Journal
SMALL
Volume 15, Issue 43, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201902189
Keywords
abscisic acid; hormone delivery; implantable devices; organic bioelectronics; plants
Categories
Funding
- Knut and Alice Wallenberg Foundation
- Swedish Research Council (VR)
- Swedish Foundation for Strategic Research (SSF)
- Onnesjo Foundation
- VINNOVA
- Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University [2009-00971]
- European Union [800926]
- Marie Sklodowska Curie Individual Fellowship (MSCA-IFEF-ST, Trans-Plant) [702641]
- Marie Curie Actions (MSCA) [702641] Funding Source: Marie Curie Actions (MSCA)
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Electronic control of biological processes with bioelectronic devices holds promise for sophisticated regulation of physiology, for gaining fundamental understanding of biological systems, providing new therapeutic solutions, and digitally mediating adaptations of organisms to external factors. The organic electronic ion pump (OEIP) provides a unique means for electronically-controlled, flow-free delivery of ions, and biomolecules at cellular scale. Here, a miniaturized OEIP device based on glass capillary fibers (c-OEIP) is implanted in a biological organism. The capillary form factor at the sub-100 mu m scale of the device enables it to be implanted in soft tissue, while its hyperbranched polyelectrolyte channel and addressing protocol allows efficient delivery of a large aromatic molecule. In the first example of an implantable bioelectronic device in plants, the c-OEIP readily penetrates the leaf of an intact tobacco plant with no significant wound response (evaluated up to 24 h) and effectively delivers the hormone abscisic acid (ABA) into the leaf apoplast. OEIP-mediated delivery of ABA, the phytohormone that regulates plant's tolerance to stress, induces closure of stomata, the microscopic pores in leaf's epidermis that play a vital role in photosynthesis and transpiration. Efficient and localized ABA delivery reveals previously unreported kinetics of ABA-induced signal propagation.
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