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| Title: | Promotion of flowering in the Pinaceae by hormones -- a reality |
|---|---|
| Author(s): | Pharis, Richard P. |
| Date: | 1977 |
| Source: | In: Proceedings of the Thirteenth Lake States Forest Tree Improvement Conference; Gen. Tech. Rep. NC-50. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Forest Experiment Station. 1-10 |
| Station ID: | -NC-050 |
| Description: | The effectiveness of gibberellins as promotors of flowering in Cupressaceae and Taxodiaceae is historically reviewed, emphasizing that these groups of plants respond to polar gibberellins and produce sexual structures after exogenous application of GA3. Species in Pinaceae, on the other hand, can be brought into flowering with non-polar gibberellin treatments. Admixtures of gibberellins applied with auxin and stimulatory cultural treatments such as strangulation, nitrate fertilization, root pruning, or drought stress are particularly successful. Each species, age, even each clone and each site may require highly "specific" treatments in forms of dosage level, frequency of application, hormone mixture, and adjunct cultural treatment. |
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