skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Nanoparticle Size and Coating Chemistry Control Foliar Uptake Pathways, Translocation, and Leaf-to-Rhizosphere Transport in Wheat

Abstract

Nano enabled foliar-applied agrochemicals can potentially be safer and more efficient than conventional products. However,limited understanding about how nanoparticle properties influence their interactions with plant leaves, uptake, translocation through the mesophyll to the vasculature, and transport to the rest of the plant prevents rational design. This study used a combination of Auquantification and spatial analysis to investigate how size (3, 10, or50 nm) and coating chemistry (PVP versus citrate) of gold nano-particles (AuNPs) influence these processes. Following wheat foliar exposure to AuNPs suspensions (~280 ng per plant), adhesion on the leaf surface was increased for smaller sizes, and PVP-AuNPs compared to citrate-AuNPs. After 2 weeks, there was incomplete uptake of citrate-AuNPs with some AuNPs remaining on the outside of the cuticle layer. However, the fraction of citrate-AuNPs that had entered the leaf was translocated efficiently tothe plant vasculature. In contrast, for similar sizes, virtually all of the PVP-AuNPs crossed the cuticle layer after 2 weeks,but its transport through the mesophyll cells was lower. As a consequence of PVP-AuNP accumulation in the leaf mesophyll, wheat photosynthesis was impaired. Regardless of their coating and sizes, the majority of the transported AuNPs accumulated in younger shoots (10-30%) and in roots (10-25%), and 5-15%more » of the NPs <50 nm were exuded into the rhizosphere soil. A greater fraction of larger sizes AuNPs (presenting lowerζpotentials) was transported to the roots. The key hypotheses about the NPs physical-chemical and plant physiology parameters that may matter to predict leaf-to-rhizosphere transport are also discussed.« less

Authors:
ORCiD logo [1];  [1];  [1]; ORCiD logo [1]; ORCiD logo [2];  [3];  [2];  [4]; ORCiD logo [1]; ORCiD logo [1]
  1. Carnegie Mellon Univ., Pittsburgh, PA (United States)
  2. Univ. of Kentucky, Lexington, KY (United States)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
  4. Univ. of South Australia, Adelaide, SA (Australia)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1668643
Report Number(s):
BNL-219867-2020-JAAM
Journal ID: ISSN 1936-0851
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
ACS Nano
Additional Journal Information:
Journal Volume: 13; Journal Issue: 5; Journal ID: ISSN 1936-0851
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 59 BASIC BIOLOGICAL SCIENCES

Citation Formats

Avellan, Astrid, Yun, Jie, Zhang, Yilin, Spielman-Sun, Eleanor, Unrine, Jason M., Thieme, Juergen, Li, Jieran, Lombi, Enzo, Bland, Garret, and Lowry, Gregory V. Nanoparticle Size and Coating Chemistry Control Foliar Uptake Pathways, Translocation, and Leaf-to-Rhizosphere Transport in Wheat. United States: N. p., 2019. Web. doi:10.1021/acsnano.8b09781.
Avellan, Astrid, Yun, Jie, Zhang, Yilin, Spielman-Sun, Eleanor, Unrine, Jason M., Thieme, Juergen, Li, Jieran, Lombi, Enzo, Bland, Garret, & Lowry, Gregory V. Nanoparticle Size and Coating Chemistry Control Foliar Uptake Pathways, Translocation, and Leaf-to-Rhizosphere Transport in Wheat. United States. doi:10.1021/acsnano.8b09781.
Avellan, Astrid, Yun, Jie, Zhang, Yilin, Spielman-Sun, Eleanor, Unrine, Jason M., Thieme, Juergen, Li, Jieran, Lombi, Enzo, Bland, Garret, and Lowry, Gregory V. Fri . "Nanoparticle Size and Coating Chemistry Control Foliar Uptake Pathways, Translocation, and Leaf-to-Rhizosphere Transport in Wheat". United States. doi:10.1021/acsnano.8b09781. https://www.osti.gov/servlets/purl/1668643.
@article{osti_1668643,
title = {Nanoparticle Size and Coating Chemistry Control Foliar Uptake Pathways, Translocation, and Leaf-to-Rhizosphere Transport in Wheat},
author = {Avellan, Astrid and Yun, Jie and Zhang, Yilin and Spielman-Sun, Eleanor and Unrine, Jason M. and Thieme, Juergen and Li, Jieran and Lombi, Enzo and Bland, Garret and Lowry, Gregory V.},
abstractNote = {Nano enabled foliar-applied agrochemicals can potentially be safer and more efficient than conventional products. However,limited understanding about how nanoparticle properties influence their interactions with plant leaves, uptake, translocation through the mesophyll to the vasculature, and transport to the rest of the plant prevents rational design. This study used a combination of Auquantification and spatial analysis to investigate how size (3, 10, or50 nm) and coating chemistry (PVP versus citrate) of gold nano-particles (AuNPs) influence these processes. Following wheat foliar exposure to AuNPs suspensions (~280 ng per plant), adhesion on the leaf surface was increased for smaller sizes, and PVP-AuNPs compared to citrate-AuNPs. After 2 weeks, there was incomplete uptake of citrate-AuNPs with some AuNPs remaining on the outside of the cuticle layer. However, the fraction of citrate-AuNPs that had entered the leaf was translocated efficiently tothe plant vasculature. In contrast, for similar sizes, virtually all of the PVP-AuNPs crossed the cuticle layer after 2 weeks,but its transport through the mesophyll cells was lower. As a consequence of PVP-AuNP accumulation in the leaf mesophyll, wheat photosynthesis was impaired. Regardless of their coating and sizes, the majority of the transported AuNPs accumulated in younger shoots (10-30%) and in roots (10-25%), and 5-15% of the NPs <50 nm were exuded into the rhizosphere soil. A greater fraction of larger sizes AuNPs (presenting lowerζpotentials) was transported to the roots. The key hypotheses about the NPs physical-chemical and plant physiology parameters that may matter to predict leaf-to-rhizosphere transport are also discussed.},
doi = {10.1021/acsnano.8b09781},
journal = {ACS Nano},
number = 5,
volume = 13,
place = {United States},
year = {2019},
month = {5}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Save / Share: