NDLI: Glutathione metabolism and antioxidant responses during Eleutherococcus senticosus somatic embryo development in a bioreactor

Content Provider	Springer Nature Link
Author	Shohael, A. M. Ali, M. B. Hahn, E. J. Paek, K. Y.
Copyright Year	2007
Abstract	Compared to non-embryogenic callus, proembryonic mass, globular, and heart-shaped embryos of Eleutherococcus senticosus had higher levels of endogenous reduced glutathione (GSH). GSH content declined during the course of the embryo development (torpedo and cotyledon). Similarly, glutathione reductase that is involved in the recycling of GSH providing a constant intracellular level of GSH was also higher in globular and heart-shaped embryos. The transient increase in GSH contents also correlated with the changes in measured γ-glutamylcysteine synthetase activity over the same period. The endogenous levels of oxidized glutathione showed similar trend during development of the somatic embryos, whereas it declined in maturing somatic embryos. A pronounced increase in glutathione-S-transferase, glutathione peroxidase, catalase, and guaiacol peroxidase activity was observed during somatic embryo maturation. Ascorbate-glutathione cycle enzymes (ascorbate peroxidase; dehydroascorbate reductase and monodehydroascorbate reductase) activities also induced indicated that antioxidant enzymes played an important role during embryo development. These results suggested that the coordinated up-regulations of the antioxidant enzymes and glutathione redox system provide protection during somatic embryo development in E. senticosus. Antioxidant responses through alterations of the glutathione redox systems, have been described in the present studies have a significant role in somatic embryo development.
Starting Page	121
Ending Page	129
Page Count	9
File Format	PDF
ISSN	01676857
Journal	Plant Cell, Tissue and Organ Culture (PCTOC)
Volume Number	89
Issue Number	2-3
e-ISSN	15735044
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2007-06-13
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Bioreactor Eleutherococcus senticosus Enzymes γ-glutamylcysteine synthetase Glutathione Somatic embryogenesis Plant Physiology Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Horticulture

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