Effect of AM Fungi Inoculation on Litter Bacterial Community Characteristics under Heavy Metal Stress
Because microorganisms are the primary driving force behind litter decomposition, they play an important role in maintaining ecosystem material and chemical cycling. Arbuscular mycorrhizal (AM) fungi can improve host plant tolerance to various environmental stressors, making their application in min...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-01-01
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| Series: | Microorganisms |
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| Online Access: | https://www.mdpi.com/2076-2607/10/2/206 |
| _version_ | 1797477910316056576 |
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| author | Tong Jia Yu Wang Xiaoxia Liang Tingyan Guo |
| author_facet | Tong Jia Yu Wang Xiaoxia Liang Tingyan Guo |
| author_sort | Tong Jia |
| collection | DOAJ |
| description | Because microorganisms are the primary driving force behind litter decomposition, they play an important role in maintaining ecosystem material and chemical cycling. Arbuscular mycorrhizal (AM) fungi can improve host plant tolerance to various environmental stressors, making their application in mining area remediation important. In this study, litter from the dominant plant species (<i>Imperata cylindrica</i>) in a copper tailings mining area was selected as the experimental material. We conducted a greenhouse-based heavy metal stress experiment to investigate how AM fungi affect litter microbial community characteristics and key ecological factors. Results showed that AM fungi species, heavy metal treatments, and their combined interaction had significant impacts on litter pH. Additionally, enzyme activities in litter were significantly affected by interactions between AM fungi species and heavy metal contaminates. <i>Ralstonia</i> was significantly positively correlated to lead (Pb) content, indicating that <i>Ralstonia</i> had a certain tolerance to Pb pollution. Sucrase and urease activity were increased when plants were inoculated with <i>Rhizophagus irregularis</i> under Pb stress. Furthermore, <i>Microbacterium</i>, <i>Brevundimonas</i>, and <i>Pseudonocardia</i> all may play important roles in litter decomposition, while a certain tolerance was observed in <i>Kushneria</i> and <i>Roseivivax</i> to heavy metal pollution when plants were inoculated with <i>Glomus mosseae</i>. Results showed that AM fungi affected litter bacterial community structure and function by influencing plant litter properties. By exploring interactions between AM fungi and bacterial communities in plant litter under heavy metal stress, we will better understand associative processes that promote the cycling of soil organic matter and nutrients contaminated by non-ferrous metal tailings. |
| first_indexed | 2024-03-09T21:24:28Z |
| format | Article |
| id | doaj.art-37c7fd3948a54b46b547d82644fae97b |
| institution | Directory Open Access Journal |
| issn | 2076-2607 |
| language | English |
| last_indexed | 2024-03-09T21:24:28Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Microorganisms |
| spelling | doaj.art-37c7fd3948a54b46b547d82644fae97b2023-11-23T21:12:31ZengMDPI AGMicroorganisms2076-26072022-01-0110220610.3390/microorganisms10020206Effect of AM Fungi Inoculation on Litter Bacterial Community Characteristics under Heavy Metal StressTong Jia0Yu Wang1Xiaoxia Liang2Tingyan Guo3Institute of Loess Plateau, Shanxi University, Taiyuan 030006, ChinaInstitute of Loess Plateau, Shanxi University, Taiyuan 030006, ChinaInstitute of Loess Plateau, Shanxi University, Taiyuan 030006, ChinaInstitute of Loess Plateau, Shanxi University, Taiyuan 030006, ChinaBecause microorganisms are the primary driving force behind litter decomposition, they play an important role in maintaining ecosystem material and chemical cycling. Arbuscular mycorrhizal (AM) fungi can improve host plant tolerance to various environmental stressors, making their application in mining area remediation important. In this study, litter from the dominant plant species (<i>Imperata cylindrica</i>) in a copper tailings mining area was selected as the experimental material. We conducted a greenhouse-based heavy metal stress experiment to investigate how AM fungi affect litter microbial community characteristics and key ecological factors. Results showed that AM fungi species, heavy metal treatments, and their combined interaction had significant impacts on litter pH. Additionally, enzyme activities in litter were significantly affected by interactions between AM fungi species and heavy metal contaminates. <i>Ralstonia</i> was significantly positively correlated to lead (Pb) content, indicating that <i>Ralstonia</i> had a certain tolerance to Pb pollution. Sucrase and urease activity were increased when plants were inoculated with <i>Rhizophagus irregularis</i> under Pb stress. Furthermore, <i>Microbacterium</i>, <i>Brevundimonas</i>, and <i>Pseudonocardia</i> all may play important roles in litter decomposition, while a certain tolerance was observed in <i>Kushneria</i> and <i>Roseivivax</i> to heavy metal pollution when plants were inoculated with <i>Glomus mosseae</i>. Results showed that AM fungi affected litter bacterial community structure and function by influencing plant litter properties. By exploring interactions between AM fungi and bacterial communities in plant litter under heavy metal stress, we will better understand associative processes that promote the cycling of soil organic matter and nutrients contaminated by non-ferrous metal tailings.https://www.mdpi.com/2076-2607/10/2/206arbuscular mycorrhizal fungilitterbacterial communityheavy metal stress<i>Imperata cylindrica</i> |
| spellingShingle | Tong Jia Yu Wang Xiaoxia Liang Tingyan Guo Effect of AM Fungi Inoculation on Litter Bacterial Community Characteristics under Heavy Metal Stress Microorganisms arbuscular mycorrhizal fungi litter bacterial community heavy metal stress <i>Imperata cylindrica</i> |
| title | Effect of AM Fungi Inoculation on Litter Bacterial Community Characteristics under Heavy Metal Stress |
| title_full | Effect of AM Fungi Inoculation on Litter Bacterial Community Characteristics under Heavy Metal Stress |
| title_fullStr | Effect of AM Fungi Inoculation on Litter Bacterial Community Characteristics under Heavy Metal Stress |
| title_full_unstemmed | Effect of AM Fungi Inoculation on Litter Bacterial Community Characteristics under Heavy Metal Stress |
| title_short | Effect of AM Fungi Inoculation on Litter Bacterial Community Characteristics under Heavy Metal Stress |
| title_sort | effect of am fungi inoculation on litter bacterial community characteristics under heavy metal stress |
| topic | arbuscular mycorrhizal fungi litter bacterial community heavy metal stress <i>Imperata cylindrica</i> |
| url | https://www.mdpi.com/2076-2607/10/2/206 |
| work_keys_str_mv | AT tongjia effectofamfungiinoculationonlitterbacterialcommunitycharacteristicsunderheavymetalstress AT yuwang effectofamfungiinoculationonlitterbacterialcommunitycharacteristicsunderheavymetalstress AT xiaoxialiang effectofamfungiinoculationonlitterbacterialcommunitycharacteristicsunderheavymetalstress AT tingyanguo effectofamfungiinoculationonlitterbacterialcommunitycharacteristicsunderheavymetalstress |