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Home Publications National Nursery Proceedings 1990 State of the Art Seedling Stock Quality Tests Based on Seedling Physiology

State of the Art Seedling Stock Quality Tests Based on Seedling Physiology

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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Author(s): Christopher D.B. Hawkins, Wolfgang D. Binder

Publication: National Nursery Proceedings - 1990

Event: Combined Meeting of the Western Forest Nursery Associations
1990 - Roseburg, OR