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林业科学 ›› 2020, Vol. 56 ›› Issue (9): 87-96.doi: 10.11707/j.1001-7488.20200910

• 论文与研究报告 • 上一篇    下一篇

科尔沁沙地樟子松根内真菌群落结构和功能群特征

赵珮杉1,2,郭米山1,2,高广磊1,2,*,丁国栋1,2,张英1   

  1. 1. 北京林业大学水土保持学院 水土保持国家林业和草原局重点实验室 北京 100083
    2. 宁夏盐池毛乌素沙地生态系统国家定位观测研究站 盐池 751500
  • 收稿日期:2019-05-21 出版日期:2020-09-25 发布日期:2020-10-15
  • 通讯作者: 高广磊
  • 基金资助:
    国家重点研发计划项目(2018YFC0507102);国家自然科学基金项目(31600583);中央高校基本科研业务费专项资金项目(2017PT03)

Characteristics of Community Structure and Functional Group of Fungi in Roots of Pinus sylvestris var. mongolica in the Horqin Sandy Land

Peishan Zhao1,2,Mishan Guo1,2,Guanglei Gao1,2,*,Guodong Ding1,2,Ying Zhang1   

  1. 1. Key Laboratory of National Forestry and Grassland Administration on Soil and Water Conservation School of Soil and Water Conservation, Beijing Forestry University Beijing 100083
    2. Yanchi Ecology Research Station of the Mu Us Desert Yanchi 751500
  • Received:2019-05-21 Online:2020-09-25 Published:2020-10-15
  • Contact: Guanglei Gao

摘要:

目的: 揭示科尔沁沙地樟子松根内真菌群落结构和功能群特征,为樟子松人工林经营管理提供依据。方法: 以科尔沁沙地不同林龄(26、33和43年)樟子松人工林为研究对象,利用Illumina MiSeq高通量测序和FUNGuild平台比较分析樟子松根内真菌群落结构和功能群,并探究土壤理化性质对根内真菌多样性和功能群结构的影响。结果: 1)科尔沁沙地樟子松根尖样品共获得832个OTUs,不同林龄沙地樟子松根内真菌多样性无显著差异。2)樟子松根内真菌隶属于5门16纲54目84科165属,且子囊菌门和担子菌门占绝对优势。樟子松根内真菌优势属包括鞘孢属、肉座菌属和Phialocephala。随着林龄的增加,优势属比例下降,常见属比例增加,稀有属比例则相对稳定。3)在樟子松根系中,病理营养型真菌比例随林龄增加而降低,共生营养型真菌比例则随林龄增加而急剧增加,主要表现为乳菇属、糙缘腺革菌属和须腹菌属等外生菌根真菌相对丰度增加。4)土壤理化性质和根内真菌多样性无显著相关性,不同真菌营养型中仅共生营养型真菌相对丰度与土壤含水量显著负相关。结论: 科尔沁沙地樟子松根内真菌物种组成丰富,功能群类型多样,不同林龄根内真菌功能群结构波动主要为病理营养型和共生营养型,土壤理化性质对根内真菌物种多样性的影响不显著。

关键词: 樟子松, 腐生真菌, 病原真菌, 外生菌根真菌, 林龄, 科尔沁沙地

Abstract:

Objective: In this study,the fungal community structure and functional group in the roots of Pinus sylvestris var. mongolica were characterized to provide fundamental basis for forest management in the Horqin Sandy Land. Method: P. sylvestris var. mongolica plantations with different ages (26,33 and 43 a) in the Horqin Sandy Land were targeted. The fungal communities and functional groups in the roots of P. sylvestris var. mongolica were identified by Illumina high-throughput sequencing and FUNGuild platform,respectively. And the effects of soil properties on fungal diversities and functional group were also investigated. Result: 1) A total of 832 OTUs of fungi were obtained from root tip samples of P. sylvestris var. mongolica in Horqin sandy land. There were no significant differences in Simpson,Shannon and Pielou index among the different ages of plantations. 2) The root fungi of P. sylvestris var. mongolica in sandy land belonged to 182 genera,84 families,54 orders,16 classes and 5 phyla. Ascomycota and Basidiomycota were dominant in all age groups. The dominant genera were Chalara,Hypocrea and Phialocephala. With the increase of stand age,the proportion of dominant genera decreased,while the common genera increased. At the same time,rare genera remained at a stable level. 3) The proportion of pathogenic fungi decreased with age increasing,while the symbiotrophic fungi increased sharply which the mainly included ectomycorrhizal fungi (e.g.,Lactarius,Amphinema and Rhizopogonwere). 4) There was no significant correlation between diversity and soil properties,and relative abundance of symbiotroph had a significant negative correlation with soil water content. Conclusion: The community composition of fungi in the roots of P. sylvestris var. mongolica is abundant,the types of functional groups are diverse. The fluctuation of functional group structure in different age group is mainly affected by pathogenic and symbiotic fungi. No significant correlation is found between fungal diversity and soil properties.

Key words: Pinus sylvestris var. mongolica, saprotrophic fungi, pathogenic fungi, ectomycorrhizal fungi, stand age, Horqin Sandy Land

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