东北常见树种叶色季节动态和影响因子研究  

Seasonal Dynamics and Influencing Factors of Leaf Color of Common Tree Species in Northeast China

作　　者：张冬乐 蒋旭博 王东男 谷加存[1,2] 杨剑飞 ZHANG Donge;JIANG Xubo;WANG Dongnan;GU Jiacun;YANG Jianfei(College of Forestry,Northeast Forestry University,Harbin 150040,Heilongjiang;Key Laboratory of Sustainable Forest Ecosystem Management-ministry of Education,Northeast Forestry University,Harbin 150040,Heilongjiang;College of Landscape Architecture,Northeast Forestry University,Harbin 150040,Heilongjiang)

机构地区：[1]东北林业大学林学院,黑龙江哈尔滨150040 [2]东北林业大学森林生态系统可持续经营教育部重点实验室,黑龙江哈尔滨150040 [3]东北林业大学园林学院,黑龙江哈尔滨150040

出　　处：《温带林业研究》2024年第3期8-16,共9页Journal of Temperate Forestry Research

基　　金：东北林业大学省级大学生创新创业计划资助项目(S202310225140)。

摘　　要：【目的】探究东北常见树种叶色季节动态变化及影响因素,以期为揭示植物叶片呈色机理和东北地区园林景观配置提供依据。【方法】本研究选取北美红枫、白桦、紫叶稠李和金叶榆等10种东北常见园林绿化树种为试材,对其色差参数(L*、a*、b*)、色素含量及可溶性糖含量进行测定,并与取样周期内的平均温度进行相关性分析。【结果】不同树种叶片中的色素含量及比例存在显著差异。在整个转色期,叶色季节动态受平均温度和内部各色素含量的综合影响。其中,所有色差参数与叶绿素含量、平均温度呈显著负相关(P<0.05),a*与花色苷含量呈显著正相关(P<0.05)。同时,相关性分析表明,叶片中可溶性糖含量在转色期变化并不显著,与叶色变化无显著相关性。【结论】随平均温度降低,秋色叶黄色树种及红色树种叶片中叶绿素含量逐渐降低。在黄色树种中类胡萝卜素与叶绿素比值升高,而红色树种花色苷与叶绿素比值升高。常色叶树种中紫叶稠李和辽东桤木叶片颜色及色素含量较为稳定,而紫叶李和金叶榆在后期出现复绿现象,分别由于花青素含量降低和叶绿素含量升高导致。【Objective】The objective of this study was to investigate the seasonal dynamics and influencing factors of leaf color in common tree species in northeast China,aiming to provide a basis for revealing the color mechanism of leaves and informing landscape configuration of northeast China.【Method】Ten commonly used tree species with colored leaves,including Acer rubrum,Betula platyphylla,Prunus virginiana and Ulmus pumila‘Jinye’,were selected as materials.The chromatic aberration parameters(L*,a*,b*),pigment content,and soluble sugar content of leaves were measured,followed by an analysis of their correlation with the mean temperature.【Result】The composition and proportion of pigments vary significantly among leaves from different tree species.The seasonal dynamics of leaf color were observed to be influenced by both average temperature and pigment content throughout the process of color change.The chromatic aberration parameters exhibited a significant negative correlation with both chlorophyll content and mean temperature(P<0.05).Conversely,the parameter a*showed a positive correlation with anthocyanin content(P<0.05).Meanwhile,correlation analysis revealed no significant changes in the content of soluble sugar in leaves during the color change period,suggesting that a lack of substantial association between soluble sugar content and leaf color change.【Conclusion】As the mean temperature decreased,there was a gradual decline in chlorophyll content among autumn-yellow and red leaves of species,while the carotenoids/chlorophyll ratio increased in yellow species.Additionally,the anthocyanin/chlorophyll ratio increased in red species.In the species with normal color leaves,the leaf color and pigment content of Prunus virginiana and Alnus hirsuta were relatively stable,while Prunus cerasifera‘Atropurpurea’and Ulmus pumila‘Jinye’exhibited regreening leaves in the later stage,which was caused by the decrease of anthocyanin content and the increase of chlorophyll content,respectively.

关 键 词：彩叶树种 叶色 色差参数 生理特征 平均温度 

分 类 号：S718.43[农业科学—林学]