Measuring protein in pine leaves and branches

[jenfedaque at samba.cnb.uam.es]

I'm posting this for a friend.


Is there any method to measure total protein contents in hard vegetal
tissues? I think a Lowry would work, but the point is how to homogenize
the material (pine leaves, little branches...)

Any reference will be welcome

Thanks

josefina at farmacia.ub.es