Salt-tolerant endophytic bacterium Enterobacter ludwigii B30 enhance bermudagrass growth under salt stress by modulating plant physiology and changing rhizosphere and root bacterial community
Osmotic and ionic induced salt stress suppresses plant growth. In a previous study, Enterobacter ludwigii B30, isolated from Paspalum vaginatum, improved seed germination, root length, and seedling length of bermudagrass (Cynodon dactylon) under salt stress. In this study, E. ludwigii B30 applicatio...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2022-08-01
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| Series: | Frontiers in Plant Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fpls.2022.959427/full |
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| author | Hongjian Wei Hongjian Wei Wenyuan He Ziji Li Ziji Li Liangfa Ge Liangfa Ge Juming Zhang Juming Zhang Tianzeng Liu Tianzeng Liu |
| author_facet | Hongjian Wei Hongjian Wei Wenyuan He Ziji Li Ziji Li Liangfa Ge Liangfa Ge Juming Zhang Juming Zhang Tianzeng Liu Tianzeng Liu |
| author_sort | Hongjian Wei |
| collection | DOAJ |
| description | Osmotic and ionic induced salt stress suppresses plant growth. In a previous study, Enterobacter ludwigii B30, isolated from Paspalum vaginatum, improved seed germination, root length, and seedling length of bermudagrass (Cynodon dactylon) under salt stress. In this study, E. ludwigii B30 application improved fresh weight and dry weight, carotenoid and chlorophyll levels, catalase and superoxide dismutase activities, indole acetic acid content and K+ concentration. Without E. ludwigii B30 treatment, bermudagrass under salt stress decreased malondialdehyde and proline content, Y(NO) and Y(NPQ), Na+ concentration, 1-aminocyclopropane-1-carboxylate, and abscisic acid content. After E. ludwigii B30 inoculation, bacterial community richness and diversity in the rhizosphere increased compared with the rhizosphere adjacent to roots under salt stress. Turf quality and carotenoid content were positively correlated with the incidence of the phyla Chloroflexi and Fibrobacteres in rhizosphere soil, and indole acetic acid (IAA) level was positively correlated with the phyla Actinobacteria and Chloroflexi in the roots. Our results suggest that E. ludwigii B30 can improve the ability of bermudagrass to accumulate biomass, adjust osmosis, improve photosynthetic efficiency and selectively absorb ions for reducing salt stress-induced injury, while changing the bacterial community structure of the rhizosphere and bermudagrass roots. They also provide a foundation for understanding how the bermudagrass rhizosphere and root microorganisms respond to endophyte inoculation. |
| first_indexed | 2024-12-10T22:04:12Z |
| format | Article |
| id | doaj.art-7585981389d44ab980a1bce39ea8e391 |
| institution | Directory Open Access Journal |
| issn | 1664-462X |
| language | English |
| last_indexed | 2024-12-10T22:04:12Z |
| publishDate | 2022-08-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Plant Science |
| spelling | doaj.art-7585981389d44ab980a1bce39ea8e3912022-12-22T01:31:49ZengFrontiers Media S.A.Frontiers in Plant Science1664-462X2022-08-011310.3389/fpls.2022.959427959427Salt-tolerant endophytic bacterium Enterobacter ludwigii B30 enhance bermudagrass growth under salt stress by modulating plant physiology and changing rhizosphere and root bacterial communityHongjian Wei0Hongjian Wei1Wenyuan He2Ziji Li3Ziji Li4Liangfa Ge5Liangfa Ge6Juming Zhang7Juming Zhang8Tianzeng Liu9Tianzeng Liu10College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, ChinaGuangdong Engineering Research Center for Grassland Science, South China Agricultural University, Guangzhou, ChinaCollege of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, ChinaCollege of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, ChinaGuangdong Engineering Research Center for Grassland Science, South China Agricultural University, Guangzhou, ChinaCollege of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, ChinaGuangdong Engineering Research Center for Grassland Science, South China Agricultural University, Guangzhou, ChinaCollege of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, ChinaGuangdong Engineering Research Center for Grassland Science, South China Agricultural University, Guangzhou, ChinaCollege of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, ChinaGuangdong Engineering Research Center for Grassland Science, South China Agricultural University, Guangzhou, ChinaOsmotic and ionic induced salt stress suppresses plant growth. In a previous study, Enterobacter ludwigii B30, isolated from Paspalum vaginatum, improved seed germination, root length, and seedling length of bermudagrass (Cynodon dactylon) under salt stress. In this study, E. ludwigii B30 application improved fresh weight and dry weight, carotenoid and chlorophyll levels, catalase and superoxide dismutase activities, indole acetic acid content and K+ concentration. Without E. ludwigii B30 treatment, bermudagrass under salt stress decreased malondialdehyde and proline content, Y(NO) and Y(NPQ), Na+ concentration, 1-aminocyclopropane-1-carboxylate, and abscisic acid content. After E. ludwigii B30 inoculation, bacterial community richness and diversity in the rhizosphere increased compared with the rhizosphere adjacent to roots under salt stress. Turf quality and carotenoid content were positively correlated with the incidence of the phyla Chloroflexi and Fibrobacteres in rhizosphere soil, and indole acetic acid (IAA) level was positively correlated with the phyla Actinobacteria and Chloroflexi in the roots. Our results suggest that E. ludwigii B30 can improve the ability of bermudagrass to accumulate biomass, adjust osmosis, improve photosynthetic efficiency and selectively absorb ions for reducing salt stress-induced injury, while changing the bacterial community structure of the rhizosphere and bermudagrass roots. They also provide a foundation for understanding how the bermudagrass rhizosphere and root microorganisms respond to endophyte inoculation.https://www.frontiersin.org/articles/10.3389/fpls.2022.959427/fullsalt stressendophytegrowth-promotingbermudagrassbacterial community |
| spellingShingle | Hongjian Wei Hongjian Wei Wenyuan He Ziji Li Ziji Li Liangfa Ge Liangfa Ge Juming Zhang Juming Zhang Tianzeng Liu Tianzeng Liu Salt-tolerant endophytic bacterium Enterobacter ludwigii B30 enhance bermudagrass growth under salt stress by modulating plant physiology and changing rhizosphere and root bacterial community Frontiers in Plant Science salt stress endophyte growth-promoting bermudagrass bacterial community |
| title | Salt-tolerant endophytic bacterium Enterobacter ludwigii B30 enhance bermudagrass growth under salt stress by modulating plant physiology and changing rhizosphere and root bacterial community |
| title_full | Salt-tolerant endophytic bacterium Enterobacter ludwigii B30 enhance bermudagrass growth under salt stress by modulating plant physiology and changing rhizosphere and root bacterial community |
| title_fullStr | Salt-tolerant endophytic bacterium Enterobacter ludwigii B30 enhance bermudagrass growth under salt stress by modulating plant physiology and changing rhizosphere and root bacterial community |
| title_full_unstemmed | Salt-tolerant endophytic bacterium Enterobacter ludwigii B30 enhance bermudagrass growth under salt stress by modulating plant physiology and changing rhizosphere and root bacterial community |
| title_short | Salt-tolerant endophytic bacterium Enterobacter ludwigii B30 enhance bermudagrass growth under salt stress by modulating plant physiology and changing rhizosphere and root bacterial community |
| title_sort | salt tolerant endophytic bacterium enterobacter ludwigii b30 enhance bermudagrass growth under salt stress by modulating plant physiology and changing rhizosphere and root bacterial community |
| topic | salt stress endophyte growth-promoting bermudagrass bacterial community |
| url | https://www.frontiersin.org/articles/10.3389/fpls.2022.959427/full |
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