Inactivation of Bacteria using Discharge Plasma under Liquid Fertilizer in a Hydroponic Culture System

Okumura, Takamasa; Saito, Yoshinori; Takano, Kyoya; Takahashi, Katsuyuki; Takaki, Koichi; Satta, Naoya; Fujio, Takuya

doi:10.1615/plasmamed.2016018683

Cited by 25 publications

(19 citation statements)

References 18 publications

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“…campestris placed on a roller plasma conveyer was decreased, showing significant degradation of lipopolysaccharides and oxidation of genomic DNA (Toyokawa et al, 2017). The pathogenicity and colony forming unit of Ralstonia solanacearum were significantly reduced after the discharge plasma treatment of a hydroponic solution (Okumura et al, 2016). Plasma processed air (PPA) is a novel concept that can be used in the food packaging industry to reduce the load of microbes on packaging material and fresh produce.…”

Section: Bacterial Pathogensmentioning

confidence: 99%

Plant Disease Control by Non-Thermal Atmospheric-Pressure Plasma

et al. 2020

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Disease stresses caused by pathogenic microorganisms are increasing, probably because of global warming. Conventional technologies for plant disease control have often revealed their limitations in efficiency, environmental safety, and economic costs. There is high demand for improvements in efficiency and safety. Non-thermal atmospheric-pressure plasma has demonstrated its potential as an alternative tool for efficient and environmentally safe control of plant pathogenic microorganisms in many studies, which are overviewed in this review. Efficient inactivation of phytopathogenic bacterial and fungal cells by various plasma sources under laboratory conditions has been frequently reported. In addition, plasma-treated water shows antimicrobial activity. Plasma and plasma-treated water exhibit a broad spectrum of efficiency in the decontamination and disinfection of plants, fruits, and seeds, indicating that the outcomes of plasma treatment can be significantly influenced by the microenvironments between plasma and plant tissues, such as the surface structures and properties, antioxidant systems, and surface chemistry of plants. More intense studies are required on the efficiency of decontamination and disinfection and underlying mechanisms. Recently, the induction of plant tolerance or resistance to pathogens by plasma (so-called "plasma vaccination") is emerging as a new area of study, with active research ongoing in this field.

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Section: Bacterial Pathogensmentioning

confidence: 99%

Plant Disease Control by Non-Thermal Atmospheric-Pressure Plasma

et al. 2020

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“…A new solution-sterilization device using discharged plasma was developed to sterilize the nutrient solution ( Fig. 12; Okumura et al, 2016;Saito et al, 2016Saito et al, , 2017Takahata et al, 2015;Takano et al, 2015). The whole hydroponic system can be constructed at low cost as only one liquid fertilizerincorporating machine is needed.…”

Section: Tomatoesmentioning

confidence: 99%

Protected Horticulture after the Great East Japan Earthquake in Iwate Prefecture

Ohta

Yasuba

2019

Hortic J

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Agricultural lands in the Kesen area, which is located in the coastal area of Iwate Prefecture, were severely damaged by the Great East Japan Earthquake on March 11, 2011. Empirical research was undertaken to promote agricultural restoration and reconstruction. This project was conducted to realize low-cost protected horticulture utilizing local resources effectively. In this area, where forestry was popular, there was abundant unnecessarily thinned timber. Three types of low-cost greenhouses were developed, including a wooden frame house built using lumber derived from thinning. A stove to use thinned timber as a fuel was also developed. To establish protected horticulture at a low cost, greenhouses that could be constructed with accessible materials were developed along with a device for sterilizing nutrient solutions using charged plasma. An environmental control program was developed based on a "ubiquitous environment control system (UECS)" for small-scale facilities. Disease control using hot water for long-term cultivation was carried out. Strawberry and tomato production was conducted to demonstrate the use of these developed elements and resulted in yields significantly higher than those obtained for these crops before the disaster.

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“…4 Photographs of the seedlings of experimental sections of control. Negative control; + positive control; and discharge plasma treatment on the initial, sixth, and 12th day 12 Fig. 9 Population of microorganisms bacteria, moulds and yeasts in the glass impinger after measurement under each ESD voltage condition.…”

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confidence: 99%