Title :
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
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;
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
DOI :
10.1109/IGARSS.1997.609078
