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Home Publications National Nursery Proceedings 1986 Comparison of Four Cold Hardiness Tests on Three Western Conifers

Comparison of Four Cold Hardiness Tests on Three Western Conifers

Container-grown ponderosa pine, Douglas-fir, and Engelmann spruce seedlings were cold acclimated and deacclimated in growth chambers over 19 weeks. A wholeplant freeze test and three tissue tests were performed weekly. The whole-plant freeze test provided results in 7 days and indicated differences in cold hardiness between stems, buds, and needles. Results from a freeze-induced electrolyte leakage test and differential thermal analysis were available in 2 days and 1 hour, respectively. Both tests were good predictors of tissue cold hardiness when calibrated against the whole-plant freeze test. Ethylene and ethane evolution were poor predictors of the development of cold hardiness.

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Author(s): Karen E. Burr, Richard W. Tinus, Stephen J. Wallner, Rudy M. King

Publication: National Nursery Proceedings - 1986

Event: Combined Western Forest Nursery Council and Intermountain Nursery Association Meeting
1986 - Tumwater, WA