Submerged leaves of live indoor foliage plants adsorb H1N1 influenza virus from suspension

ABSTRACT

Control of hazardous indoor particles using plants has attracted interest due to the increasing worldwide air pollution and spread of pandemic-causing viruses. However, the interaction between human pathogenic viruses (HPVs) and live plants has not been examined largely due to issues in detecting tiny amounts of infectious viruses in a carrier (such as an aerosol) and the lack of suitable examination methods. In this study, as a novel evaluation method, the effect of submerged leaves of live plants on HPVs in water was examined, using the H1N1 influenza virus as a model. Selected plant foliage of a live plant was immersed in a small bag containing HPV water suspension. In an initial screening test, the activities of 20 different plant species on the virus suspension were evaluated using a rapid virus detection kit. Ten plant species had the capability to decrease virus concentrations in the water suspension within 72 h. Among the experimental plant species, Epipremnum aureum showed the highest virus decreasing characteristics when examined using both the kit and quantitative real time polymerase chain reaction. The capacity of immersed leaf of live E. aureum to decrease viral content was enhanced when the plant-containing pot was electrically grounded to the earth (approximately 70% decrease in virus concentration). The foliage sample analysis showed that virus adsorption to the plant foliage surface could be the major reason for the decrease in the suspension. These results suggest that the proposed method can be applied to select plants to further investigate plant–HPV interactions.

KEYWORDS:

• Epipremnum aureum
• influenza virus
• plant-virus interaction
• electrical grounding
• rapid influenza diagnostic test kit
• PFU

Acknowledgments

The authors thank Seong-Won Bang and Byung-Hoon Park (Garden4u Co.) for providing valuable experimental suggestions.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Supplementary material

Supplemental data for this article can be accessed online at https://doi.org/10.1080/15592324.2022.2163869.

Additional information

Funding

This study was supported by the Korea Forest Service as an R&D Program for Forest Science Technology (Project No. 2022431B10-2224-0802) and the Rural Development Administration as a Cooperative Research Program for Agriculture Science & Technology Development (Project No. PJ016185022022).