Star Polymer Size, Charge Content, and Hydrophobicity Affect their Leaf Uptake and Translocation in Plants

Determination of how the properties of nanocarriers of agrochemicals affect their uptake and translocation in plants would enable more efficient agent delivery. Here, we synthesized star polymer nanocarriers poly­(acrylic acid)-block-poly­(2-(methylsulfinyl)­ethyl acrylate) (PAA-b-PMSEA) and poly­(a...

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Bibliographic Details
Published in:Environmental science & technology 2021-08, Vol.55 (15), p.10758-10768
Main Authors: Zhang, Yilin, Fu, Liye, Li, Sipei, Yan, Jiajun, Sun, Mingkang, Giraldo, Juan Pablo, Matyjaszewski, Krzysztof, Tilton, Robert D, Lowry, Gregory V
Format: Article
Language:English
Subjects:
Acrylic acid
Acrylics
Agrochemicals
Aquatic plants
Environmental impact
Foliar applications
Hydrophobicity
Leaves
Organs
Plants
Polyacrylic acid
Polymers
Roots
Solanum lycopersicum
Stress concentration
Sustainable Systems
Tomatoes
Translocation
Unloading
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Summary:Determination of how the properties of nanocarriers of agrochemicals affect their uptake and translocation in plants would enable more efficient agent delivery. Here, we synthesized star polymer nanocarriers poly­(acrylic acid)-block-poly­(2-(methylsulfinyl)­ethyl acrylate) (PAA-b-PMSEA) and poly­(acrylic acid)-block-poly­((2-(methylsulfinyl)­ethyl acrylate)-co-(2-(methylthio)­ethyl acrylate)) (PAA-b-P­(MSEA-co-MTEA)) with well-controlled sizes (from 6 to 35 nm), negative charge content (from 17% to 83% PAA), and hydrophobicity and quantified their leaf uptake, phloem loading, and distribution in tomato (Solanum lycopersicum) plants 3 days after foliar application of 20 μL of a 1g L–1 star polymer solution. In spite of their property differences, ∼30% of the applied star polymers translocated to other plant organs, higher than uptake of conventional foliar applied agrochemicals (
ISSN:0013-936X
1520-5851
DOI:10.1021/acs.est.1c01065