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Laser-induced fluorescence of green plants. III - LIF spectral signatures of five major plant typesA technique amenable to remote sensing use which utilizes laser-induced fluorescence (LIF) properties of plants has been successfully used in the laboratory to identify five major plant types. These included herbaceous dicots, herbaceous monocots, conifers, hardwoods, and algae. Each of these plant types exhibited a characteristic LIF spectra when excited by a pulsed N2 laser emitting at 337 nm. Although monocots and dicots possess common fluorescence maxima at 440, 685, and 740 nm, they could be differentiated from one another by using the ratio of the square of the fluorescence intensity at 440 nm to the nonsquared intensity at 685 nm, i.e., (440)-squared/685. In all cases, monocots yielded a significantly higher ratio. Conifers have fluorescence maxima at 440, 525, and 740 nm but none at 685 nm. Hardwoods exhibited fluorescence at 440, 525, 685, and 740 nm. Algae had very low fluorescence at 440 nm, no fluorescence at 525 nm, and fluorescence maxima at 685 and 740 nm. For algae, the ratio of the fluorescence intensity at 685 nm to that at 740 nm was much greater than that for monocots, dicots, and hardwoods. The potential use of the LIF technique for individual species identification is suggested.
Document ID
19850036487
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Chappelle, E. W.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Wood, F. M., Jr.
(NASA Goddard Space Flight Center Earth Resources Branch, Greenbelt, MD, United States)
Newcomb, W. W.
(RMS Technologies, Inc. Landover, MD, United States)
Mcmurtrey, J. E., III
(U.S. Department of Agriculture, Field Crops Laboratory, Beltsville MD, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1985
Publication Information
Publication: Applied Optics
Volume: 24
ISSN: 0003-6935
Subject Category
Earth Resources And Remote Sensing
Accession Number
85A18638
Distribution Limits
Public
Copyright
Other

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