Protective enzymatic systems against activated oxygen species compared in normal and vitrified shoots of Prunus avium L. L. raised in ... View Full Text


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Article Info

DATE

1995-05

AUTHORS

Th. Franck, Cl. Kevers, Th. Gaspar

ABSTRACT

Vitrification of shoots of Prunus avium L. L. was induced and expressed in a four week in vitro multiplication cycle simply by replacing agar by gelrite. The first vitrification symptoms were visible from the 7th day on. Enzymatic antioxidants were compared weekly in crude extract of normal (on agar) and vitrifying (on gelrite) shoots. The activity of superoxide dismutase was higher in vitrifying shoots. The other enzymes (gaîacol-peroxidase, catalase, ascorbate peroxidase, mono- and dehydro-ascorbate reductases, glutathione reductase) had lower activities. Increased superoxide dismutase activity might mean hydrogen peroxide accumulation and decreased activities of the other enzymes, deficiency in its detoxification. The question therefore is raised whether the hyperhydric morphological abnormalities result from the accumulation of toxic oxygen forms. Vitrification is often considered as a morphological response to several stresses. Contrary to most plants which adapt themselves to stresses by increasing all the above defence enzymes, in vitro shoots under vitrifying conditions appear unable to react in a similar manner. More... »

PAGES

253-256

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf00024782

DOI

http://dx.doi.org/10.1007/bf00024782

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1032975677


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