100 g of soil. Moreover, the research considered the increasing the mobile phosphorus available to plants – of 8.0 and 10.0 mg/kg and exchange potassium of 5.0 and 6.6 mg/kg according to the doses of zeolite of 10 and 15 t/ha. Improving the activity of microflora in rhizosphere and growth acceleration of microbial biomass to 15.5 mg per 100 g*h were observed. The average annual grain yield gain was 0.3 and 0.5 t/ha, and the payback of 1 ton of zeolite by additional harvest 0.11 and 0.09 t/ha in grain units respectively. Improvement in the reaction of the soil environment was stated in the vegetative conditions on gray forest soil using nanostructured zeolite in doses of 0.1 and 1.0 t/ha, a positive shift in pHsol, was 0.97 and 0.9 units respectively. Under the influence of mechanically activated celite at a dose of 15 t/ha, soil acidity decreased by 0.99 pHsol units. The use of nanostructured zeolite contributed to an increase of the reserves of ammonia nitrogen in the soil – by 0.8 and 2.4 mg/kg, mobile phosphorus – by 6.0 and 33.0 mg/kg, and exchangeable potassium – by 3.0 and 5.5 mg/kg respectively at doses of 0.1 and 1.0 t/ha respectively. The growth of microbial biomass was up to 24.0 mg/100 g*h. Additional grain gains were obtained: under the influence of mechanically activated zeolite at a dose of 15 t/ha – 8.6 g/vessel and nanostructured analog at a dose of 0.1 t/ha – 7.3 g/vessel, which were comparable at the consumption of the latter 150 times less.

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“…Chart 1 shows the effects of some elements in different cultures. There are three main approaches to the production of nanofertilizers: top-down, bottomup, and biological (PEREIRA et al, 2017). Each synthesis method has advantages and disadvantages in terms of the required process, ranging from the control of particle size, economic viability, even in the necessary yield for a given crop.…”

Section: Introductionmentioning

confidence: 99%

Nanofertilizers: An Overview

Júnior¹,

Mulinari²,

Oliveira³

et al. 2020

Ciência, Tecnologia E Inovação: Do Campo À Mesa

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The adequate bioavailability of nutrients to plants is among the various difficulties of the agricultural sector. Thus, the existence of mechanisms for controlled release of the nutrients is essential for planting, as well as novel techniques that do not cause adverse effects. The use of nanotechnology in agriculture can bring many benefits, such as better use of nutrients by plants, reducing waste. Nanofertilizers are an emerging technology and a constantly expanding class of agrochemicals, representing possible solutions to the development of sustainable agriculture. Based on this, the present work aims to update and discuss some relevant topics about these nanomaterials, such as different synthesis approaches, possible mechanisms for the capture of nanofertilizers by plants, and the advantages and limitations of using these materials. Also, an overview of the main literature in the area is presented approaching current studies that use green chemistry concepts.

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Investigation of nanotoxicological effects of nanostructured hydroxyapatite to microalgae Pseudokirchneriella subcapitata

Cited by 19 publications

References 37 publications

Calcium Phosphate and Senescence of Orange Jubilees in the Summertime

Calcium Phosphate and Senescence of Orange Jubilees in the Summertime

Effect of zeolites on soil modification and productivity

Nanofertilizers: An Overview

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