Plant husbandry – Process
Patent
1978-05-30
1980-04-29
Eickholt, E. H.
Plant husbandry
Process
47DIG1, A01H 100
Patent
active
041998979
ABSTRACT:
This invention is a method for inducing early flowering in juvenile phase softwood tree species, particularly those within the genus Pinus. This is accomplished by reducing temperature and photoperiod conditions, during a time in which growth would otherwise be active, so that the tree falls into a quiescent or resting phase short of full dormancy. Early bud set occurs, yet active bud development continues. The resting phase is maintained for a sufficient time for sexual buds to differentiate and form. The plant is then allowed to resume normal growth and flowering. By this method both male and female flowers have been produced in grafted loblolly pine scions as young as three years from seed. Normally little or no flowering occurs in this species until trees are from 15 to 18 years old.
REFERENCES:
Greenwood, Michael S. 1977 "Flower Stimulation Techniques for `Loblolly` Pine" in Proceedings Third World Consultation on Forest Tree Breeding Canberra, pp. 1-10. _
Jackson, D. I. and G. B. Sweet 1971 "Flower Initiation in Temperate Woody Plants" Horticultural Abstracts, 42, pp. 9-24. _
Jackson, D. I. and G. B. Sweet (Undated) "Flower Determination in Temperate Woody Plants" New Zealand Forest Service, Reprint No. 508, pp. 1-59. _
Romberger, J. A. and R. A. Gregory 1974 "Analytical Morphogenesis and Physiology of Flowering in Trees" in Proceedings Third North American Forest Biology Workshop, Colorado State University, Fort Collins, pp. 132-147. _
Sachs, R. M. 1977 "Nutrient Diversion: An Hypothesis to Explain the Chemical Control of Flowering" Horticultural Science 12, No. 3, pp. 220-222. _
Zimmerman, Richard H. 1972 "Juvenility and Flowering in Woody Plants: A Review" Hortscience, 7 No. 5, pp. 447-455. _
Zimmerman, Richard H. 1973 "Juvenility and Flowering of Fruit Trees" ACTA Horticulturae, 34, pp. 139-142. _
Downs, R. J. et al. (1958) "Effects of Photoperiod and Kind of Supplemental Light on Vegetative Growth of Pines" Forest Science vol. 4, No. 3 (Sep.), pp. 185-195. _
Hanover, James W. (1976) "Accelerated-Optimal-Growth: A New Concept in Tree Production" American Nurseryman vol. Unknown (Nov.), pp. 12, 13, 58, 59, 61 and 62. _
Pharis, R. P. (1976) "Chapter 13--Manipulation of Flowering in Conifers Through the Use of Plant Hormones" Proceedings in Life Sciences--Modern Methods in Forest Genetics (Ed. Miksche) Pub. Springer-Verlag, N.Y., pp. 265-282. _
Eickholt E. H.
Feyrer James R.
Weyerhaeuser Company
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