Journal
PHOTOSYNTHESIS RESEARCH
Volume 96, Issue 2, Pages 173-179Publisher
SPRINGER
DOI: 10.1007/s11120-008-9292-3
Keywords
chlorophyll fluorescence; diurnal acclimation; Scots pine; seasonal acclimation
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We present and evaluate the performance of a new field monitoring PAM fluorometer (MONI-PAM) which is intended for short- and long-term monitoring of the acclimation of photosystem II (PSII). The instrument measures chlorophyll fluorescence, photosynthetic photon flux density (PPFD), and temperature in the field, and monitors exactly the same leaf area over prolonged periods of time, facilitating the estimation of both rapidly reversible and sustained non-photochemical quenching (NPQ). The MONI-PAM performance is evaluated in the lab and under natural conditions in a Scots pine canopy during spring recovery of photosynthesis. The instrument provides a new tool to study in detail the acclimation of PSII to the environment under natural field conditions.
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