Visualization Plasma Diagnosis Indicator Using Discoloration Reaction of Au and Pt Ions

Satahira, Kosei; Ohshiro, Seisaku; Nakamura, Keiko; Ito, Seisiro; Ihara, Tatsuhiko

doi:10.2494/photopolymer.28.435

Cited by 3 publications

(2 citation statements)

References 4 publications

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“…The ozone CT value [ppm-min] was defined as the product of the ozone concentration, C, and the contact time, T with ozone [21,22]. Chemical indicators (CIs) were used to measure the amount of active oxygen produced by plasmas both at low pressure and atmospheric pressure which were almost proportional to CT values [23,24].…”

Section: Experimental Apparatus and Methodsmentioning

confidence: 99%

Persistence of Growth Enhancement Induced by Oxygen Plasma Irradiation Seed and Leaf

2023

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The variation of gene expression of seeds or leaves of Arabidopsis thaliana was investigated by irradiation with oxygen and air plasmas. The irradiation with oxygen plasma reported on the growth promotion and induced the consequence of gene expression in plant cells by neutral active oxygen species. The increase in leaf area ratio by oxygen plasma to seeds was due to epigenetics such as activation of DNA demethylation transcription factors and the growth enhancement effect induced by the plasma irradiation of seeds was inherited by next-generation cells through cell division even after germination. In oxygen irradiation for 10 s, expression of each de-DNA methylation-related gene increased, and DNA methylation-related genes decreased in expression. DNA acetylation that induces gene expressions was suppressed. However, irradiated for 20 s by oxygen, both demethylation suppression and promotion and methylation/acetylation suppression and promotion were obtained. On the other hand, methylation and demethylation may occur at the same time but were not significant and the acetylation was suppressed by air plasma irradiation. In both cases, active oxygen species was the key factor for the variation of gene expression.

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Section: Experimental Apparatus and Methodsmentioning

confidence: 99%

Persistence of Growth Enhancement Induced by Oxygen Plasma Irradiation Seed and Leaf

2023

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“…The ozone CT value was calculated in consideration of the fact that the ozone concentration in the chamber changes gradually with time until it is saturated, and in each case, the plasma irradiation parameters for the plants were determined so that the ozone CT value was constant. The production amount of active oxygen that is almost proportional to the CT value is measured using a chemical indicator (CI) in both cases of the low pressure and atmospheric pressure plasmas [23,24]. When active oxygen species irradiate the CI that is phthalocyanine dye pasted on a thin strip, the color of the CI changes due to oxidation of phthalocyanine.…”

Section: Experimental Apparatus and Methodsmentioning

confidence: 99%

Variations in Plant Growth Characteristics Due to Oxygen Plasma Irradiation on Leaf and Seed

Hayashi

Yamamoto

2022

Agronomy

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Gene expression variations of plant leaf are investigated by irradiating seed and leaf with oxygen or air plasmas. Enhancement of leaf growth is induced by oxygen plasma irradiation on seeds, which is supported by increased gene expression for protein synthesis, oxidative-reduction reactions, and decreased gene expression concerning DNA methylation and histone modification. Suppression of leaf growth is observed by the oxygen plasma, which would be owing to increased gene expression concerning heat shock protein and redox reaction, and decreased expression of photosynthesis and glycoprotein. Moreover, gene expression variation due to air plasma irradiation is almost the same as that of oxygen plasma. Active oxygen species are major factors in both oxygen and air plasmas for the variation of gene expressions in plants.

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Variations in Plant Growth Characteristics due to Oxygen Plasma Irradiation on Leaf and Seed

Hayashi¹,

Yamamoto²

2021

Preprint

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Gene expression variations of plant leaf are investigated by irradiating seed and leaf with oxygen or air plasmas. Enhancement of leaf growth is induced by oxygen plasma irradiation on seeds, which is supported by increased gene expression for protein synthesis, oxidative-reduction reactions and decreased gene expression concerning DNA methylation and histone modification. Suppression of leaf growth is observed by the oxygen plasma, which would be owing to increased gene expression concerning heat shock protein and redox reaction, and decreased expression of photosynthesis and glycoprotein. Also, gene expression variation due to air plasma irradiation is almost same as that of oxygen plasma. Active oxygen species are major factors in both oxygen and air plasmas for the variation of gene expressions in plant.

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Visualization Plasma Diagnosis Indicator Using Discoloration Reaction of Au and Pt Ions

Cited by 3 publications

References 4 publications

Persistence of Growth Enhancement Induced by Oxygen Plasma Irradiation Seed and Leaf

Persistence of Growth Enhancement Induced by Oxygen Plasma Irradiation Seed and Leaf

Variations in Plant Growth Characteristics Due to Oxygen Plasma Irradiation on Leaf and Seed

Variations in Plant Growth Characteristics due to Oxygen Plasma Irradiation on Leaf and Seed

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