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Gibberellic acid-induced changes in glutathione metabolism and anthocyanin content in plant tissue
KTH, Superseded Departments, Biochemistry and Biotechnology.
KTH, Superseded Departments, Biochemistry and Biotechnology.
2001 (English)In: Plant Cell Tissue and Organ Culture, ISSN 0167-6857, E-ISSN 1573-5044, Vol. 64, no 1, 77-80 p.Article in journal (Refereed) Published
Abstract [en]

Literature data point to a possible link between gibberellic acid (GA(3)) and glutathione metabolism in plant tissue, as both are connected to dormancy breakage. In order to study the influence of GA(3) on glutathione metabolism, we treated an anthocyanin accumulating cell culture of periwinkle (Catharanthus roseus) and a shoot differentiated culture of pea (Pisum sativum) with GA(3). Glutathione reductase (GR; E.C. activity increased to 135% and 190% of the control in C. roseus and P. sativum, respectively. The level of oxidized glutathione (GSSG) decreased to 60% of the control in the C. resells culture while no change in GSSG was observed in the P. sativum culture. No changes in the tissue concentration of total glutathione was observed in the cultures after GA(3) treatment. Concomitant. to the changes in GSSG and GR, an increase in anthocyanin accumulation was observed in the C. roseus culture in association with a strong increase in phenylalanine ammonia-lyase (PAL; E.C. activity in response to GA(3). These data strongly suggest a link between GA(3) and glutathione metabolism.

Place, publisher, year, edition, pages
2001. Vol. 64, no 1, 77-80 p.
Keyword [en]
anthocyanins, gibberellins, glutathione reductase, oxidized glutathione, phenylalanine ammonia-lyase, reductase, cultures, stress, pea
URN: urn:nbn:se:kth:diva-20583ISI: 000168429200013OAI: diva2:339279
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

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Ohlsson, Anna B.Berglund, Torkel
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