Tradeoffs between chilling and forcing in satisfying dormancy requirements for Pacific Northwest tree species

Frontiers in Plant Science
Constance A Harrington, Peter J Gould

Abstract

Many temperate and boreal tree species have a chilling requirement, that is, they need to experience cold temperatures during fall and winter to burst bud normally in the spring. Results from trials with 11 Pacific Northwest tree species are consistent with the concept that plants can accumulate both chilling and forcing units simultaneously during the dormant season and they exhibit a tradeoff between amount of forcing and chilling. That is, the parallel model of chilling and forcing was effective in predicting budburst and well chilled plants require less forcing for bud burst than plants which have received less chilling. Genotypes differed in the shape of the possibility line which describes the quantitative tradeoff between chilling and forcing units. Plants which have an obligate chilling requirement (Douglas-fir, western hemlock, western larch, pines, and true firs) and received no or very low levels of chilling did not burst bud normally even with long photoperiods. Pacific madrone and western redcedar benefited from chilling in terms of requiring less forcing to promote bud burst but many plants burst bud normally without chilling. Equations predicting budburst were developed for each species in our trials for a portio...Continue Reading

References

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Dec 4, 2013·Seminars in Speech and Language·Erika Hoff, Cynthia Core

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Citations

Apr 19, 2016·Evolutionary Applications·Sally N Aitken, Jordan B Bemmels
Nov 9, 2016·Frontiers in Plant Science·Rachid CheddadiPeter B Pearman
May 4, 2017·Global Change Biology·Constant SignarbieuxYann Vitasse
Aug 9, 2020·The New Phytologist·Catherine J ChamberlainE M Wolkovich
Oct 6, 2020·Frontiers in Plant Science·Xiaoli HuShucun Sun
Sep 2, 2017·Frontiers in Plant Science·Rongzhou ManQing-Lai Dang
Apr 7, 2019·Global Change Biology·Catherine J ChamberlainElizabeth M Wolkovich

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Software Mentioned

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