Details zur Publikation |
| Kategorie | Textpublikation |
| Referenztyp | Zeitschriften |
| URL | https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2025.1720323/abstract |
Lizenz  |
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| Titel (primär) | Spatial heterogeneity of soil phosphorus (P) influencing bacterial functional adaptations in alkaline calcareous soils |
| Autor | Tabbasum, S.; Yahya, M.
; Zia, M.H.; ul Haq, M.; Anwar, S.; Azeem Khan, U.; Mahreen, N.; Ejaz, K.; Tarkka, M.T.; Yasmin, S. |
| Quelle | Frontiers in Microbiology |
| Erscheinungsjahr | 2025 |
| Department | BOOEK |
| Sprache | englisch |
| Topic | T5 Future Landscapes |
| Keywords | Soil phosphorus heterogeneity; PSB; phosphate acquisition; Edaphic profiling; Bacterial ecophysiological adaptations; Recursive partitioning regression analysis |
| Abstract | To enhance sustainable soil fertility and efficient phosphorus (P) management, phosphate-solubilizing bacteria (PSB) play a central role in solubilizing soil mineral phosphorus by releasing organic acids and acidifying micro-niches. Thus far, the influence of spatial P heterogeneity on bacterial eco-physiological adaptations to P-limited, alkaline soils remains poorly understood. This study examined how soil edaphic factors vary across major wheat-growing regions, assessing their influence on the abundance and functional properties of culturable PSB. Soil available P was the strongest predictor of culturable bacterial abundance, with a threshold of P < 6.3 mg kg-1 dry soil driving major variations. At low P levels, organic matter played a key role, while at higher P levels, potassium (K ≥ 123) and pH further shaped bacterial abundance. Low-P soil PSB (LPSB) secreted elevated levels of organic acids such as malic, succinic, gibberellic and citric acid, but low levels of indole acetic acid. A clear trade-off was observed between P solubilization and growth-related traits: LPSB invested more in acquiring resources (e.g., producing siderophores and organic acids) and less in synthesizing phytohormones. A net house study showed that LPSB contribute to plant growth. Plants with 70% phosphate fertilization (P70) and PSB inoculation reached the yield levels comparable to those with 100% fertilization without the PSB, indicating the potential of PSB to reduce dependency on fertilizers. This was associated with a significant increase in wheat biomass (24.3%), yield (28.53%) and P use efficiency (31.66%) by LPSB inoculation compared to the control P70. Our findings emphasize the importance of microbial functional plasticity in enhancing P use efficiency in P-limited soil, offering a basis for developing climate-smart bioformulations to improve sustainable crop productivity. |
| dauerhafte UFZ-Verlinkung | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=31651 |
| Tabbasum, S., Yahya, M., Zia, M.H., ul Haq, M., Anwar, S., Azeem Khan, U., Mahreen, N., Ejaz, K., Tarkka, M.T., Yasmin, S. (2025): Spatial heterogeneity of soil phosphorus (P) influencing bacterial functional adaptations in alkaline calcareous soils Front. Microbiol. |
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