Effects of Compost Amendment on Glycophyte and Halophyte Crops Grown on Saline Soils: Isolation and Characterization of Rhizobacteria with Plant Growth Promoting Features and High Salt Resistance
Soil salinization and desertification due to climate change are the most relevant challenges for the agriculture of the 21st century. Soil compost amendment and plant growth promoting rhizobacteria (PGP-R) are valuable tools to mitigate salinization and desertification impacts on agricultural soils....
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| Format: | Article |
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MDPI AG
2021-02-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/5/2125 |
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| author | Stefano Castiglione Gianmaria Oliva Giovanni Vigliotta Giorgia Novello Elisa Gamalero Guido Lingua Angela Cicatelli Francesco Guarino |
| author_facet | Stefano Castiglione Gianmaria Oliva Giovanni Vigliotta Giorgia Novello Elisa Gamalero Guido Lingua Angela Cicatelli Francesco Guarino |
| author_sort | Stefano Castiglione |
| collection | DOAJ |
| description | Soil salinization and desertification due to climate change are the most relevant challenges for the agriculture of the 21st century. Soil compost amendment and plant growth promoting rhizobacteria (PGP-R) are valuable tools to mitigate salinization and desertification impacts on agricultural soils. Selection of novel halo/thermo-tolerant bacteria from the rhizosphere of glicophytes and halophytes, grown on soil compost amended and watered with 150/300 mM NaCl, was the main objective of our study. Beneficial effects on the biomass, well-being and resilience, exerted on the assayed crops (maize, tomato, sunflower and quinoa), were clearly observable when soils were amended with 20% compost despite the very high soil electric conductivity (EC). Soil compost amendment not only was able to increase crop growth and biomass, but also their resilience to the stress caused by very high soil EC (up to 20 dS m<sup>−1</sup>). Moreover, compost amendment has proved itself a valuable source of highly halo-(4.0 M NaCl)/thermo tolerant rhizobacteria (55 °C), showing typical PGP features. Among the 13 rhizobacterial isolates, molecularly and biochemically characterized, two bacterial strains showed several biochemical PGP features. The use of compost is growing all around the world reducing considerably for farmers soil fertilization costs. In fact, only in Italy its utilization has ensured, in the last years, a saving of 650 million euro for the farmers, without taking into account the environment and human health benefits. Furthermore, the isolation of halo/thermo-tolerant PGPR strains and their use will allow the recovery and cultivation of hundreds of thousands of hectares of saline and arid soils now unproductive, making agriculture more respectful of agro-ecosystems also in view of upcoming climate change. |
| first_indexed | 2024-03-09T06:16:15Z |
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| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T06:16:15Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-030dd3b8e37f477c853002096713a3ec2023-12-03T11:52:11ZengMDPI AGApplied Sciences2076-34172021-02-01115212510.3390/app11052125Effects of Compost Amendment on Glycophyte and Halophyte Crops Grown on Saline Soils: Isolation and Characterization of Rhizobacteria with Plant Growth Promoting Features and High Salt ResistanceStefano Castiglione0Gianmaria Oliva1Giovanni Vigliotta2Giorgia Novello3Elisa Gamalero4Guido Lingua5Angela Cicatelli6Francesco Guarino7Department of Chemistry and Biology “A. Zambelli”, University of Salerno, 84084 Fisciano, SA, ItalyDepartment of Chemistry and Biology “A. Zambelli”, University of Salerno, 84084 Fisciano, SA, ItalyDepartment of Chemistry and Biology “A. Zambelli”, University of Salerno, 84084 Fisciano, SA, ItalyDepartment of Scienze e Innovazione Tecnologica, University of Piemonte Orientale “Amedeo Avogadro”, Viale Teresa Michel 11, 15121 Alessandria, AL, ItalyDepartment of Scienze e Innovazione Tecnologica, University of Piemonte Orientale “Amedeo Avogadro”, Viale Teresa Michel 11, 15121 Alessandria, AL, ItalyDepartment