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Metabolic alterations in leaves of oxalate-rich plant ${it Rumex obtusifolius}$ L. irradiated by $$gamma$$ rays

$$gamma$$線照射した高シュウ酸含有植物エゾノギシギシの葉における代謝変化

北野 沙也佳*; 宮城 敦子*; 大野 豊; 長谷 純宏; 鳴海 一成*; 山口 雅利*; 内宮 博文*; 川合 真紀*

Kitano, Sayaka*; Miyagi, Atsuko*; Ono, Yutaka; Hase, Yoshihiro; Narumi, Issey*; Yamaguchi, Masatoshi*; Uchimiya, Hirofumi*; Kawai, Maki*

We investigated on the metabolic effectiveness of $$gamma$$ ray irradiation to seeds of ${it Rumex obtusifolius}$, which are known to accumulate high level of soluble oxalate, to lower oxalate accumulation in leaves. Reduced rate of germination, discoloration of cotyledons, and deformed true leaves were observed by elevated irradiation. Metabolome analysis of primary metabolites using capillary electrophoresis-mass spectrometry showed a decrease in oxalate contents in the leaves of plants from $$gamma$$ ray-irradiated seeds. Moreover, organic acids such as malate and 2-oxoglutarate also decreased, whereas amino acids such as glutamate and glutamine increased. These results indicated that seed irradiation by $$gamma$$ rays leads to dynamic changes in metabolic pathways as well as plant growth/development.

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パーセンタイル:72.47

分野:Endocrinology & Metabolism

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