Electronic Resource
Oxford, UK
:
Blackwell Publishing Ltd
Physiologia plantarum
90 (1994), S. 0
ISSN:
1399-3054
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Biology
Notes:
Catalase IEC 1.11.1.6) activity in Norway spruce (Picea abies [L.] Karst.) needles was examined under different environmental conditions. When shade-adapted spruce trees were exposed to full sunlight or to high light intensities in growth chambers, the catalase activity decreased. Under continuous light the activity was reduced in comparison to the control grown in light/dark cycles. The reduction of the activity was not temperature dependent. Under field conditions the activity was higher in hranches oriented north than in those oriented south. A diurnal rhythm with a maximum in the night was delected. The reduction in catalase activity also occurred in young white needles of Picea ahies vur. argenteospica. which are free of chlorophyll. It is concluded that in Norway spruce needles there is a ligh:-dependent photoinactivation of catalase. which is not temperature-dependent.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1399-3054.1994.tb08820.x
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