期刊
ACTA PHYSIOLOGIAE PLANTARUM
卷 25, 期 4, 页码 337-343出版社
POLISH ACAD SCIENCES DEPT PLANT PHYSIOLOGY
DOI: 10.1007/s11738-003-0014-3
关键词
antioxidants; barley; catalase; guaiacol peroxidase; polyamines; water stress
Barley (Hordeum vulgare) seedlings were treated with spermidine prior to water deficit treatment to determine whether this polyamine is able to influence the activity of catalase (EC 1.11.1.6) and guaiacol peroxidase (EC 1.11.1.7). The content of endogenous polyamines was determined as well. This stress caused a visible increase of catalase activity and a much higher increase of guaiacol peroxidase activity. Treatment with exogenous spermidine induced a significant decrease in the activity of the both enzymes, whereas the polyamine level was enhanced, suggesting that polyamines are able to influence the activity of hydrogen peroxide scavenging enzymes and to moderate in that way this signal molecule level.
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