全球尺度上凋落物初始酚类含量特征及影响因素  

Global patterns and influencing factors of initial concentrations of phenols in plant litter

作　　者：余继梅 吴福忠 袁吉 金遐 魏舒沅 袁朝祥 彭艳 倪祥银 岳楷 YU Ji-Mei;WU Fu-Zhong;YUAN Ji;JIN Xia;WEI Shu-Yuan;YUAN Chao-Xiang;PENG Yan;NI Xiang-Yin;YUE Kai(School of Geographical Sciences,Fujian Normal University,Fuzhou 350007,China;Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education,Fujian Normal University,Fuzhou 350007,China)

机构地区：[1]福建师范大学地理科学学院,福州350007 [2]福建师范大学湿润亚热带生态-地理过程教育部重点实验室,福州350007

出　　处：《植物生态学报》2023年第5期608-617,共10页Chinese Journal of Plant Ecology

基　　金：国家自然科学基金(31922052、32171641和32022056)。

摘　　要：酚类物质是凋落物分解过程中难分解的有机组分,其初始含量极大地影响了凋落物的后续分解过程,但全球尺度上凋落物酚类物质的初始含量特征及影响因素并不清楚。通过meta分析已发表的相关科研论文,在全球尺度上探讨了凋落物总酚和可溶性酚(溶于水、酸、甲醇、乙醇)的含量特征及气候、菌根类型、植物生活型和土壤性质等因素对其的影响。结果表明:(1)全球凋落物初始总酚、可溶性酚平均含量分别为65和88 mg·g^(-1);(2)菌根类型对根凋落物总酚含量及叶凋落物可溶性酚含量有显著影响,同时具有丛枝菌根和外生菌根植物的根凋落物总酚含量显著低于具有外生菌根植物凋落物,而同时具有丛枝菌根和外生菌根植物的叶凋落物可溶性酚含量显著高于具有丛枝菌根植物凋落物;(3)系统分类(裸子植物、被子植物)和叶形态(针叶、阔叶)对叶凋落物总酚含量有显著影响,阔叶与被子植物凋落物总酚含量分别显著高于针叶和裸子植物凋落物;(4)平均气温日较差、最干旱月份降水量、最干季降水量与叶凋落物总酚含量呈显著正相关关系;(5)最暖季降水量、土壤含水率与叶凋落物可溶性酚含量呈显著负相关关系;(6)叶形态对叶凋落物总酚含量的影响最为显著。这些研究结果对了解凋落物各功能性状与酚类物质之间的关系及预测凋落物在未来气候变化条件下的分解特征具有一定意义。Aims Phenols are organic components that are resistant to be decomposed during litter decomposition,and their initial content greatly affects the subsequent decomposition process.However,patterns of their initial content in plant litter at the global scale are unclear.In this paper,the content of total phenol and soluble phenol in litter and their response to climate,mycorrhizal association,life forms and soil properties were assessed at the global scale.Methods Data were collected from published scientific articles before November 5,2021,the content and influencing factors of total and soluble phenol in plant litter were discussed at the global scale.Among them,98 articles had total phenol content,covering 350 observations,and 18 articles had soluble phenol content,covering 70 observations.The linear mixed model was used to compare the differences of total phenol and soluble phenol content in root and leaf litter of different functional traits.The linear mixed model was also used to evaluate the effects of different environmental factors on total phenol and soluble phenol content in root and leaf litter.The linear mixed effect model selection method was used to further evaluate the relative importance of influencing variables on the initial total phenol and soluble phenol content in litter.Important findings Results showed that(1)The average initial total phenolic and soluble phenolic content of the global litter was 65 and 88 mg·g^(-1),respectively.(2)Mycorrhizal association had a significant effect on the total phenolic content in root litter and the soluble phenolic content in leaf litter.The total phenolic content in root litter of plants with both arbuscular mycorrhiza and ectomycorrhiza was significantly lower than that in litter of plants with ectomycorrhiza,while the soluble phenolic content in leaf litter of plants associated with both arbuscular mycorrhiza and ectomycorrhiza was significantly higher than that in litter from plants associated with arbuscular mycorrhiza.(3)Phylogenetic types(gymnosperm,

关 键 词：凋落物 菌根 叶形态 总酚 可溶性酚 气候 

分 类 号：Q948[生物学—植物学]