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Active oxygen scavengers during cold acclimation of Scots pine seedlings in relation to freezing tolerance
Umeå University, Faculty of Science and Technology, Department of Plant Physiology. Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC).
Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC).
1998 (English)In: Cryobiology, ISSN 0011-2240, E-ISSN 1090-2392, Vol. 37, no 1, 38-45 p.Article in journal (Refereed) Published
Abstract [en]

Freezing injury of plants may be caused by the deleterious reactions of active oxygen species, and free-radical scavenging systems may be important in the alleviation of freezing stress. To test the feasibility of this hypothesis, enzymes and metabolites that cooperatively scavenge O-2(-) and H2O2 were analyzed in Scots pine (Pinus sylvestris L.) seedlings during a stepwise cold acclimation procedure. Elevated levels of enzymatic scavengers such as ascorbate peroxidase, glutathione reductase, monodehydroascorbate reductase, and dehy droascorbate reductase were found, along with increased freezing tolerance during cold acclimation, supporting the hypothesis. Induction of the scavenging systems during acclimation is discussed in relation to freezing tolerance. (C) 1998 Academic Press.

Place, publisher, year, edition, pages
1998. Vol. 37, no 1, 38-45 p.
Keyword [en]
active oxygen, freezing tolerance, low temperature, Pinus, scavenging systems
Identifiers
URN: urn:nbn:se:umu:diva-44778ISI: 000075366600005OAI: oai:DiVA.org:umu-44778DiVA: diva2:423070
Available from: 2011-06-14 Created: 2011-06-09 Last updated: 2017-12-11

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Oquist, Gunnar

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