ArticleAnnals of botany2024
Effectiveness of freezing temperatures on dormancy release of temperate woody species.
Article in Annals of botany, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Comparison of chilling requirements of boreal and temperate tree species in Germany and North America.International journal of biometeorology · 2026Article
- Effective chilling temperatures for dormancy release in extratropical forest trees increase from cold to warm regions.Proceedings of the National Academy of Sciences of the United States of America · 2026Article
- Article
- Chilling Accumulation Shapes Transcriptomic Responses to Warming Exposure During Grapevine Deacclimation.Physiologia plantarumArticle
- Is It Cold Enough? Effects of Artificial and Natural Chilling on Budbreak and Frost Hardiness in Acer saccharum (Marsh.).Physiologia plantarumArticle
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Authors and funding
5 authors.
Funding
Abstract
BACKGROUND AND
aimsSpring phenological change of plants in response to global warming may affect many ecological processes and functions. Chilling temperature regulates budburst date by releasing dormancy. However, whether freezing temperatures (<0 °C) contribute to dormancy release remains of debate. Our poor understanding of the role of chilling makes estimating shifts in budburst date difficult.
methodsA 2-year chilling-forcing experiment was explicitly designed to test the effects of chilling temperatures on dormancy release of nine temperate woody species in Beijing, China. A total of 1620 twigs were first exposed to a wide range of temperatures (-10 to 10 °C) with different durations and then moved to growth chambers. Based on budburst data in experimental conditions, we examined whether freezing temperatures are effective on dormancy release. We also developed a new framework for constructing chilling functions based on the curve between chilling duration and forcing requirement (FR) of budburst. The chilling function derived from this framework was not affected by experimental forcing conditions. KEY
resultsWe demonstrated that freezing temperatures down to -10 °C were effective in dormancy release. The rate of dormancy release, indicated by the rate of decay in the chilling duration-FR curve, did not differ significantly between chilling temperatures in most cases, although it exhibited a maximum value at 0 or 5 °C. The chilling function-associated phenological models could simulate budburst date from independent experimental and observational data with a mean RMSE of 7.07 d.
conclusionsThe effective freezing temperatures found here are contrary to the well-known assumption of <0 °C temperature generally not contributing to accumulated chilling in many previous chilling functions. A chilling function assuming that temperature below an upper temperature threshold has the same effects on dormancy release could be adopted to calculate chilling accumulation when using experiments to develop spring phenological models based on the chilling-forcing relationship.
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