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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 52, Iss. 13 — May. 1, 2013
  • pp: 3004–3011

Changes in chlorophyll a fluorescence of glyphosate-tolerant soybean plants induced by glyphosate: in vivo analysis by laser-induced fluorescence spectroscopy

Joelson Fernandes, William Ferreira Falco, Samuel Leite Oliveira, and Anderson Rodrigues Lima Caires  »View Author Affiliations


Applied Optics, Vol. 52, Issue 13, pp. 3004-3011 (2013)
http://dx.doi.org/10.1364/AO.52.003004


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Abstract

A significant increase in the use of the herbicide glyphosate has generated many questions about its residual accumulation in the environment and possible damage to crops. In this study, changes in chlorophyll a (chl-a) fluorescence induced by glyphosate in three varieties of glyphosate-resistant soybean plants were determined with an in vivo analysis based on a portable laser-induced fluorescence system. Strong suppression of chl-a fluorescence was observed for all plants treated with the herbicide. Moreover, the ratio of the emission bands in the red and far-red regions (685nm/735nm) indicates that the application of glyphosate led to chlorophyll degradation. The results also indicated that the use of glyphosate, even at concentrations recommended by the manufacturer, suppressed chl-a fluorescence. In summary, this study shows that fluorescence spectroscopy can detect, in vivo, very early changes in the photosynthetic status of transgenic soybeans treated with this herbicide.

© 2013 Optical Society of America

OCIS Codes
(170.6280) Medical optics and biotechnology : Spectroscopy, fluorescence and luminescence
(300.2530) Spectroscopy : Fluorescence, laser-induced
(280.1415) Remote sensing and sensors : Biological sensing and sensors

ToC Category:
Spectroscopy

History
Original Manuscript: November 9, 2012
Revised Manuscript: April 1, 2013
Manuscript Accepted: April 1, 2013
Published: April 24, 2013

Virtual Issues
Vol. 8, Iss. 6 Virtual Journal for Biomedical Optics

Citation
Joelson Fernandes, William Ferreira Falco, Samuel Leite Oliveira, and Anderson Rodrigues Lima Caires, "Changes in chlorophyll a fluorescence of glyphosate-tolerant soybean plants induced by glyphosate: in vivo analysis by laser-induced fluorescence spectroscopy," Appl. Opt. 52, 3004-3011 (2013)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-52-13-3004

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