东北温带针阔混交林32个树种非结构性碳水化合物的器官间变化与协同  

Variation and coordination of non-structural carbohydrates among organs in 32 tree species from a temperate conifer-broadleaf mixed forest in Northeast China

作　　者：胡晓慧 王兴昌[1] 董涵君 刘玉龙 苑丹阳 柳荻 王晓春[1] HU Xiao-Hui;WANG Xing-Chang;DONG Han-Jun;LIU Yu-Long;YUAN Dan-Yang;LIU Di;WANG Xiao-Chun(School of Ecology,Key Laboratory of Sustainable Forestry Ecosystem Management-Ministry of Education,Northeast Forestry University,Harbin 150040,China;Heilongjiang Ecological Institute,Harbin 150040,China)

机构地区：[1]东北林业大学生态学院,森林生态系统可持续经营教育部重点实验室,哈尔滨150040 [2]黑龙江省生态研究所,哈尔滨150040

出　　处：《植物生态学报》2025年第3期432-445,共14页Chinese Journal of Plant Ecology

基　　金：国家自然科学基金(32171765和42177421)。

摘　　要：探索非结构性碳水化合物(NSC)在树种和器官之间的变化特征以及树木功能类群之间的差异,是深入理解植物碳分配特征的重要课题。该研究在黑龙江省老爷岭的典型温带针阔混交林中选择32个树种,系统性分析了叶、枝、树皮、边材、心材、树桩、粗根和细根8种器官NSC浓度随器官的变化特征及其与木材孔性的关系。结果显示:(1)NSC及其组分浓度在器官间的变异大于树种间的变异。由碳源器官(叶)向碳汇器官(树皮和粗根)、慢速周转器官(树干木材)浓度逐渐减小,快速周转器官(叶和细根)的可溶性糖:淀粉比值最高。(2)大多数树种的NSC及其组分浓度在器官之间不存在相关关系,而且大部分器官的可溶性糖和淀粉浓度之间也不存在显著的相关关系。(3)木材孔性对NSC及其组分浓度有显著影响。从无孔材、散孔材到环孔材,树皮可溶性糖浓度逐渐降低,除心材外的各器官淀粉浓度以及边材和地下器官的总NSC浓度逐渐升高。环孔材树种将更多NSC运输到非光合器官而保持较低的叶NSC浓度,这是保证其整树充足碳供应的重要策略。这些结果表明典型温带树种不同器官存储NSC的功能分化明显,木材孔性对多器官NSC及其组分浓度有不可忽视的影响。Aims Exploring the variations of non-structural carbohydrates(NSC)among tree species and organs,as well as the differences in NSC among tree functional groups,is an important topic for a deeper understanding of the carbon allocation characteristics of plants.Methods 32 tree species were selected from a typical conifer-broadleaf mixed forest in Laoyeling,Heilongjiang Province,and nine organs were collected to systematically analyze the changes in NSC concentration with organs and wood porosity.Important findings(1)The effect of organs on concentrations of NSC and its components was greater than that of tree species.Among different organs,there was a gradual decrease in NSC from carbon source organs(leaf)to storage organs(bark and coarse root)and slow turnover organs(trunk wood);the sugar starch ratio was highest in fast turnover organs(leaf and fine root).(2)There were no significant correlations of the concentration(s)of NSC or its components between organs for most tree species;and there were no significant correlations between the concentrations of soluble sugar and starch in most organs.(3)Wood porosity had a significant effect on the concentrations of NSC and its components.From non-porous wood,diffuse-porous wood to ring-porous wood species,the soluble sugar concentration in bark gradually decreased;while the starch concentration in all organs except heartwood,as well as the total NSC concentration in sapwood and belowground organs,gradually increased.Transporting a greater proportion of NSC to non-photosynthetic organs,and thus keeping low concentrations of NSC in leaves,is an important strategy to ensure adequate carbon supply to the whole tree.These results indicate the obvious functional differentiation of NSC storage in different organs of typical temperate forest tree species,and the significant effect of wood porosity on the concentrations of NSC and its components in multi-organs.

关 键 词：非结构性碳水化合物 器官间变异 种间变异 木材孔性 协同作用 温带森林 

分 类 号：S718.5[农业科学—林学]