Aluminum-Induced Lipid Peroxidation and Lignin Deposition Are Associated with an Increase in H_2O_2 Generation in Wheat Seedlings (Plant Nutrition)

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概要

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• Wheat (Triticum aestivum cv. Kalyansona) seedlings were exposed to 0, 10, 50, and 100μM Al in a 250μM CaCl_2 solution for 24h at pH 4.5. Root elongation decreased gradually, while the Al content markedly increased with increasing supply of Al in the solution. The generation of H_2O_2 during Al stress was investigated biochemically and histochemically, as well as other events related to the decomposition of H_2O_2. After 24h treatment, root elongation inhibition was detected at all the concentrations of Al. The level of lipid peroxidation at 10μM Al after 24h treatment was similar to that of the control, while a significant increase in lipid peroxidation was detected at 50 and 100μM Al. H_2O_2 generation was higher at 50 and 100μM Al than that at 10μM Al. These results suggest that Al-inducible lipid peroxidation may require excessive yield of H_2O_2. Time course experiment with 10μM Al indicated that there is a strongly positive correlation between root elongation inhibition and cellular H_2O_2 yield. There were no significant changes in the activities of catalase (CAT) and ascorbate peroxidase (APX) in roots at 10μM Al after 24h treatment. However, a significant decrease in the activities of CAT and APX and a large increase in the activities of oxalate oxidase (OXO), guaiacol peroxidase (GPX), and coniferyl alcohol peroxidase (CA-POX) as well as lignin deposition were observed at 100μM Al. These results suggest the possible involvement of OXO in the production of a large amount of H_2O_2 under severe Al stress, whereas GPX and CA-POX may be involved in the degradation of H_2O_2, leading to lignin deposition.

• 社団法人日本土壌肥料学会の論文

著者

• Hossain M

  Laboratory Of Plant Cell Technology Science Of Biological Resources The United Graduate School Of Ag

• Hossain A

  Laboratory Of Plant Cell Technology Science Of Biological Resources The United Graduate School Of Ag

• Hossain A.k.m.

  Laboratory Of Plant Cell Technology Science Of Biological Resources The United Graduate School Of Ag

• Hossain A.

  Gifu University

• HOSSAIN M.

  Laboratory of Animal Biotechnology, Faculty of Agriculture, Shinshu University

• KOYAMA Hiroyuki

  Laboratory of Plant Cell Technology, Faculty of Applied Biological Sciences, Gifu University

• Kihara Tomonori

  Laboratory of Plant Cell Technology, Department of Biotechnology, The United Graduate School of Agri

• Hara Tetsuo

  Laboratory of Plant Cell Technology, Department of Biotechnology, The United Graduate School of Agri

• Hossain A.

  Laboratory of Plant Cell Technology, Department of Biotechnology, Science of Biological Resources, T

• Kihara Tomonori

  Forestry Research Institute Oji Paper

• Hara T

  Laboratory Of Plant Cell Technology Science Of Biological Resources The United Graduate School Of Ag

• Hara Tetsuo

  Laboratory Of Plant Cell Technology Department Of Biotechnology Faculty Of Agriculture Gifu Universi

• Koyama H

  Laboratory Of Plant Cell Technology Faculty Of Applied Biological Sciences Gifu University

• Koyama Hiroyuki

  Laboratory Of Plant Cell Technology Faculty Of Applied Biological Sciences Gifu University

• Koyama Hiroyuki

  Laboratory Of Plant Cell Technology Department Of Biotechnology Faculty Of Agriculture Gifu Universi

• Hossain M.

  Laboratory Of Animal Biotechnology Faculty Of Agriculture Shinshu University

• Koyama Hiroyuki

  Laboratory Of Animal Physiology And Functional Anatomy Graduate School Of Agriculture Kyoto University

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