Relationships among cold hardiness, root growth potential and bud dormancy in three conifers - PubMed

Relationships among cold hardiness, root growth potential and bud dormancy in three conifers

K E Burr et al. Tree Physiol. 1989 Sep.

Abstract

Greenhouse-cultured, container-grown ponderosa pine (Pinus ponderosa var. scopulorum Engelm.), interior Douglas-fir (Pseudotsuga menziesii var. glauca (Beissn.) Franco) and Engelmann spruce (Picea engelmannii (Parry) Engelm.) were cold acclimated and deacclimated in growth chambers over 19 weeks. Stem cold hardiness, total new root length at 14 days and days to bud break were measured weekly. Relationships among cold hardiness, root growth potential (RGP) and bud dormancy suggest that cold hardiness, which can be measured quickly, could provide a useful basis for estimating the two other parameters. During cold acclimation, there was a lag period in which stem cold hardiness remained at -15 degrees C and RGP was at a minimum, in all three species. Douglas-fir and Engelmann spruce buds remained fully dormant during this lag period. Ponderosa pine buds had no chilling requirement for the loss of dormancy, and reached quiescence during the lag period. Immediately following the lag period, as stem cold hardiness progressed to -22 degrees C, RGP increased to a high plateau in all three species, and Douglas-fir and Engelmann spruce buds approached quiescence. Cold deacclimation and bud development began immediately on exposure to warm, long days, but RGP remained high until stem cold hardiness returned to approximately -15 degrees C. At bud break, cold hardiness and RGP were at the minimum.

Similar articles

• Comparison of three cold hardiness tests for conifer seedlings.

  Burr KE, Tinus RW, Wallner SJ, King RM. Burr KE, et al. Tree Physiol. 1990 Dec;6(4):351-69. doi: 10.1093/treephys/6.4.351. Tree Physiol. 1990. PMID: 14972928

• Relationship between carbohydrate concentration and root growth potential in coniferous seedlings from three climates during cold hardening and dehardening.

  Tinus RW, Burr KE, Atzmon N, Riov J. Tinus RW, et al. Tree Physiol. 2000 Oct;20(16):1097-104. doi: 10.1093/treephys/20.16.1097. Tree Physiol. 2000. PMID: 11269961

• Freezing tolerance of conifer seeds and germinants.

  Hawkins BJ, Guest HJ, Kolotelo D. Hawkins BJ, et al. Tree Physiol. 2003 Dec;23(18):1237-46. doi: 10.1093/treephys/23.18.1237. Tree Physiol. 2003. PMID: 14652223

• Champions of winter survival: cold acclimation and molecular regulation of cold hardiness in evergreen conifers.

  Chang CY, Bräutigam K, Hüner NPA, Ensminger I. Chang CY, et al. New Phytol. 2021 Jan;229(2):675-691. doi: 10.1111/nph.16904. Epub 2020 Sep 27. New Phytol. 2021. PMID: 32869329 Review.

• Ectomycorrhizal fungi associated with ponderosa pine and Douglas-fir: a comparison of species richness in native western North American forests and Patagonian plantations from Argentina.

  Barroetaveña C, Cázares E, Rajchenberg M. Barroetaveña C, et al. Mycorrhiza. 2007 Jul;17(5):355-373. doi: 10.1007/s00572-007-0121-x. Epub 2007 Mar 8. Mycorrhiza. 2007. PMID: 17345105 Review.

Cited by

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

  Harrington CA, Gould PJ. Harrington CA, et al. Front Plant Sci. 2015 Mar 3;6:120. doi: 10.3389/fpls.2015.00120. eCollection 2015. Front Plant Sci. 2015. PMID: 25784922 Free PMC article.

• Extreme low temperature tolerance in woody plants.

  Strimbeck GR, Schaberg PG, Fossdal CG, Schröder WP, Kjellsen TD. Strimbeck GR, et al. Front Plant Sci. 2015 Oct 19;6:884. doi: 10.3389/fpls.2015.00884. eCollection 2015. Front Plant Sci. 2015. PMID: 26539202 Free PMC article. Review.

LinkOut - more resources

• Full Text Sources

  • Silverchair Information Systems