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Plant stress detection by remote measurement of fluorescence

J. C. McFarlane, R. D. Watson, A. F. Theisen, R. D. Jackson, W. L. Ehrler, P. J. Pinter, S. B. Idso, and R. J. Reginato

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Abstract

Chlorophyll fluorescence of mature lemon trees was measured with a Fraunhofer line discriminator (FLD). An increase in fluorescence was correlated with plant water stress as measured by stomatal resistance and twig water potential.

© 1980 Optical Society of America

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