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| 樟和云南樟枝条功能性状的差异性研究 |
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张雪莲1,2,3, 刘纪元1,2,3, 王苓汝1, 陶冶2,3, 周多奇1*
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1.安庆师范大学 生命科学学院/皖西南生物多样性研究与生态保护安徽省重点实验室,安徽 安庆 246133；2.中国科学院新疆生态与地理研究所,荒漠与绿洲生态国家重点实验室/干旱区生态安全与可持续发展重点实验室,乌鲁木齐 830011；3.中国科学院新疆生态与地理研究所,新疆干旱区生物多样性保育与应用重点实验室,乌鲁木齐 830011
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| 摘要: |
| 摘 要：樟（Camphora officinarum）和云南樟（Camphora glandulifera）同属于樟科（Lauraceae）樟属（Camphora），为了探究两种植物之间是否具有相同或相似的功能性状及协变特征，以樟和云南樟2年生枝条为研究对象，测定枝条形态、构件生物量及含水量等18个性状，采用描述统计分析、相关性分析、异速生长分析以及植物性状网络分析系统解析了两种植物枝条内各构件生物量与水分分配、形态性状间异速生长关系、个体大小依赖特征及功能性状网络关系的差异。结果表明，（1）云南樟2年生枝条各构件形态性状及生物量均大于樟。樟和云南樟生物量指标均达到中等变异程度，含水量指标均属于弱变异。樟（93.6%）与云南樟（92.5%）叶片占全叶生物量的比重接近，但云南樟（39.0%）茎生物量分配比例比樟（15.5%）更大。樟（92.11%）与云南樟（92.32%）叶内叶片水分含量占比无显著差异，但云南樟（40.43%）枝内茎水分含量占比高于樟（19.64%）。（2）樟与云南樟各构件生物量间、形态性状间以及含水量间均具有异速生长关系，且云南樟枝条各构件间存在较多指数≠1的异速关系。（3）在叶水平上，樟与云南樟生物量和水分分配具有相似的个体大小依赖特征；但在枝水平上，二者存在不同的个体大小依赖特征。（4）性状网络分析显示，云南樟枝条性状网络更为复杂，即云南樟枝条性状间具有更密切的联系；二者形态和生物量性状的协同关系均较高，但水分性状相对独立。综上，同属的樟和云南樟枝条性状及性状关联既有较大差异性又存在一定相似性，可能主要与二者不同的内在生长特性有关。 |
| 关键词: 枝条性状 生物量分配 异速生长 含水量 形态 植物功能性状网络 |
| DOI：10.11931/guihaia.gxzw202410029 |
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| 基金项目:国家自然科学基金、NSFC-新疆联合基金重点项目 |
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| Difference of functional traits of Camphora officinarum and Camphora glandulifera tree branches |
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ZHANG Xuelian1,2,3, LIU Jiyuan1,2,3, WANG Lingru1, TAO Ye2,3, ZHOU Duoqi1*
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1. Anhui Province Key Laboratory of the Biodiversity Study and Ecology Conservation in Southwest Anhui, College of Life Sciences, Anqing Normal University, Anqing 246133 , Anhui, China; 2. State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; 3. Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
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| Abstract: |
| Abstract: Camphora officinarum and Camphora glandulifera belonged to the genus Camphora in the Lauraceae. In order to explore whether the two plants exhibited the same or similar functional traits and covariant characteristics, the biennial branches of C. officinarum and C. glandulifera were used as research objects to measure 18 traits, including branch morphology, component biomass and water content. The descriptive statistical analysis, correlation analysis, allometric analysis and plant trait network analysis were used to explore the differences in biomass and water allocations, allometric relationship between morphological traits, individual size-dependent characteristics and functional trait network relationships between the two species. The results showed that (1) The biennial branches of C. glandulifera had higher morphological traits and component biomass than C. officinarum. The biomass indices for C. officinarum and C. glandulifera demonstrated moderate variability, while the water content indices displayed weaker variability. The proportions of lamina biomass to total leaf biomass of C. officinarum (93.6%) and C. glandulifera (92.5%) were close. However, C. glandulifera (39.0%) had a larger proportion of stem biomass to total branch biomass than C. officinarum (15.5%). There was no significant difference in the water content percentage of inner leaves between C. officinarum (92.11%) and C. glandulifera (92.32%). However, the water content percentage in the inner stems of C. glandulifera (40.43%) was significantly higher than that of C. officinarum (19.64%). (2) Allometric relationships were observed between component biomasses, morphological traits and water contents of C. officinarum and C. glandulifera branches, and many allometric relationships with the scaling exponent ≠ 1 were found for C. glandulifera branch components. (3) At the leaf level, the biomass and water allocations of C. officinarum and C. glandulifera had similar individual size-dependent characteristics; however, at the branch level, different individual size-dependent characteristics of the two species existed. (4) Trait network analysis showed that C. glandulifera branch trait network was more complex than C. officinarum, that is, C. glandulifera branch traits were more closely related; the covariant relationship between morphological and biomass traits was high, but the water traits were relatively independent. In conclusion, the branch traits and trait associations of C. officinarum and C. glandulifera of the same genus exhibited not only great differences, but also a certain similarity, which may be mainly related to their different intrinsic growth property. |
| Key words: Branch trait Biomass allocation Allometry Water content Morphology Plant functional trait network. |
