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Effects of soil type and salinity levels on the performance and bacteriome of the halophyte Atriplex nummularia (old man saltbush).
- Source :
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Plant & Soil . Jun2024, Vol. 499 Issue 1/2, p621-637. 17p. - Publication Year :
- 2024
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Abstract
- Background: Soil salinization has a major impact on crop production and it is expected to increase in area in the coming years. In this scenario, exploring the potential of halophytes and their plant-associated microbiomes as to increase phytoremediation strategies represents a suitable and sustainable strategy. Methods: We conducted a microcosm experiment with the halophyte Atriplex nummularia, cultivating it in two contrasting soils (clay and sandy) at distinct levels of salinity (0, 10 and 20 mS/cm). After 109 days, we assessed its growth and bacteriome composition, through 16S rRNA gene sequencing of the leaf and root endospheres, as well as rhizosphere. Results: A. nummularia showed increased growth under salinity levels of up to 20 mS/cm in both soils. Salinity and soil type had an effect in determining the rhizosphere bacterial communities of A. nummularia, with a stronger signal in the sandy soil. Most interestingly, no differences were found in endophytic bacterial communities, suggesting a strong buffering effect of the plant physiology, even though this halophyte accumulates NaCl. Last, functional prediction based on a subset of differentially abundant taxa in the rhizosphere revealed an increase in plant-growth promotion and salinity tolerance traits in higher salinity, indicating simultaneous selection by salinity and A. nummularia under stress. Conclusion: Collectively, these results provide valuable insights into halophyte-associated bacteria, advancing our understanding of this complex system with potential application in phytoremediation strategies for saline soils. [ABSTRACT FROM AUTHOR]
- Subjects :
- *SOIL salinity
*SOIL classification
*ATRIPLEX
*SOIL salinization
*PLANT physiology
Subjects
Details
- Language :
- English
- ISSN :
- 0032079X
- Volume :
- 499
- Issue :
- 1/2
- Database :
- Academic Search Index
- Journal :
- Plant & Soil
- Publication Type :
- Academic Journal
- Accession number :
- 177538973
- Full Text :
- https://doi.org/10.1007/s11104-024-06484-2