Effects of <i>Bacillus subtilis</i> and <i>Pseudomonas fluorescens</i> Inoculation on Attributes of the Lettuce (<i>Lactuca sativa</i> L.) Soil Rhizosphere Microbial Community: The Role of the Management System
Inoculation with beneficial microbes has been proposed as an effective practice for the improvement of plant growth and soil health. Since soil acts as a physicochemical background for soil microbial communities, we hypothesized that its management will mediate the effects of microbial inoculants on...
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MDPI AG
2020-09-01
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| Series: | Agronomy |
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| Online Access: | https://www.mdpi.com/2073-4395/10/9/1428 |
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| author | Eirini Angelina Efimia M. Papatheodorou Triantafyllia Demirtzoglou Nikolaos Monokrousos |
| author_facet | Eirini Angelina Efimia M. Papatheodorou Triantafyllia Demirtzoglou Nikolaos Monokrousos |
| author_sort | Eirini Angelina |
| collection | DOAJ |
| description | Inoculation with beneficial microbes has been proposed as an effective practice for the improvement of plant growth and soil health. Since soil acts as a physicochemical background for soil microbial communities, we hypothesized that its management will mediate the effects of microbial inoculants on the indigenous soil microbes. We examined the effects of bacterial inoculants [<i>Bacillus subtilis</i> (Ba), <i>Pseudomonas fluorescens</i> (Ps), and both (BaPs)] on the growth of <i>Lactuca sativa</i> cultivated in soils that originated from an organic maize (OS) and a conventional barley (CS) management system. Moreover, the biomass and the community structure of the rhizosphere microbial communities and the soil enzyme activities were recorded. The root weight was higher in CS than OS, while the foliage length was greater in OS than CS treatments. Only in OS pots, inoculants resulted in higher biomasses of bacteria, fungi, and actinomycetes compared to the control with the highest values being recorded in Ps and BaPs treated soils. Furthermore, different inoculants resulted in different communities in terms of structure mainly in OS soils. For soil enzymes, the effect of the management system was more important due to the high organic matter existing in OS soils. We suggest that for microbial inoculation to be effective it should be considered together with the management history of the soil. |
| first_indexed | 2024-03-10T16:12:06Z |
| format | Article |
| id | doaj.art-e6fc848122534219b2e3941aa89eecb4 |
| institution | Directory Open Access Journal |
| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-03-10T16:12:06Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agronomy |
| spelling | doaj.art-e6fc848122534219b2e3941aa89eecb42023-11-20T14:22:27ZengMDPI AGAgronomy2073-43952020-09-01109142810.3390/agronomy10091428Effects of <i>Bacillus subtilis</i> and <i>Pseudomonas fluorescens</i> Inoculation on Attributes of the Lettuce (<i>Lactuca sativa</i> L.) Soil Rhizosphere Microbial Community: The Role of the Management SystemEirini Angelina0Efimia M. Papatheodorou1Triantafyllia Demirtzoglou2Nikolaos Monokrousos3Lab of Molecular Ecology, University Center of International Programmes of Studies, International Hellenic University, 57001 Thessaloniki, GreeceLab of Molecular Ecology, University Center of International Programmes of Studies, International Hellenic University, 57001 Thessaloniki, GreeceDepartment of Research & Development, of HUMOFERT Co., 14452 Athens, GreeceLab of Molecular Ecology, University Center of International Programmes of Studies, International Hellenic University, 57001 Thessaloniki, GreeceInoculation with beneficial microbes has been proposed as an effective practice for the improvement of plant growth and soil health. Since soil acts as a physicochemical background for soil microbial communities, we hypothesized that its management will mediate the effects of microbial inoculants on the indigenous soil microbes. We examined the effects of bacterial inoculants [<i>Bacillus subtilis</i> (Ba), <i>Pseudomonas fluorescens</i> (Ps), and both (BaPs)] on the growth of <i>Lactuca sativa</i> cultivated in soils that originated from an organic maize (OS) and a conventional barley (CS) management system. Moreover, the biomass and the community structure of the rhizosphere microbial communities and the soil enzyme activities were recorded. The root weight was higher in CS than OS, while the foliage length was greater in OS than CS treatments. Only in OS pots, inoculants resulted in higher biomasses of bacteria, fungi, and actinomycetes compared to the control with the highest values being recorded in Ps and BaPs treated soils. Furthermore, different inoculants resulted in different communities in terms of structure mainly in OS soils. For soil enzymes, the effect of the management system was more important due to the high organic matter existing in OS soils. We suggest that for microbial inoculation to be effective it should be considered together with the management history of the soil.https://www.mdpi.com/2073-4395/10/9/1428microbial inoculantssoil enzyme activitiessoil microbes |
| spellingShingle | Eirini Angelina Efimia M. Papatheodorou Triantafyllia Demirtzoglou Nikolaos Monokrousos Effects of <i>Bacillus subtilis</i> and <i>Pseudomonas fluorescens</i> Inoculation on Attributes of the Lettuce (<i>Lactuca sativa</i> L.) Soil Rhizosphere Microbial Community: The Role of the Management System Agronomy microbial inoculants soil enzyme activities soil microbes |
| title | Effects of <i>Bacillus subtilis</i> and <i>Pseudomonas fluorescens</i> Inoculation on Attributes of the Lettuce (<i>Lactuca sativa</i> L.) Soil Rhizosphere Microbial Community: The Role of the Management System |
| title_full | Effects of <i>Bacillus subtilis</i> and <i>Pseudomonas fluorescens</i> Inoculation on Attributes of the Lettuce (<i>Lactuca sativa</i> L.) Soil Rhizosphere Microbial Community: The Role of the Management System |
| title_fullStr | Effects of <i>Bacillus subtilis</i> and <i>Pseudomonas fluorescens</i> Inoculation on Attributes of the Lettuce (<i>Lactuca sativa</i> L.) Soil Rhizosphere Microbial Community: The Role of the Management System |
| title_full_unstemmed | Effects of <i>Bacillus subtilis</i> and <i>Pseudomonas fluorescens</i> Inoculation on Attributes of the Lettuce (<i>Lactuca sativa</i> L.) Soil Rhizosphere Microbial Community: The Role of the Management System |
| title_short | Effects of <i>Bacillus subtilis</i> and <i>Pseudomonas fluorescens</i> Inoculation on Attributes of the Lettuce (<i>Lactuca sativa</i> L.) Soil Rhizosphere Microbial Community: The Role of the Management System |
| title_sort | effects of i bacillus subtilis i and i pseudomonas fluorescens i inoculation on attributes of the lettuce i lactuca sativa i l soil rhizosphere microbial community the role of the management system |
| topic | microbial inoculants soil enzyme activities soil microbes |
| url | https://www.mdpi.com/2073-4395/10/9/1428 |
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