Abstract
The chlorophyll fluorescence vitality indices of green leaves (the Rfd-values) were comparatively determined from the same leaf samples using 1) a self-constructed, red laser equipped, portable field chlorophyll fluorometer (Rfd-values in the 690 and 730 nm region) and 2) the PAM-fluorometer (Rfd-values in the 730 nm region). The results indicate that the PAM-fluorometer, originally built for the measurement of Q- and E-quenching, can also be applied to determine the Rfd-values (in the 730 nm region) using its continuous white saturating light source for fluorescence induction. Since Rfd-values as a vitality index contain additional and complementary physiological information on the whole process of photosynthesis, it is strongly recommended to measure in all leaf samples — in addition to Q- and E-quenching — also the Rfd-values. Though the PAM-fluorometer can be successful used for the determination of Rfd-values, the portable field fluorometer has the advantage that it also permits calculation of the stress adaptation index Ap from the two Rfd-values at 690 and 730 nm.
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© 1988 Kluwer Academic Publishers
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Haitz, M., Lichtenthaler, H.K. (1988). The Measurement of Rfd-Values as Plant Vitality Indices with the Portable Field Chlorophyll Fluorometer and the Pam-Fluorometer. In: Lichtenthaler, H.K. (eds) Applications of Chlorophyll Fluorescence in Photosynthesis Research, Stress Physiology, Hydrobiology and Remote Sensing. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-2823-7_31
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DOI: https://doi.org/10.1007/978-94-009-2823-7_31
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-7771-2
Online ISBN: 978-94-009-2823-7
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