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Delivery, Fate, and Mobility of Silver Nanoparticles in Citrus Trees.

Publication ,  Journal Article
Su, Y; Ashworth, VETM; Geitner, NK; Wiesner, MR; Ginnan, N; Rolshausen, P; Roper, C; Jassby, D
Published in: ACS nano
March 2020

Crop disease control is crucial for the sustainable development of agriculture, with recent advances in nanotechnology offering a promising solution to this pressing problem. However, the efficacy of nanoparticle (NP) delivery methods has not been fully explored, and knowledge regarding the fate and mobility of NPs within trees is still largely unknown. In this study, we evaluate the efficiency of NP delivery methods and investigate the mobility and distribution of NPs with different surface coatings (citrate (Ct), polyvinylpyrrolidone (PVP), and gum Arabic (GA)) within Mexican lime citrus trees. In contrast to the limited delivery efficiency reported for foliar and root delivery methods, petiole feeding and trunk injection are able to deliver a large amount of NPs into trees, although petiole feeding takes much longer time than trunk injection (7 days vs 2 h in citrus trees). Once NPs enter plants, steric repulsive interactions between NPs and conducting tube surfaces are predicted to facilitate NP transport throughout the plant. Compared to PVP and Ct, GA is highly effective in inhibiting the aggregation of NPs in synthetic sap and enhancing the mobility of NPs in trees. Over a 7 day experimental period, the majority of the Ag recovered from trees (10 mL, 10 ppm GA-AgNP suspension) remain throughout the trunk (81.0% on average), with a considerable amount in the roots (11.7% on average), some in branches (4.4% on average), and a limited amount in leaves (2.9% on average). Furthermore, NP concentrations during injection and tree incubation time postinjection are found to impact the distribution of Ag in tree. We also present evidence for a transport pathway that allows NPs to move from the xylem to the phloem, which disperses the NPs throughout the plant architecture, including to the roots.

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Published In

ACS nano

DOI

EISSN

1936-086X

ISSN

1936-0851

Publication Date

March 2020

Volume

14

Issue

3

Start / End Page

2966 / 2981

Related Subject Headings

  • Silver
  • Nanoscience & Nanotechnology
  • Metal Nanoparticles
  • Citrus
 

Citation

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Su, Y., Ashworth, V. E. T. M., Geitner, N. K., Wiesner, M. R., Ginnan, N., Rolshausen, P., … Jassby, D. (2020). Delivery, Fate, and Mobility of Silver Nanoparticles in Citrus Trees. ACS Nano, 14(3), 2966–2981. https://doi.org/10.1021/acsnano.9b07733
Su, Yiming, Vanessa E. T. M. Ashworth, Nicholas K. Geitner, Mark R. Wiesner, Nichole Ginnan, Philippe Rolshausen, Caroline Roper, and David Jassby. “Delivery, Fate, and Mobility of Silver Nanoparticles in Citrus Trees.ACS Nano 14, no. 3 (March 2020): 2966–81. https://doi.org/10.1021/acsnano.9b07733.
Su Y, Ashworth VETM, Geitner NK, Wiesner MR, Ginnan N, Rolshausen P, et al. Delivery, Fate, and Mobility of Silver Nanoparticles in Citrus Trees. ACS nano. 2020 Mar;14(3):2966–81.
Su, Yiming, et al. “Delivery, Fate, and Mobility of Silver Nanoparticles in Citrus Trees.ACS Nano, vol. 14, no. 3, Mar. 2020, pp. 2966–81. Epmc, doi:10.1021/acsnano.9b07733.
Su Y, Ashworth VETM, Geitner NK, Wiesner MR, Ginnan N, Rolshausen P, Roper C, Jassby D. Delivery, Fate, and Mobility of Silver Nanoparticles in Citrus Trees. ACS nano. 2020 Mar;14(3):2966–2981.
Journal cover image

Published In

ACS nano

DOI

EISSN

1936-086X

ISSN

1936-0851

Publication Date

March 2020

Volume

14

Issue

3

Start / End Page

2966 / 2981

Related Subject Headings

  • Silver
  • Nanoscience & Nanotechnology
  • Metal Nanoparticles
  • Citrus