一级根系解剖性状的海拔变异及其适应机制。

IF 6.3 1区 生物学 Q1 PLANT SCIENCES
Plant Diversity Pub Date : 2024-09-25 eCollection Date: 2025-03-01 DOI:10.1016/j.pld.2024.09.008
Xue Wang, Xinrui Liu, Shuang Chen, Jiang Zhu, Yanqi Yuan, Rong Zhu, Kaixi Chen, Xue Yang, Xiaochun Wang, Weiyi Mo, Ruili Wang, Shuoxin Zhang
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引用次数: 0

摘要

根系解剖性状对认识根系生理功能与生态过程的关系起着重要作用。为了研究植物根系解剖性状的变化以适应不同的环境,本研究在海拔2000 m的太白山北坡不同植被带采集了82种植物的一阶根系,测量了根系解剖性状的4个关键指标——柱径(SD)、皮质厚度(CT)、根径(RD)和柱径/根径比(SDRD)。与其他海拔高度相比,温带桦树和冷杉林植物的SD、CT、RD和SDRD较薄。我们发现根解剖性状的海拔差异在很大程度上可以用系统发育分类(枝)来解释。此外,土壤容重的变化主要受土壤容重的驱动,而CT和RD的变化主要受土壤速效氮的影响。当系统发育因素从我们的分析中剔除时,在不同海拔地区观察到RD与根系解剖性状(SD和CT)之间的异速生长关系。本研究揭示了系统发育和环境对根系解剖性状海拔变化的影响,进一步支持了根系解剖性状(SD和CT)与RD之间的异速生长关系,为进一步了解根系解剖结构的进化和适应机制提供了依据,为预测根系解剖性状对全球变化的响应提供了依据。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Elevational variation in anatomical traits of the first-order roots and their adaptation mechanisms.

Elevational variation in anatomical traits of the first-order roots and their adaptation mechanisms.

Elevational variation in anatomical traits of the first-order roots and their adaptation mechanisms.

Elevational variation in anatomical traits of the first-order roots and their adaptation mechanisms.

Root anatomical traits play an important role in understanding the link between root physiological function and ecological process. To determine how plants change root anatomical traits to adapt to distinct environments, we measured four key root anatomical traits-stele diameter (SD), cortex thickness (CT), root diameter (RD), and the stele to root diameter ratio (SDRD)-of first-order roots of 82 species collected from different vegetation zones along a 2000 m altitudinal gradient on the northern slope of Taibai Mountain. Compared with other altitudes, plants located in temperate birch and fir forests had thinner SD, CT, RD, and SDRD. We found that elevational variation in root anatomical traits could largely be explained by phylogenetic taxonomy (clade). In addition, changes in SD were driven by soil bulk density, whereas variations in CT and RD were influenced by soil available nitrogen. When phylogenetic factors were removed from our analysis, allometric relationships between RD and root anatomical traits (SD and CT) were observed across different altitudes. Our study reveals the influence of phylogeny and environment on the elevational variation in root anatomical traits and further supports the allometric relationship between root anatomical traits (SD and CT) and RD. These findings enhance our understanding of the evolutionary and adaptive mechanisms of root anatomical structures, providing a basis for predicting how root anatomical traits respond to global changes.

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来源期刊
Plant Diversity
Plant Diversity Agricultural and Biological Sciences-Ecology, Evolution, Behavior and Systematics
CiteScore
8.30
自引率
6.20%
发文量
1863
审稿时长
35 days
期刊介绍: Plant Diversity (formerly Plant Diversity and Resources) is an international plant science journal that publishes substantial original research and review papers that advance our understanding of the past and current distribution of plants, contribute to the development of more phylogenetically accurate taxonomic classifications, present new findings on or insights into evolutionary processes and mechanisms that are of interest to the community of plant systematic and evolutionary biologists. While the focus of the journal is on biodiversity, ecology and evolution of East Asian flora, it is not limited to these topics. Applied evolutionary issues, such as climate change and conservation biology, are welcome, especially if they address conceptual problems. Theoretical papers are equally welcome. Preference is given to concise, clearly written papers focusing on precisely framed questions or hypotheses. Papers that are purely descriptive have a low chance of acceptance. Fields covered by the journal include: plant systematics and taxonomy- evolutionary developmental biology- reproductive biology- phylo- and biogeography- evolutionary ecology- population biology- conservation biology- palaeobotany- molecular evolution- comparative and evolutionary genomics- physiology- biochemistry
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