TY  - JOUR
AU  - Kolber, Z.
AU  - Klimov, D.
AU  - Ananayev, P. I.
AU  - Rascher, U.
AU  - Berry, J.
AU  - Osmond, B.
TI  - Measuring photosynthetic parameters at a distance: Laser induced fluorescence transient (LIFT) method for remote measurements of photosynthesis in terrestrial vegetation
JO  - Photosynthesis research
VL  - 84
SN  - 0166-8595
CY  - Dordrecht [u.a.]
PB  - Springer Science + Business Media B.V
M1  - PreJuSER-44169
PY  - 2005
N1  - Record converted from VDB: 12.11.2012
AB  - We have developed a laser induced fluorescence transient (LIFT) technique and instrumentation to remotely measure photosynthetic properties in terrestrial vegetation at a distance of up to 50 m. The LIFT method uses a 665 nm laser to project a collimated, 100 mm diameter excitation beam onto leaves of the targeted plant. Fluorescence emission at 690 nm is collected by a 250 mm reflective telescope and processed in real time to calculate the efficiency of photosynthetic light utilization, quantum efficiency of PS II, and the kinetics of photosynthetic electron transport. Operating with peak excitation power of 125 W m-2, and duty cycle of 10-50%, the instrument conforms to laser safety regulations. The LIFT instrument is controlled via an Internet connection, allowing it to operate from remote locations or platforms. Here we describe the theoretical basis of the LIFT methodology, and demonstrate its applications in remote measurements of photosynthetic properties in the canopy of cottonwood and oak trees, and in the rosette of Arabidopsis mutants.
KW  - Fluorescence
KW  - Lasers
KW  - Light
KW  - Photochemistry
KW  - Photosynthesis: physiology
KW  - Plant Leaves: metabolism
KW  - Populus: metabolism
KW  - Quercus: metabolism
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
C6  - pmid:16049764
UR  - <Go to ISI:>//WOS:000230845200019
DO  - DOI:10.1007/s11120-005-5092-1
UR  - https://juser.fz-juelich.de/record/44169
ER  -