Wood anatomy chronologies of Scots pine in the foothills of the Western Sayan (Siberia)

IF 3.4 2区农林科学 Q1 FORESTRY Journal of Forestry Research Pub Date : 2024-02-09 DOI:10.1007/s11676-023-01692-5

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Abstract

Recent methodological advances in quantitative wood anatomy have provided new insights into the climatic responses of radial growth at the scale of cell structure of tree rings. This study considered long-term chronologies of tracheid measurements, indexed by a novel approach to separate their specific climatic responses from signal recorded in cell production (closely reflected in tree-ring width). To fill gaps in understanding the impact of climate on conifer xylem structure, Scots pine (Pinus sylvestris L.) trees > 200 years old were selected within the forest-steppe zone in southern Siberia. Such habitats undergo mild moisture deficits and the resulting climatic regulation of growth processes. Mean and maximum values of cell radial diameter and cell wall thickness were recorded for each tree ring. Despite a low level of climatogenic stress, components of cell chronologies independent of cambial activity were separated to obtain significant climatic signals revealing the timing of the specific stages of tracheid differentiation. Cell expansion lasted from mid-April to July and was impacted similarly to tree-ring width (stimulated by precipitation and stressed by heat), maximum cell size formed late June. A switch in the climatic responses of mean anatomical traits indicated transition to latewood in mid-July. Secondary wall deposition lasted until mid-September, suppressed by end of season temperatures. Generally, anatomical climatic responses were modulated by a less dry May and September compared with summer months.

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西萨扬山麓（西伯利亚）苏格兰松树的木材解剖年表

摘要木材定量解剖学方法的最新进展为从树木年轮细胞结构的角度了解径向生长对气候的反应提供了新的视角。本研究考虑了管胞测量的长期年代学，并采用一种新方法将其特定的气候响应与细胞生产中记录的信号（密切反映在树轮宽度中）进行了索引。为了填补了解气候对针叶树木质部结构影响的空白，研究人员在西伯利亚南部的森林草原地带选择了树龄为 200 年的苏格兰松树。这种栖息地会出现轻微的缺水现象，并由此对生长过程进行气候调节。记录了每个树环的细胞径向直径和细胞壁厚度的平均值和最大值。尽管气候胁迫程度较低，但还是分离出了独立于木质部活动的细胞年代学成分，从而获得了重要的气候信号，揭示了气管分化特定阶段的时间。细胞扩展从四月中旬持续到七月，其影响与树环宽度类似（受降水刺激，受高温胁迫），细胞的最大尺寸在六月下旬形成。平均解剖特征的气候响应变化表明，在 7 月中旬向晚材过渡。次生木壁沉积一直持续到 9 月中旬，受到季末温度的抑制。总体而言，与夏季相比，5 月和 9 月不太干燥，这调节了解剖学气候反应。

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来源期刊

Journal of Forestry Research FORESTRY-

CiteScore

7.30

自引率

3.30%

发文量

2538

期刊介绍： The Journal of Forestry Research (JFR), founded in 1990, is a peer-reviewed quarterly journal in English. JFR has rapidly emerged as an international journal published by Northeast Forestry University and Ecological Society of China in collaboration with Springer Verlag. The journal publishes scientific articles related to forestry for a broad range of international scientists, forest managers and practitioners.The scope of the journal covers the following five thematic categories and 20 subjects: Basic Science of Forestry, Forest biometrics, Forest soils, Forest hydrology, Tree physiology, Forest biomass, carbon, and bioenergy, Forest biotechnology and molecular biology, Forest Ecology, Forest ecology, Forest ecological services, Restoration ecology, Forest adaptation to climate change, Wildlife ecology and management, Silviculture and Forest Management, Forest genetics and tree breeding, Silviculture, Forest RS, GIS, and modeling, Forest management, Forest Protection, Forest entomology and pathology, Forest fire, Forest resources conservation, Forest health monitoring and assessment, Wood Science and Technology, Wood Science and Technology.