Abstract
Europeanalder seedlings were inoculated with a suspension of the putative plant growthpromoting rhizobacterium (PGPR) Bacillus pumilus (CECT5105), or left non-inoculated (controls) in two different soils, and grownundercontrolled conditions. Soil A showed a thick texture, slightly acidic with ahigh mineral nitrogen content, while soil B showed a thin texture, basic andwith a lower nitrogen content. At each sampling time, over an 8-week period,shoot and root systems of the plants were measured, nodules counted, and shootand root length and surface were determined. In addition, changes in themicrobial rhizosphere structure were evaluated by the phospholipid fatty acid(PLFA) profile extracted directly from the rhizosphere soil. The increasesdetected in shoot surface were significant only in soil A, while the rootsystemwas affected in both soils. In soil A, inoculation with B.pumilus caused a perturbation that subsequently disappeared, whilethe rhizosphere community structure was seriously altered in soil B. Allbiometric parameters were enhanced to a greater extent in soil A, in which theinoculum did not alter the existing rhizosphere communities and nutrientavailability was better.
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Ramos, B., Lucas García, J.A., Probanza, A. et al. Influence of an indigenous European alder (Alnus glutinosa (L.) Gaertn) rhizobacterium (Bacillus pumilus) on the growth of alder and its rhizosphere microbial community structure in two soils. New Forests 25, 149–159 (2003). https://doi.org/10.1023/A:1022688020897
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DOI: https://doi.org/10.1023/A:1022688020897