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Arabidopsis fluorescence

Marc van Iersel mvanier at GAES.GRIFFIN.PEACHNET.EDU
Fri Jun 7 09:29:39 EST 1996

At 05:49 AM 6/7/96 -0700, you wrote:
>Dear netters--
>I have been conducting some experiments with Arabidopsis and viewing the
>callus tissue under a fluorescing microscope.  I am wondering if any one
>can inform me what compound fluoresces yellow (cellulose ?) and which
>fluoresces light green at 490 nm. I also have deep red but am sure that is
>chlorophyll. The yellow occurs in older tissue and the light green in new
>cells.  The callus is grown in light and is a light yellowish green in
>color under ambient light.  The fluorescence occurs without adding any
>chemicals such as fluorescein diacetate.
>					|
>Charles S. Buer                         |E-mail:  buer at wpi.wpi.edu
>Biology/Biotechnology Dept.             |Phone:   (508) 831-5052
>Worcester Polytechnic Institute         |FAX:     (508) 831-5936
>100 Institute Rd.                       |http://www.wpi.edu/~buer
>Worcester, MA 01609                     |
>					|

Several tissues can fluoresce yellow when excited with 490 nm light.  These
include the cuticle, sclerenchyma, fibers, xylem vessels, and gossypol
glands.  Lignin is believed to be the compound responsible for the
fluorescence in some of these tissues.  For more information see Grignon et
al, 1989 (Amer. J. Bot. 76:871-877) and Van Iersel et al, 1995 (J. Exp. Bot.

I don't know what the light green fluorescence would be.  You may want to
contact Drs. McCully and/or Canny at the Department of Biology, Carleton
University, Ottawa, Ontario, Canada.  They have done a lot of fluorescence
work and may be able to help you.  Good luck.

Marc van Iersel			E-mail: mvanier at gaes.griffin.peachnet.edu
Assistant Professor		
Department of Horticulture	Tel: (770) 412-4766
University of Georgia		Fax: (770) 412-4764
Georgia Station
Griffin, GA 30223-1797

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