DNA yield from plant tissue.

[J. Pat Martinez]

What type of detergent did you use in your extraction?  If you used CTAB,
then that can account for the artificially high OD readings.

Pat M.


In article
<Pine.OSF.3.91.961204145039.4932A-100000 at eduserv.its.unimelb.EDU.AU>,
Michael Adamson <s_mka1 at eduserv.its.unimelb.EDU.AU> wrote:

> Does anyone know the theoretical upper limit for genomic DNA/mg in
> expanding eucalyptus leaf tissue?  I'm a bit worried that my 2ug/mg yield
> from leaf discs is suspiciously high.  Even commercial kits advertise only
> a 0.3-0.8ug/mg DNA yield.  The pellets are also a pink-purple colour, but
> 260/280 is always 1.8-1.9. Could RNA be the culprit (though there's only a
> fairly faint smear at the bottom of my gels)?  I don't use RNase, but I
> would have thought that not using RNA-grade reagents or equipment should
> have resulted in much of it degrading - especially considering the 40min
> incubation in non-sterilised lysis buffer. 
> 
> Any ideas greatly appreciated!