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- Title
盐碱胁迫对染内生菌和不染菌苇状羊茅根系丛枝 菌根真菌群落多样性和组成的影响.
- Authors
唐慧敏; 倪晓臻; 王颖超; 张雅洁; 朱元刚; 刘慧
- Abstract
Epichloë endophytes are widespread symbionts of plants that asymptomatically inhabit aerial host tissues, and not only confer tolerance to biotic and abiotic stresses, but also affect soil microbes. Endophyte-infected (EI) and endophyte-free (EF) Festuca arundinacea are used as experimental materials to investigate the effects of endophyte Epichloë and soil saline-alkali stress on the arbuscular mycorrhizal fungal (AMF) diversity and community composition in roots of tall fescue. A pot experiment under endophyte infection (EI and EF) and saline-alkali stress treatments (0, 200, 400 and 600 mmol/L) was conducted. There are five replicates per treatment. AMF diversity in roots of tall fescue is determined by high throughput sequencing. The diversity of AMF in EF tall fescue roots decreased with the increase of saline-alkali stress treatment level, and the presence of the endophytes alleviated this effect. Under the 200 and 400 mmol/L saline-alkali stress treatments, the endophytes increased the diversity of AMF in tall fescue roots; in addition, the endophytes caused a shift in AMF community composition, reducing the relative abundance of Funneliformis and increasing the relative abundance of Claroideoglomus, Glomus and some unclassified AMF. The results of structural equation model (SEM) showed that the endophytes increased the AMF diversity of tall fescue roots by increasing the concentration of soil total phosphorus under saline-alkali stresses. This study provides reference for selecting the plant-microbial symbionts during ecological restoration in areas with saline-alkali pollution.
- Subjects
NUCLEOTIDE sequencing; TALL fescue; STRUCTURAL equation modeling; RESTORATION ecology; SOIL microbiology; ABIOTIC stress
- Publication
Mycosystema, 2022, Vol 41, Issue 8, p1268
- ISSN
1672-6472
- Publication type
Article
- DOI
10.13346/j.mycosystema.210472