北京林业大学学报2025，Vol.47Issue(9)：57-66,10.DOI:10.12171/j.1000-1522.20250217
中国东部不同纬度代表性树种休眠解除对低温的响应特征
Response characteristics of dormancy release of representative tree species at different latitudes in eastern China to chilling temperature
摘要
Abstract
[Objective]The response of dormancy release to chilling temperatures is fundamental for understanding how plants adapt to environment.This paper aims to explore different response patterns of tree species from various latitudes in China,which can provide experimental evidence and theoretical support for phenological research.[Method]Representative tree species from high(42°N),middle(36°N),and low(30°N)latitudes in eastern China were selected for controlled experiments by climate chambers.Budburst timing and budburst rates were recorded following continuous chilling durations.Two exponential models were used to quantitatively analyze species-specific responses of budburst percentage and timing to chilling conditions,and latitudinal differences in rates of rest break were further compared.[Result]High-latitude tree species showed the highest growth rate of budburst percentage and the fastest decay rate of forcing requirement,indicating that they were more sensitive to chilling temperature.Mid-latitude tree species showed the highest rate of rest break,and the shortest average germination time,suggesting greater chilling efficiency.In contrast,low-latitude species showed the highest budburst percentage without chilling accumulation but the longest mean days to budburst,along with the largest coefficients of variation in key indicators,suggesting greater interspecific variability.[Conclusion]The mechanisms by which dormancy release responds to chilling in tree species vary along a latitude gradient.High-latitude tree species exhibite not only stronger dependence on chilling condition but also faster responses;mid-latitude tree species show greater adaptive capacity;and low-latitude evergreen tree species display highly heterogeneous response patterns.These findings enhance our understanding of chilling adaptation strategies across ecological types and offer theoretical support for forest regeneration,species introduction,and cultivation zoning under future climate warming scenarios.关键词
纬度梯度/休眠解除/积冷响应/气候变化/过程模型Key words
latitudinal gradient/dormancy release/chilling accumulation response/climate change/process model分类
农业科技引用本文复制引用
何佳,周燕,李志骏,赵宇,郑韵清,吴家胜,张瑞,刁松锋..中国东部不同纬度代表性树种休眠解除对低温的响应特征[J].北京林业大学学报,2025,47(9):57-66,10.基金项目
国家自然科学基金项目(32171832),国家重点研发计划(2022YFD2200400),国家级科技成果推广项目(2023133107). （32171832）
