文献类型：期刊文献

中文题名：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

英文题名：Response characteristics of dormancy release of representative tree species at different latitudes in eastern China to chilling temperature

作者：何佳[1,2] 周燕[2] 李志骏[2] 赵宇[2] 郑韵清[2] 吴家胜[2] 张瑞[2] 刁松锋[1]

第一作者：何佳

机构：[1]中国林业科学研究院经济林研究所,经济林种质创新与利用国家林业和草原局重点实验室,河南郑州450003;[2]浙江农林大学森林食物资源挖掘与利用全国重点实验室,浙江杭州311300

年份：2025

卷号：47

期号：9

起止页码：57-66

中文期刊名：北京林业大学学报

外文期刊名：Journal of Beijing Forestry University

收录：;北大核心:【北大核心2023】；

基金：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)。

语种：中文

中文关键词：纬度梯度;休眠解除;积冷响应;气候变化;过程模型

外文关键词：latitudinal gradient;dormancy release;chilling accumulation response;climate change;process model

分类号：S718.5

摘要：【目的】明晰植物休眠解除对低温的响应机制是理解其适应环境变化的重要基础,探究我国不同纬度树种休眠解除对低温的差异响应规律,以期为物候研究提供试验依据与理论支持。【方法】选取我国东部地区高纬度(42°N)、中纬度(36°N)及低纬度(30°N)地区的典型树种,开展人工气候室控制试验,连续积冷处理后观测萌芽时间,并统计萌芽率。基于指数模型定量分析树种萌芽率和萌芽时间对低温的响应过程,进一步比较不同纬度各树种在休眠解除速率方面的差异。【结果】高纬度树种的萌芽率增长速率和积温需求量衰减速率均最高,表明其对积冷的响应更为敏感。中纬度树种休眠解除速率最高,且平均萌芽时间最短,表明其积冷效率更高。低纬度树种在无积冷条件下平均萌芽率最高,但平均萌芽时间最长,且相关指标的变异系数最大,表明其种间差异性更大。【结论】树种休眠解除响应积冷机制存在纬度梯度差异,高纬度树种表现出更强的积冷依赖性与快速响应能力,中纬度树种具备较强适应性,低纬度常绿树种的响应机制则呈现出异质性强的特征。研究结果有助于理解不同生态型树种的低温适应机制,并为未来气候变暖背景下的森林更新、物种引种与区划管理提供理论支持。
[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]Highlatitude 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.