I have to perform a pot experiment in which I have to separately visualize and collect root of different, intercropped herbaceous species and I need a stain to be injected in the above ground part and that can be transferred to the roots. This stain should allow me to discriminate roots from the stain-injected species from roots of the non injected species.
Can you suggest me some stain and, if available, examples of its application?
Thanks in advance.