Junglekeeper, I am not sure I will be much
Guttation used to be associated with the
hydathodes, not necessarily used along
with other external secretory structures
such as glandular trichomes and the
nectaries of which these can contain
sugars, salts and minerals.
Hydathodes, modified parts of leaves,
discharge water originating from the
interior of the leaf to the surface. The
exudation of water originating from the
xylem out through the leaves is called
When the same or similar water droplets
are also seen on the petioles and stems is
where I do not feel comfortable thinking
the term guttation applies to them also.
Below is a link that gives rise to a conflict
in that the hydathodes can have some salt
content in the discharge but I don't remember
them having sugar in them. The nectaries
involve the phloem as well as the xylem
and can transpire solutes, sometimes called
salt glands. Nectariferous glands can be
found on the petioles of a variety of plants.
You may want to contact this person and
ask if he feels guttation only involves the
hydathodes or can also involve trichomes.