ISSN:
1573-5079
Keywords:
Chlorophyll fluorescence
;
Norway spruce (Picea abies (L.) Karst.)
;
winter stress
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Prompt chlorophyll a fluorescence kinetics at room temperature were measured from intact spruce needles. The fluorescence signal was recorded after varying light pretreatments. During the winter, induction curves showed characteristic changes in both the initial peak of fluorescence FV/FP (FP-FO/FP) and the steady state level Fdr (FP-FT/FP). Winter stress induced decreases in both values which showed close correlation to the light and temperature pre-history of the plants. In February changes in fluorescence induction indicative of a restoration of photosynthesis were detected and these corresponded to a rise of temperature above zero in combination with low light levels. In March increasing light intensity combined with chilling temperatures induced again decreases of both values of chlorophyll fluorescence induction suggesting the occurrence of photoinhibition.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00034833
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