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Comparison of the Structure and Diversity of Root-Associated and Soil Microbial Communities Between Acacia Plantations and Native Tropical Mountain Forests

Deforestation of native tropical forests has occurred extensively over several decades. The plantation of fast-growing trees, such as Acacia spp., is expanding rapidly in tropical regions, which can contribute to conserve the remaining native tropical forests. To better understand belowground biogeo...

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Autores principales: Sawada, Kozue, Watanabe, Shinichi, Nguyen, Ho Lam, Sugihara, Soh, Seki, Mayuko, Kobayashi, Hana, Toyota, Koki, Funakawa, Shinya
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8511777/
https://www.ncbi.nlm.nih.gov/pubmed/34659163
http://dx.doi.org/10.3389/fmicb.2021.735121
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author Sawada, Kozue
Watanabe, Shinichi
Nguyen, Ho Lam
Sugihara, Soh
Seki, Mayuko
Kobayashi, Hana
Toyota, Koki
Funakawa, Shinya
author_facet Sawada, Kozue
Watanabe, Shinichi
Nguyen, Ho Lam
Sugihara, Soh
Seki, Mayuko
Kobayashi, Hana
Toyota, Koki
Funakawa, Shinya
author_sort Sawada, Kozue
collection PubMed
description Deforestation of native tropical forests has occurred extensively over several decades. The plantation of fast-growing trees, such as Acacia spp., is expanding rapidly in tropical regions, which can contribute to conserve the remaining native tropical forests. To better understand belowground biogeochemical cycles and the sustainable productivity of acacia plantations, we assessed the effects of vegetation (acacia plantations vs. native forests) and soil types (Oxisols vs. Ultisols) on soil properties, including the diversity and community structures of bacteria- and fungi-colonizing surface and subsurface roots and soil in the Central Highlands of Vietnam. The results in surface soil showed that pH was significantly higher in acacia than in native for Oxisols but not for Ultisols, while exchangeable Al was significantly lower in acacia than in native for Ultisols but not for Oxisols. Bacterial alpha diversity (especially within phylum Chloroflexi) was higher in acacia than in native only for Oxisols but not for Ultisols, which was the same statistical result as soil pH but not exchangeable Al. These results suggest that soil pH, but not exchangeable Al, can be the critical factor to determine bacterial diversity. Acacia tree roots supported greater proportions of copiotrophic bacteria, which may support lower contents of soil inorganic N, compared with native tree roots for both Oxisols and Ultisols. Acacia tree roots also supported greater proportions of plant pathogenic Mycoleptodiscus sp. but appeared to reduce the abundances and diversity of beneficial ECM fungi compared with native tree roots regardless of soil types. Such changes in fungal community structures may threaten the sustainable productivity of acacia plantations in the future.
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spelling pubmed-85117772021-10-14 Comparison of the Structure and Diversity of Root-Associated and Soil Microbial Communities Between Acacia Plantations and Native Tropical Mountain Forests Sawada, Kozue Watanabe, Shinichi Nguyen, Ho Lam Sugihara, Soh Seki, Mayuko Kobayashi, Hana Toyota, Koki Funakawa, Shinya Front Microbiol Microbiology Deforestation of native tropical forests has occurred extensively over several decades. The plantation of fast-growing trees, such as Acacia spp., is expanding rapidly in tropical regions, which can contribute to conserve the remaining native tropical forests. To better understand belowground biogeochemical cycles and the sustainable productivity of acacia plantations, we assessed the effects of vegetation (acacia plantations vs. native forests) and soil types (Oxisols vs. Ultisols) on soil properties, including the diversity and community structures of bacteria- and fungi-colonizing surface and subsurface roots and soil in the Central Highlands of Vietnam. The results in surface soil showed that pH was significantly higher in acacia than in native for Oxisols but not for Ultisols, while exchangeable Al was significantly lower in acacia than in native for Ultisols but not for Oxisols. Bacterial alpha diversity (especially within phylum Chloroflexi) was higher in acacia than in native only for Oxisols but not for Ultisols, which was the same statistical result as soil pH but not exchangeable Al. These results suggest that soil pH, but not exchangeable Al, can be the critical factor to determine bacterial diversity. Acacia tree roots supported greater proportions of copiotrophic bacteria, which may support lower contents of soil inorganic N, compared with native tree roots for both Oxisols and Ultisols. Acacia tree roots also supported greater proportions of plant pathogenic Mycoleptodiscus sp. but appeared to reduce the abundances and diversity of beneficial ECM fungi compared with native tree roots regardless of soil types. Such changes in fungal community structures may threaten the sustainable productivity of acacia plantations in the future. Frontiers Media S.A. 2021-09-29 /pmc/articles/PMC8511777/ /pubmed/34659163 http://dx.doi.org/10.3389/fmicb.2021.735121 Text en Copyright © 2021 Sawada, Watanabe, Nguyen, Sugihara, Seki, Kobayashi, Toyota and Funakawa. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Microbiology
Sawada, Kozue
Watanabe, Shinichi
Nguyen, Ho Lam
Sugihara, Soh
Seki, Mayuko
Kobayashi, Hana
Toyota, Koki
Funakawa, Shinya
Comparison of the Structure and Diversity of Root-Associated and Soil Microbial Communities Between Acacia Plantations and Native Tropical Mountain Forests
title Comparison of the Structure and Diversity of Root-Associated and Soil Microbial Communities Between Acacia Plantations and Native Tropical Mountain Forests
title_full Comparison of the Structure and Diversity of Root-Associated and Soil Microbial Communities Between Acacia Plantations and Native Tropical Mountain Forests
title_fullStr Comparison of the Structure and Diversity of Root-Associated and Soil Microbial Communities Between Acacia Plantations and Native Tropical Mountain Forests
title_full_unstemmed Comparison of the Structure and Diversity of Root-Associated and Soil Microbial Communities Between Acacia Plantations and Native Tropical Mountain Forests
title_short Comparison of the Structure and Diversity of Root-Associated and Soil Microbial Communities Between Acacia Plantations and Native Tropical Mountain Forests
title_sort comparison of the structure and diversity of root-associated and soil microbial communities between acacia plantations and native tropical mountain forests
topic Microbiology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8511777/
https://www.ncbi.nlm.nih.gov/pubmed/34659163
http://dx.doi.org/10.3389/fmicb.2021.735121
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