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Proceedings of Past Forest Nursery Association Meetings:

State of the Art Seedling Stock Quality Tests Based on Seedling Physiology
Hawkins, C.D.B.; Binder, W.D.
1990: Roseburg, OR
This chapter describes the methodology and potential
application of two physiology-based seedling assessment
tests under development (variable chlorophyll fluores-
cence and stress-induced volatile emissions); the applica-
tion of two established seedling assessment tests which
are in limited operational use (mitotic index and elec-
trolyte leakage); and a short description of three other
physiological assessments (tri phenyl tetrazolium chloride,
days to bud break and the phytogram). The advantages
and liabilities of the individual physiology-based tests are
discussed.

An argument is presented for the use of an integrated bat-
tery of stock quality measures under varied environmental
conditions, so that probability based predictions of future
seedling performance can be generated. Finally, a variety
of seedling assessment technologies are rated individually
(sum and product) according to nine criteria. This proce-
dure reinforces the hypothesis that no one test will be
able to predict seedling stock quality or move forest
regeneration toward the target seedling concept.
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