8种珍珠菜属植物碳氮生态化学计量特征  

Carbon and Nitrogen Stoichiometric Characteristics of Eight Lysimachia Plants

作　　者：王沁言 陈延松 WANG Qin-yan;CHEN Yan-song(College of Life Sciences, Hefei Normal University, Hefei, Anhui 230601)

机构地区：[1]合肥师范学院生命科学学院,安徽合肥230601

出　　处：《安徽农业科学》2018年第16期1-3,7,共4页Journal of Anhui Agricultural Sciences

基　　金：安徽省自然科学基金项目(1608085MC62);安徽高校省级优秀青年人才基金重点项目(2013SQRL068ZD);合肥师范学院校级产学研项目(2016CXYZB009)

摘　　要：[目的]以8种珍珠菜属植物为研究对象,分析该属植物根、茎、叶的碳、氮生态化学计量分布特征。[方法]通过盆栽试验,测定碳、氮和碳氮比,分析生态化学计量特征在不同营养器官间的差异性及其相关性。[结果]在属级水平上,碳、氮生态化学计量在三大营养器官中总体分布为:叶碳含量>根碳含量>茎碳含量;叶氮含量>茎氮含量>根氮含量;根碳氮比>茎碳氮比>叶碳氮比。在物种水平上,8种珍珠菜属植物的叶碳含量均显著高于茎碳含量与根碳含量,除了疏头过路黄和轮叶过路黄的叶氮含量与茎和根的氮含量差异未达到显著性水平外,其他6种珍珠菜属植物叶氮含量也均显著高于茎氮含量与根氮含量,贯叶过路黄、过路黄、疏头过路黄与黑腺珍珠菜的叶碳氮比与茎碳氮比之间无显著性差异,但两者均显著低于根碳氮比,星宿菜与矮桃的茎碳氮比与根碳氮比之间却无显著性差异,但两者均显著高于叶碳氮比,轮叶过路黄与繸瓣珍珠菜的叶、茎与根中的碳氮比均无显著性差异;叶氮含量和叶碳氮比与茎或根的碳含量、氮含量及碳氮比之间均表现为极显著性相关关系。[结论]珍珠菜属植物根茎叶中的碳含量、氮含量与碳氮比具有物种特异性,变化是协同的。[Objective]Eight kinds of Lysimachia plants were used as research objects to analyze the characteristics of ecological and stoichiometric distribution of carbon and nitrogen in the roots,stems and leaves of this genus.[Method]We measured the values of carbon content,nitrogen content,and carbon to nitrogen ratio,and analyzed the differences as well as correlations among roots,stems,and leaves of these species by potted cultural experiment. [Result]At the species level,the carbon contents of each Lysimachia plant in leaves were significantly higher than in stems or roots,and the nitrogen contents of each Lysimachia plant in leaves were also significantly higher than in stems or roots except for L. pseudohenryi and L. klattiana. The C/N ratios in leaves and stems of L. perfoliata,L. christiniae,L. pseudohenryi and L. heterogenea had no significant difference,but significantly lower than in roots. The C/N ratios in stems and roots of each L. fortunei and L. clethroides had no significant difference,but significantly higher than in leaves. The C/N ratios in leaves,stems and roots of L. klattiana and L. glanduliflora had no significant difference. The leaf nitrogen concentration and C/N ratio were closely correlated to stem/root carbon concentration,nitrogen concentration and C/N ratio.[Conclusion]Species-specific and covariation of carbon and nitrogen ecological stoichiometry in leaves,stems and roots of eight species are determined in this study at specific level.

关 键 词：珍珠菜属 碳含量 氮含量 碳氮比 系统发育 

分 类 号：Q949.9[生物学—植物学]