gfp in arabadopsis

[M. Anderson]

I'm trying to detect gfp expression in tobacco leaves.  The flourescence 
under long wave uv is not very convincing.  The suposedly correct filters 
on the microscope are not very impressive either. Should I clear the 
leaves ?  I tried acetone which certainly cleared them but the background 
in the control was still very high.  I should see something, they are 
rooting nicely in selective medium which usually means most of them are 
transformed.  The promoter has been quite dependable before but only used 
with gus which is so easy to see. 
thanks for your trouble
Catherine DeLong