of Scienze e Innovazione Tecnologica, University of Piemonte Orientale “Amedeo Avogadro”, Viale Teresa Michel 11, 15121 Alessandria, AL, ItalyDepartment of Chemistry and Biology “A. Zambelli”, University of Salerno, 84084 Fisciano, SA, ItalyDepartment of Chemistry and Biology “A. Zambelli”, University of Salerno, 84084 Fisciano, SA, ItalySoil salinization and desertification due to climate change are the most relevant challenges for the agriculture of the 21st century. Soil compost amendment and plant growth promoting rhizobacteria (PGP-R) are valuable tools to mitigate salinization and desertification impacts on agricultural soils. Selection of novel halo/thermo-tolerant bacteria from the rhizosphere of glicophytes and halophytes, grown on soil compost amended and watered with 150/300 mM NaCl, was the main objective of our study. Beneficial effects on the biomass, well-being and resilience, exerted on the assayed crops (maize, tomato, sunflower and quinoa), were clearly observable when soils were amended with 20% compost despite the very high soil electric conductivity (EC). Soil compost amendment not only was able to increase crop growth and biomass, but also their resilience to the stress caused by very high soil EC (up to 20 dS m<sup>−1</sup>). Moreover, compost amendment has proved itself a valuable source of highly halo-(4.0 M NaCl)/thermo tolerant rhizobacteria (55 °C), showing typical PGP features. Among the 13 rhizobacterial isolates, molecularly and biochemically characterized, two bacterial strains showed several biochemical PGP features. The use of compost is growing all around the world reducing considerably for farmers soil fertilization costs. In fact, only in Italy its utilization has ensured, in the last years, a saving of 650 million euro for the farmers, without taking into account the environment and human health benefits. Furthermore, the isolation of halo/thermo-tolerant PGPR strains and their use will allow the recovery and cultivation of hundreds of thousands of hectares of saline and arid soils now unproductive, making agriculture more respectful of agro-ecosystems also in view of upcoming climate change.https://www.mdpi.com/2076-3417/11/5/2125salt stress toleranceorganic amendmenthalo/thermo-tolerancesustainable agriculture |
| spellingShingle | Stefano Castiglione Gianmaria Oliva Giovanni Vigliotta Giorgia Novello Elisa Gamalero Guido Lingua Angela Cicatelli Francesco Guarino Effects of Compost Amendment on Glycophyte and Halophyte Crops Grown on Saline Soils: Isolation and Characterization of Rhizobacteria with Plant Growth Promoting Features and High Salt Resistance Applied Sciences salt stress tolerance organic amendment halo/thermo-tolerance sustainable agriculture |
| title | Effects of Compost Amendment on Glycophyte and Halophyte Crops Grown on Saline Soils: Isolation and Characterization of Rhizobacteria with Plant Growth Promoting Features and High Salt Resistance |
| title_full | Effects of Compost Amendment on Glycophyte and Halophyte Crops Grown on Saline Soils: Isolation and Characterization of Rhizobacteria with Plant Growth Promoting Features and High Salt Resistance |
| title_fullStr | Effects of Compost Amendment on Glycophyte and Halophyte Crops Grown on Saline Soils: Isolation and Characterization of Rhizobacteria with Plant Growth Promoting Features and High Salt Resistance |
| title_full_unstemmed | Effects of Compost Amendment on Glycophyte and Halophyte Crops Grown on Saline Soils: Isolation and Characterization of Rhizobacteria with Plant Growth Promoting Features and High Salt Resistance |
| title_short | Effects of Compost Amendment on Glycophyte and Halophyte Crops Grown on Saline Soils: Isolation and Characterization of Rhizobacteria with Plant Growth Promoting Features and High Salt Resistance |
| title_sort | effects of compost amendment on glycophyte and halophyte crops grown on saline soils isolation and characterization of rhizobacteria with plant growth promoting features and high salt resistance |
| topic | salt stress tolerance organic amendment halo/thermo-tolerance sustainable agriculture |
| url | https://www.mdpi.com/2076-3417/11/5/2125 |
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