文献类型：期刊文献

中文题名：宝天曼8种阔叶树木材密度的解剖学决定因素及其与叶性状的协同与权衡

英文题名：Anatomical Determinants of Wood Density of Eight Broad-Leaved Tree Species in Baotianman and Their Coordination and Trade-off with Leaf Traits

作者：杭宇杰[1,2,3] 陈志成[2,3] 王林[1] 牛保亮[2,3] 刘松松[4] 于博[4] 王晓[4] 刘世荣[2,3]

第一作者：杭宇杰

机构：[1]山西农业大学林学院,晋中030801;[2]国家林业和草原局森林生态环境重点实验室、中国林业科学研究院森林生态环境与自然保护研究所,北京100091;[3]河南宝天曼森林生态系统国家野外科学观测研究站,南阳474350;[4]河南内乡宝天曼国家级自然保护区管理局,内乡474350

年份：2024

卷号：60

期号：4

起止页码：62-70

中文期刊名：林业科学

外文期刊名：Scientia Silvae Sinicae

收录：CSTPCD;;EI(收录号：20242216162251);Scopus;北大核心:【北大核心2023】；CSCD:【CSCD2023_2024】；

基金：中国林业科学研究院基本科研业务费专项(CAFYBB2020QB009);国家重点研发计划(2021YFD2200405,2023YFE0105100-2)。

语种：中文

中文关键词：木材密度;功能性状;木质部解剖;纤维性状;失膨压时相对含水量

外文关键词：wood density;functional trait;xylem anatomy;fiber trait;relative water content at turgor loss point

分类号：S718.43

摘要：【目的】探究影响木材密度的解剖学机制,揭示茎叶解剖和生理性状的协同与权衡关系,有助于阐明不同树种适应环境的生理生态机制。【方法】选择宝天曼天然林中常见的8种落叶阔叶树,测定木材密度、木质部导管及纤维等解剖性状、叶片压力-容积曲线参数等21个茎叶性状,探究决定木材密度的解剖学性状,分析茎叶性状的协同和权衡关系。【结果】1) 8个树种的木材密度与组成木质部的导管、薄壁组织和纤维组织这3大组织的比例都不相关,更多受到纤维细胞性状的影响。2)对木材密度影响最大的木质部性状是纤维细胞腔占横截面的比例,其次是纤维细胞壁占纤维细胞的比例、纤维细胞壁厚与腔直径比、纤维细胞壁厚度等性状。3)木材密度与叶片单叶面积、失膨压时相对含水量和弹性模量呈负相关。4)失膨压时相对含水量与导管水力直径、最大导管直径、平均导管直径、纤维细胞腔面积、纤维细胞腔直径呈正相关;与导管密度、纤维细胞壁厚与腔直径比、纤维细胞壁占横截面比例呈负相关。【结论】木材密度主要由纤维细胞性状决定,而非导管和薄壁组织性状;高的叶片忍耐失水能力耦合于致密的茎纤维细胞和木材密度。
【Objective】This study aims to explore the anatomical mechanisms that affect wood density and reveal the coordination and trade-off relationships of anatomy and physiological traits between stems and leaves traits can deepen the understanding of physiological and ecological mechanisms of different tree species adapting to the environment.【Method】Eight common deciduous broad-leaved tree species in the natural forest of Baotianman were selected as the research objects.Twenty-one stem and leaf traits of these tree species,including wood density,xylem vessels and fibers and other anatomical traits,and leaf pressure volume curve parameters,were measured to explore the anatomical traits that determine wood density and to analyze the coordination and trade-off between stem and leaf traits.【Result】1)The wood density of 8 tree species in this study was not correlated with the proportions of the three major tissues that make up the xylem:vessels,parenchyma tissue and fiber tissue.Wood density was more influenced by traits of fiber cells.2)The xylem traits that have the greatest impact on wood density was the ratio of fiber lumen to cross-sectional area,followed by the ratio of fiber wall to fiber cell,the ratio of fiber wall thickness to lumen diameter and the fiber cell wall thickness.3)Wood density was negatively correlated with individual leaf area,relative water content at turgor loss point and elasticity modulus.4)The relative water content at turgor loss point was positively related to hydraulic vessel diameter,maximum vessel diameter,mean vessel diameter,fiber cell lumen area and fiber cell lumen diameter,and negatively related to vessel density, the ratio of fiber wall thickness to lumen diameter and the ratio of fiber wall to cross-sectional area. 【Conclusion】The wood density is mainly determined by the fiber cell traits, rather than the traits of vessel and parenchyma tissue. The strong capacity of leaves to tolerate dehydration is coupled with the dense stem fiber cells and wood density.