科尔沁沙地不同种源元宝枫功能性状变异及其环境驱动因子
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1.中国林业科学研究院华北林业实验中心;2.中国林业科学研究院;3.河北农业大学林学院

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S718.5????

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科技部基础资源调查专项(2019FY100802_02);中国林科院央级公益性研所本业务费专资重点(CAFYBB2020ZB005)


Variation of Functional Traits and Environmental Driving Factors of Different Species Origins of Acer truncatum in the Horqin Sandy Land
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    摘要:

    【目的】研究不同种源地木本油料植物功能性状变异及其环境驱动因子,对其核心育种群体构建和良种选育具有重要的意义。【方法】文章以分布于科尔沁沙地周围的乌丹塔拉、松树山、代钦塔拉3个中国现存最大的元宝枫天然林为研究对象,测定其叶片和种子功能性状、土壤理化性质,同时结合气候数据,采用方差分析、相关性分析、RDA排序分析以及构建PLS-SEM模型等方法,研究内蒙地区不同种源地元宝枫功能性状的变异程度以及性状与环境之间的相关性,探究元宝枫功能性状与环境因子之间的关系。【结果】结果表明:(1)3地元宝枫各个功能性状的差异性明显,各性状的变异系数表现为比叶面积(SLA)>油酸含量(OA)>种子长宽比(ZC∶ZK)>碳氮比(C∶N)>神经酸含量(NA)>种子油脂含量(OC)>亚油酸(LOA)>叶片碳含量(LCC),种源间变异系数范围为3.81%~19.51%,种源内变异系数范围为3.60%~14.64%,种源间变异大于种源内变异;(2)3个种源地中,代钦塔拉地区油脂、亚油酸含量最高,乌旦塔拉地区的神经酸含量最高;(3)相关性结果显示,元宝枫功能性状与环境因子间存在显著的相关关系;(4)RDA分析结果显示,环境因子可以解释24.1%的元宝枫功能性状变异,土壤有机质(SOM)和气温季节性变异系数(BIO-4)为主导生态因子,气象和土壤共同决定元宝枫功能性状的变异,且气象因子起主导作用;(5)PLS-SEM模型显示,元宝枫叶片及种子性状与油脂指标之间的路径系数较小,协同作用不显著,年均温是元宝枫油脂相关指标的主要影响因子,且其与油脂相关性表现出负相关,即较低的温度有利于元宝枫种实油脂的积累。【结论】研究表明,气象是驱动元宝枫功能性状变异的主导环境因子,且气温是决定元宝枫种实油脂含量的关键因子,该研究结果可为油用元宝枫定向培育提供理论基础。

    Abstract:

    【Objective】 The study of the functional trait variation and environmental drivers of woody oilseed plants in different origins is of great significance for the construction of core breeding populations and the selection of improved seeds. 【Methods】 In this study, three of the largest existing natural forests of Acer truncatum in China, such as Udantara, Pine Mountain and Dai Chintara distributed around the Horqin Sandy Land, the functional traits of leaves and seeds and the soil physicochemical properties were determined, and the methods of ANOVA, correlation analysis, RDA ranking analysis and PLS-SEM model were used to study the degree of variation of functional traits and the correlation between traits and the environment in different origins in Inner Mongolia. To explore the relationship between functional traits and environmental factors of A. truncatum. 【Result】 The results showed that: (1) The differences in each functional trait of the three A. truncatum were obvious, and the coefficient of variation of each trait was as follows: specific leaf area (SLA) >oleic acid content (OA) >seed aspect ratio (ZC∶ZK> carbon-nitrogen ratio (C∶N) > nerve acid content (NA) >seed oil content (OC) >linoleic acid (LOA) >The leaf carbon content (LCC), the inter-source coefficient of variation ranged from 3.81%~19.51%, and the intra-source variation coefficient ranged from 3.60%~14.64%, and the inter-source variation was greater than the intra-source variation. (2) Among the three source areas, the content of oil and linoleic acid was the highest in the Dai Chintara area, and the highest content of nerve acid in the Udantara area. (3) The correlation results showed that there was a significant correlation between the functional traits of A. truncatum and environmental factors. (4) The RDA analysis results showed that environmental factors could explain 24.1% of the functional trait variation of A. truncatum, soil organic matter (SOM) and temperature seasonal coefficient of variation (BIO-4) were the dominant ecological factors, and meteorology and soil jointly determined the variation of A. truncatum functional traits, and meteorological factors played a leading role. (5) The PLS-SEM model showed that the path coefficient between the leaf and seed traits and the oil index of A. truncatum was small, and the synergy effect was not significant, and the average annual temperature was the main influencing factor of the oil-related indexes of A. truncatum fat, and its correlation with oil showed a negative correlation, that is, the lower temperature was conducive to the accumulation of solid oil of A. truncatum seed. 【Conclusion】 This study found that meteorology is the dominant environmental factor driving the variation of functional traits of A. truncatum, and temperature is the key factor determining the solid oil content of A. truncatum seeds, which can provide a theoretical basis for the directional cultivation of A. truncatum for oil.

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王雨晴,吴莎,许言,等.科尔沁沙地不同种源元宝枫功能性状变异及其环境驱动因子[J].西北植物学报,2024,44(2):300-309

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  • 收稿日期:2023-08-17
  • 最后修改日期:2023-10-24
  • 录用日期:2023-11-17
  • 在线发布日期: 2024-01-19
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