NDLI: Seasonal variation of maximum photochemical efficiency in boreal Norway spruce stands

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Seasonal variation of maximum photochemical efficiency in boreal Norway spruce stands

Content Provider	Springer Nature Link
Author	Lundmark, T. Bergh, Johan Strand, Martin Koppel, Andres
Copyright Year	1998
Abstract	The seasonal variation in maximum photochemical efficiency of photosystem II (Fv/Fm) and the relationship between Fv/Fm and climatic factors such as irradiance, frost-nights and daily mean temperature was studied in young Norway spruce trees for 4 years in northern Sweden. As a result of night frost, the Fv/Fm-ratio gradually decreased during the autumn. There was between-year variation in the pattern of Fv/Fm in fully exposed shoots during autumn and spring, largely as an effect of differing temperature conditions. During spring, there was a strong apparent relationship between daily mean temperature and Fv/Fm within the temperature range –3 to 12°C. The light regime to which the needles were exposed during winter affected Fv/Fm, and moderately shaded shoots from the bottom of the canopy generally had a higher Fv/Fm-ratio than fully exposed shoots from the top of the canopy.
Starting Page	63
Ending Page	67
Page Count	5
File Format	PDF
ISSN	09311890
Journal	Trees
Volume Number	13
Issue Number	2
e-ISSN	14322285
Language	English
Publisher	Springer-Verlag
Publisher Date	1998-11-27
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Ecology Physiology Plant Science Forestry

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