Record ID No. |
1941 |
Author(s) |
Herdler S., Kreuzer K., Scheu S., Bonkowskia M , 2008 |
Affiliation |
Tech Univ Darmstadt, Inst Zool, Schnittspahnstr 3, D-64287 Darmstadt, GERMANY |
Title |
Interactions between arbuscular mycorrhizal fungi (Glomus intraradices, Glomeromycota) and amoebae (Acanthamoeba castellanii, Protozoa) in the rhizosphere of rice (Oryza sativa) |
Source. Vol.(no):Page |
Soil Biology & Biochemistry.40(3):660-668p. |
Categories |
Arbuscular Mycorrhiza |
Subjects |
Biochemistry |
Sub-subjects |
Miscellaneous |
Organism |
n.a. |
Country |
GERMANY, Europe |
Abstracts |
Rice plants (Oryza sativa L.) were grown in microcosms containing soil with a
diverse bacterial community (control) and inoculated either with an axenic arbuscular mycorrhizal
fungus (Glomus intraradices) or an axenic inoculum of protozoan grazers of bacteria (Acanthamoeba
castellanii), or both, in a factorial design. Amoebae and mycorrhiza affected the root
architecture of rice in opposite directions, with mycorrhiza reducing and protozoa increasing
early root growth. Rice biomass did not increase in presence of mycorrhiza (x 1.08), but strongly
increased in presence of Acanthamoebae (x 1.29). The positive effects of amoebae were always
reduced when plants were also infected with mycorrhiza. Microbial biomass increased (x 1.4) and
microbial growth was less limited by phosphorus in presence of mycorrhiza. However, plant
phosphorus uptake did not increase, rather, plant concentrations of carbon and nutrients
decreased in presence of mycorrhiza, suggesting a sequestration of resources during the
establishment of a mycorrhizal network. Amoebae strongly interacted with, and partly compensated
for, the effects of mycorrhiza, demonstrating that interactions between AM fungi and the
microbial food web in the rhizosphere significantly feed back on early plant performance. (c)
2007 Elsevier Ltd. All rights reserved.
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