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      Glutathione and ascorbic acid protect Arabidopsis plants against detrimental effects of iron deficiency.

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          Abstract

          Iron is an essential micronutrient required for a wide variety of cellular functions in plant growth and development. Chlorosis is the first visible symptom in iron-deficient plants. Glutathione (GSH) and ascorbic acid (ASC) are multifunctional metabolites playing important roles in redox balancing. In this work, it was shown that GSH and ASC treatment prevented chlorosis and the accumulation of reactive oxygen species induced by iron deficiency in Arabidopsis leaves. In iron deficiency, GSH and ASC increased the activity of the heme protein ascorbate peroxidase at a similar level to that found in iron-sufficient seedlings. GSH was also able to preserve the levels of the iron-sulfur protein ferredoxin 2. GSH content decreased 25% in iron-deficient Arabidopsis seedlings, whereas the ASC levels were not affected. Taken together, these results showed that GSH and ASC supplementation protects Arabidopsis seedlings from iron deficiency, preserving cell redox homeostasis and improving internal iron availability.

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          Author and article information

          Journal
          J Exp Bot
          Journal of experimental botany
          Oxford University Press (OUP)
          1460-2431
          0022-0957
          Aug 2013
          : 64
          : 11
          Affiliations
          [1 ] Instituto de Investigaciones Biológicas, UE-CONICET-UNMdP, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, Funes 3250, CC 1245, 7600, Mar del Plata, Argentina.
          Article
          ert153
          10.1093/jxb/ert153
          23788722
          ea6d27d9-7573-40b2-9540-b92e723db0b9
          History

          Arabidopsis thaliana,ascorbic acid,chlorosis,glutathione,iron deficiency,reactive oxygen species.

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