Visualizing and understanding the biodistribution of agricultural chemicals inside cells and living plants are very important for enhancing targeting and changing application approaches of chemicals. Here, a novel material was synthesized through covalent coupling of 2,4-dichlorophenoxyacetic acid to 4-mercaptophenol-coated gold nanoparticles (2,4-D-MP-Au NPs). Per Au nanoparticle (4.4 � 0.7 nm) was successfully modified 1197 2,4-D molecules, which was sufficient for bioapplications. The optical imaging of 2,4-D-MP-Au NPs inside BY-2 cells was directly examined by the two-photo microscopy, revealing that endocytosis as the internalization mechanism was energy dependent. Furthermore, the biodistribution of 2,4-D-MP-Au NPs in Ricinus cotyledons was observed by TEM. The utilization of the intrinsic physical properties of Au NPs will open up new possibilities in future labelling and optical imaging of agricultural chemicals in living plants.

Biological effects of 2,4-dichlorophenoxyacetic acid conjugated gold nanoparticles

248th National Meeting (2014)

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