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丛枝菌根真菌对元宝枫生长及其根系形态的影响
李 晴1, 段文艳1, 李 鑫,等1
西北农林科技大学 林学院
摘要:
【目的】阐明丛枝菌根(arbuscular mycorrhizal,AM)真菌对元宝枫生长状况及根系形态特性的影响,探讨元宝枫根系形态与其生长发育的关系。【方法】在元宝枫幼苗生长基质中接种摩西斗管囊霉(Funneliformis mosseae)和根内根孢囊霉(Rhizophagus intraradices)2种AM真菌,以不接种AM真菌为对照,通过盆栽试验,培养90 d后,测定元宝枫的生长状况、根系活力及根系形态指标,利用单因素方差分析和多重比较方法,分析接菌与不接菌处理之间的差异,采用envfit ()函数、冗余度分析和变差分解分析元宝枫生长状况与其他指标间的关系。【结果】①接种2种AM真菌后,元宝枫株高、地径、茎干质量和根系活力较对照显著提高,根冠比下降。根内根孢囊霉对元宝枫的促生作用比摩西斗管囊霉显著。②与对照相比,接种2种AM真菌后,元宝枫根表面积和根体积显著增大,粗根根长占总根长的比例增加,细根根长占总根长的比例显著降低。根内根孢囊霉对元宝枫根系形态的影响比摩西斗管囊霉显著。③元宝枫生长状况与其根系活力和根系形态密切相关。【结论】接种AM真菌有助于增强元宝枫的根系活力,改善其根系形态,促使其汲取更多养分,进而提高其生物量。
关键词:  元宝枫  丛枝菌根真菌  根系活力  根系形态
DOI:
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基金项目:陕西省自然科学基金项目(2021JM-094);陕西省技术创新专项(2020QFY10-01)
Effect of arbuscular mycorrhizal fungi on growth and root morphology of Acer truncatum
LI Qing,DUAN Wenyan,LI Xin,et al
Abstract:
【Objective】This study elucidated the effects of AM fungi on growth and root morphological characteristics of Acer truncatum to explore relationships between root morphology of Acer truncatum and growth and development.【Method】Two kinds of AM fungi,Funneliformis mosseae and Rhizophagus intraradices,were inoculated into the growth matrix of Acer truncatum seedlings,and non-inoculation was used as the control.After 90 days,the growth,root activity and root morphology of Acer truncatum were determined.The differences between inoculation and non-inoculation treatments were analyzed by one-way analysis of variance and multiple comparison methods.The relationship between the growth of Acer truncatum and other indexes was analyzed by envfit () function,redundancy analysis and variation partitioning analysis.【Result】① After inoculation with AM fungi,plant height,ground diameter,stem weight and root activity of Acer truncatum were significantly increased,while root-shoot ratio was decreased.The promoting effect of Rhizophagus intraradices on Acer truncatum was more significant than that of Funneliformis mosseae.② After inoculation with AM fungi,root surface area and root volume of Acer truncatum increased significantly,the proportion of coarse roots increased significantly,while the proportion of fine roots decreased significantly.The effect of Rhizophagus intraradices on root morphology of Acer truncatum was more significant than that of Funneliformis mosseae.③ The growth of Acer truncatum was closely related to root activity and root morphology.【Conclusion】Inoculation of AM fungi enhanced root activity of Acer truncatum,improved its root morphology,promoted nutrient absorption,and increased its biomass.
Key words:  Acer truncatum  arbuscular mycorrhizal fungi  root activity  root morphology

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