Abstract
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.
Highlights
Gene expression analysis of Arabidopsis thaliana seed irradiated with plasmas has been performed to elucidate the growth enhancement mechanism [7,8,9]
Plasma irradiation was performed on Arabidopsis thaliana seeds and leaves to investigate the mechanism of plant growth enhancement and clarify the effect of plasma irradiation during the growth process
Gene expression analysis was performed on the leaves grown from the seeds irradiated with plasma and the leaves irradiated with plasma after germination
Summary
Restriction effects of plant growth have been observed under some plasma conditions [6] To utilize these effects on plants and increase the production of agricultural products, detailed clarification of the response mechanism of plants against plasma irradiation is necessary. These growth enhancement effects would be owing to ions and active particles generated in plasmas. Gene expression analysis of Arabidopsis thaliana seed irradiated with plasmas has been performed to elucidate the growth enhancement mechanism [7,8,9]. Observed gene expressions indicate that genes of the plant growth, stress response, hormone response, photosynthesis are upregulated From these results, an increase of the energy production pathways would occur after germination.
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