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Effects of phosphorus-mobilizing bacteria on tomato growth and soil microbial activity

Title data

Nassal, Dinah ; Spohn, Marie ; Eltlbany, Namis ; Jacquiod, Samuel ; Smalla, Kornelia ; Marhan, Sven ; Kandeler, Ellen:
Effects of phosphorus-mobilizing bacteria on tomato growth and soil microbial activity.
In: Plant and Soil. (2018) . - in press.
ISSN 1573-5036
DOI: https://doi.org/10.1007/s11104-017-3528-y

Abstract in another language

AimsThe aim of our study was to clarify whether inoculating a soil with Pseudomonas sp. RU47 (RU47) bacteria would stimulate the enzymatic cleavage of organic Pcompounds in the rhizosphere and bulk soil, promoting plant growth. Adding either viable or heat treated RU47 cells made it possible to separate direct from indirecteffects of the inoculum on P cycling in soil and plants.MethodsWe performed a rhizobox experiment in the greenhouse with tomato plants (Solanum lycopersicum) under low P soil conditions. Three inoculation treatments wereconducted, using unselectively grown soil bacteria (bacterial mix), heat treated (HTRU47) and viable RU47 (RU47) cells, and one not inoculated, optimally P-fertilized treatment. We verified plant growth, nutrient availability, enzyme activities andmicrobial community structure in soil.ResultsA plant growth promotion effect with improved P uptake was observed in both RU47 treatments. Inoculations of RU47 cells increased microbial phosphatase activity (PA) in the rhizosphere.ConclusionsPlant growth promotion by RU47 cells is primarily associated with increased microbial PA in soil, while promotion of indigenous Pseudomonads as well as phytohormonal effects appear to be the dominant mechanisms when adding HT-RU47 cells. Thus, Powered by Editorial Manager® and ProduXion Manager® from Aries Systems Corporation using RU47 offers a promising approach for more efficient P fertilization in agriculture.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER144164
Institutions of the University: Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Soil Ecology
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 03 Jan 2018 07:45
Last Modified: 03 Jan 2018 07:45
URI: https://eref.uni-bayreuth.de/id/eprint/41102