Laser-induced imaging of blue/red and blue/far-red fluorescence ratios, F440/F690 and F440/F740, as a means of early stress detection in plants

Author

Lichtenthaler, H.K. ; Subhash, N. ; Wenzel, O. ; Miehé, J.A.

Author_Institution

Botanisches Inst., Karlsruhe Univ., Germany

Volume

4

fYear

1997

fDate

3-8 Aug 1997

Firstpage

1799

Abstract

Green plants exhibit a blue (F440), green (F520), red (F690) and far-red (F740) fluorescence emission. These laser-induced fluorescence (LIF) signatures and ratios allow an early stress diagnosis. The fluorescence ratios blue/red (F440/F690) and blue/far-red (F440/F735) proved to be very sensitive indicators of ongoing stress events. This has been demonstrated by fluorescence emission spectra and the new fluorescence imaging technique. High-light, water and temperature stress as well as nitrogen deficiency, herbicide application, or attacks by mites, etc., can easily be monitored via increasing or decreasing fluorescence ratios and images

Keywords

agriculture; forestry; geophysical techniques; optical radar; remote sensing by laser beam; 350 to 850 nm; F440; F690; F740; LIF; N deficiency; agriculture; blue far-red fluorescence ratio; blue red; color; fluorescence emission; forest; geophysical measurement technique; herbicide application; image colour; laser beam remote sensing; laser-induced fluorescence; laser-induced imaging; lidar; light stress; optical imaging; pest attack; plant; stress detection; stress diagnosis; temperature stress; vegetation mapping; water stress; Epidermis; Fluorescence; Geoscience; Laser excitation; Laser theory; Monitoring; Nitrogen; Pigments; Stress; Temperature sensors;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing, 1997. IGARSS '97. Remote Sensing - A Scientific Vision for Sustainable Development., 1997 IEEE International

Print_ISBN

0-7803-3836-7

Type

conf

DOI

10.1109/IGARSS.1997.609078

Filename

609078