Pflanze-Bakterien-Interaktionen bei Phosphatmangel in Sterilkultur
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We developed a plant culture system to investigate the effect of microorganisms with or without dicotyledonous plants on various parameter of the rhizosphere soil solution under phosphate deficiency. This plant culture system allows a detailed study of the interactions between microorganisms and plant roots. Compared to dual culture alkaline phosphatase-activity of Pseudomonas fluorescens Pf-5 was lower in the absence of plants even though the population density was similar. This could be due to the fact that Pf-5 without plants appeared to be starved. The composition of low-molecular organic acids of the rhizosphere soil solution in the absence of plants differed from that with plants. It is concluded that in the absence of plants phosphate-solubilizing capacity of Pf-5 as well as its contribution to phosphate uptake of the plants may be low.
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- Gerke, J., 1995: Chemische Prozesse der Nährsto ffmobilisierung in der Rhzzosphäre und ihre Bedeutung für den Übergang vom Boden in die Pflanze. Göttingen:Cuviller.Google Scholar