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The five peaks of X-ray diffraction were assigned to the diffraction {1 1 1}, {2 0 0}, {2 2 0}, {3 1 1} and {2 2 2} planes of face-centered cubic silver respectively in all the cases

Plant system: Nature's nanofactory

Colloids and Surfaces B: Biointerfaces, no. 2 (2009): 219-223

Cited: 287|Views24
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Abstract

Three categories of plants growing under three different extreme conditions were taken for assaying their promises to undertake nano-transformation. It was found that all of them successfully synthesize silver nanoparticles. The synthesis was performed akin to room temperature. X-ray and transmission electron microscopy analyses were perf...More

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Introduction
  • Chemical constitution and metabolic promises decide the phylogenetic and functional fate of an organism in nature.
  • Plants as autotrophs have this edge over others in terms of their morphological organization, molecular distribution, interaction of metabolites during metabolic fluxes which probably bestows them with nature’s blessing of adaptability against different environmental rigors ranging from deep ocean beds through deserts to extremely cold alpine regions
  • It is their chemical constitutions which provides them strength to withstand such environmentally diverse habitats.
  • Synthesis of nanoparticles can be achieved through several methods such as extensive ball milling, condensation or precipitation, drawing glassy materials, self-assembly including biological fabrication, forming materials around/within templates, growth
Highlights
  • Chemical constitution and metabolic promises decide the phylogenetic and functional fate of an organism in nature
  • Synthesis of nanoparticles can be achieved through several methods such as extensive ball milling, condensation or precipitation, drawing glassy materials, self-assembly including biological fabrication, forming materials around/within templates, growth
  • The X-ray diffraction (XRD) confirms the crystalline nature of the particles
  • The five peaks of XRD were assigned to the diffraction {1 1 1}, {2 0 0}, {2 2 0}, {3 1 1} and {2 2 2} planes of face-centered cubic (FCC) silver respectively in all the cases
  • The unit cell edge was respectively estimated to be 4.062 Å, 4.065 Å and 4.067 Å for Bryophyllum, Cyperus and Hydrilla plant extracts negotiated Ag NPs with the space group of Fm3m which is in agreement with the literature report (PCPDF No #03-0931)
  • Matate dehydrogenase catalyzes the reduction of oxalo acetic acid (OAA) by NADH and the resulting malic acid is stored into the vacuole
Methods
  • Plant samples were placed in a 250 ml beaker containing 200 ml 50% Et-OH and were placed on boiling steam bath for 15–20 min till colour of the solvent changes.
  • They were cooled at room temperature, gently pressed and filtered firstly through sterile serene cloth and through Whatman filter paper.
  • These solutions were treated as source extracts and were utilized in subsequent procedures
Results
  • The unit cell edge was respectively estimated to be 4.062 Å, 4.065 Å and 4.067 Å for Bryophyllum, Cyperus and Hydrilla plant extracts negotiated Ag NPs with the space group of Fm3m which is in agreement with the literature report (PCPDF No #03-0931).
  • The sizes of particles are found to be in the range of 2–5 nm
Conclusion
  • Plants harbour enumerable treasure of metabolites of both primary and secondary types.
  • Matate dehydrogenase catalyzes the reduction of OAA by NADH and the resulting malic acid is stored into the vacuole.
  • Malic acid passes from the vacuole back into the cytosol and undergoes oxidative decarboxylation producing pyruvate under the influence of NAD+/NADP+ dependent malic enzyme.
  • The synthesis of Ag NPs might have resulted due to different metabolites or metabolic fluxes and other oxido-reductively labile metabolites like ascorbates or catechol/protocatacheuic acid
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