Characteristics and Influencing Factors of Soil Arbuscular Mycorrhizal Fungi Community Under Different Environmental Conditions in Poyang Lake Wetland

WANG Jinping; YUAN Jihong; REN Qiong; ZHOU Liyin; MIAO Lujun; WAN Fang; XU Shengding; WAN Songxian

doi:10.13870/j.cnki.stbcxb.2023.05.030

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Characteristics and Influencing Factors of Soil Arbuscular Mycorrhizal Fungi Community Under Different Environmental Conditions in Poyang Lake Wetland

更新时间：2025-03-12

- Characteristics and Influencing Factors of Soil Arbuscular Mycorrhizal Fungi Community Under Different Environmental Conditions in Poyang Lake Wetland
- Vol. 37, Issue 5, Pages: 252-258(2023)
- 作者机构：
  
  1. 南昌工程学院,南昌,330099
  2. 江西省林业科学院,南昌,330032
  3. 南昌市城市规划设计研究总院,南昌,330013
  4. 江西鄱阳湖南矶湿地国家级自然保护区管理局,南昌,330038
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2023.05.030
  CLC： X172
- Published：2023
- 稿件说明：
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WANG Jinping, YUAN Jihong, REN Qiong, et al. Characteristics and Influencing Factors of Soil Arbuscular Mycorrhizal Fungi Community Under Different Environmental Conditions in Poyang Lake Wetland[J]. 2023, 37(5): 252-258.
DOI：

WANG Jinping, YUAN Jihong, REN Qiong, et al. Characteristics and Influencing Factors of Soil Arbuscular Mycorrhizal Fungi Community Under Different Environmental Conditions in Poyang Lake Wetland[J]. 2023, 37(5): 252-258. DOI： 10.13870/j.cnki.stbcxb.2023.05.030.

摘要

丛枝菌根(AM)真菌可以与湿地植物共生

并在湿地生态系统的修复与维护过程中具有重要作用。然而

不同环境条件下湿地土壤AM真菌群落分布特征及其影响因素仍然有待明晰。选择鄱阳湖湿地不同水位条件(高水位和低水位)2种典型植物群落(南荻和水蓼)为研究对象

运用高通量测序技术探究水位和植被类型对鄱阳湖湿地土壤AM真菌群落结构和多样性的影响

比较不同环境条件下AM真菌群落结构和多样性差异

分析其与土壤理化性质的关系。结果表明

AM真菌OTU数为21~38

水位和植被类型影响鄱阳湖湿地土壤AM真菌OTU数

高水位下AM真菌OTU数高于低水位

水蓼群落高于南荻群落。被鉴别出的菌属为Glomus、Claroideoglomus和Paraglomus

其中

Glomus是优势属

占比85%以上

其相对丰度在高水位下显著高于低水位(p<0.05)

南荻群落高于水蓼群落。AM真菌多样性指数(Simpson和Shannon指数)受水位和植被类型以及二者交互影响(p<0.01)

低水位下不同群落之间的AM真菌多样性指数无显著差异

而高水位下水蓼群落AM真菌多样性指数显著高于南荻群落(p<0.05)。水位对AM真菌群落结构的影响高于植被类型

只有在低水位下植被类型才显著影响AM真菌群落结构。相关性分析显示

AM真菌多样性指数(Shannon和Simpson指数)与土壤因子无显著关系

低水位下土壤含水量与Glomus和OTU数量呈显著负相关(p<0.05)

而高水位下pH与优势属Glomus数量呈显著正相关(p<0.05)。因此

湿地生态系统中土壤含水量对Glomus的影响存在阈值效应。研究结果能为退化湿地生态系统修复提供科学指导。

Abstract

Arbuscular mycorrhizal (AM) fungi can coexist with wetland plants and play an important role in the restoration and maintenance of wetland ecosystem. However

the distribution and influencing factors of soil AM fungal community under different environmental conditions in wetland ecosystem still need to be clarified. Therefore

this study used high-throughput sequencing technology to explore the effects of water level and vegetation type on the community structure and diversity of soil AM fungi in Poyang Lake wetland. Two typical plant communities (Triarrhena lutarioriparia and Persicaria hydropiper) under different water levels (high and low water level) were chosen to compare the difference of the community structure and diversity of AM fungi among different environmental conditions. The relationship between AM fungal community and soil physicochemical properties was analyzed. The results showed that the OTU number of AM fungi ranged from 21 to 38. Both water level and vegetation type affected the OTU number of AM fungi in Poyang Lake wetland. The OTU number of AM fungi was higher under high water level than that under low water level

and it was higher in P. hydropiper community than that in T. lutarioriparia community. The identified genera of AM fungi were Glomus

Claroidoglomus and Paraglomus. Among them

Glomus was the dominant genus

accounting for more than 85%. And the relative abundance of Glomus was significantly higher under high water level

compared with low water level

while it was significantly higher in T. lutarioriparia community

compared with P. hydropiper community (p<0.05). The AM fungal diversity indices (Simpson and Shannon index) were affected by water level

vegetation type and their interaction (p<0.01). Under low water level

there was no significant difference in AM fungal diversity indices between different communities

but under high water level

the AM fungal diversity indices in P. hydropiper community was significantly higher than that in T. lutarioriparia community (p<0.05). Water level had a higher effect on community structure of soil AM fungi than that of vegetation type

and vegetation type significantly affected AM fungal community structure only at low water level. Correlation analysis showed that there was no significant relationship between AM fungal diversity indices (Shannon and Simpson index) and soil factors. Dominant genera Glomus and OTU number were significantly and negatively correlated with soil water content at low water level (p<0.05)

while Glomus was significantly and positively correlated with soil pH at high water level (p<0.05). Hence

there was a threshold effect of soil water content on Glomus in wetland ecosystem. The results of the present study could provide scientific guidance for the restoration of degraded wetland ecosystem.

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