caa a22 4500 605518211 CHVBK 20210128100724.0 cr unu---uuuuu 210128e20151101xx s 000 0 eng 10.1007/s00572-015-0638-3 doi (NATIONALLICENCE)springer-10.1007/s00572-015-0638-3 Impact of water regimes on an experimental community of four desert arbuscular mycorrhizal fungal (AMF) species, as affected by the introduction of a non-native AMF species [Elektronische Daten] [Sarah Symanczik, Pierre-Emmanuel Courty, Thomas Boller, Andres Wiemken, Mohamed Al-Yahya'ei] Field studies have revealed the impact of changing water regimes on the structure of arbuscular mycorrhizal fungal (AMF) communities, but it is not known what happens to the abundance of individual AMF species within the community when the water conditions in the rhizosphere change. The behavior of four AMF species isolated from the Arabian desert (Diversispora aurantia, Diversispora omaniana, Septoglomus africanum, and an undescribed Paraglomus species) was investigated when assembled in microcosms containing Sorghum bicolor as host plant, and treated with various water regimes. Furthermore, the impact of invasion of these assemblages by Rhizophagus irregularis, an AMF species widely used in commercial inocula, was studied. The abundance of each AMF species in sorghum roots was measured by determining the transcript numbers of their large ribosomal subunit (rLSU) by real-time PCR, using cDNA and species-specific primers. Plant biomass and length of AMF extraradical hyphae were also measured. The abundance of each AMF species within the sorghum roots was influenced by both the water regime and the introduction of R. irregularis. Under dry conditions, the introduction of R. irregularis reduced the total abundance of all native AMF species in roots and also led to a reduction in the amount of extraradical mycelium, as well as to a partial decrease in plant biomass. The results indicate that both water regime and the introduction of an invasive AMF species can strongly alter the structure of an AMF native assemblage with a consequent impact on the entire symbiotic mycorrhizal relationship. Springer-Verlag Berlin Heidelberg, 2015 Adaptation nationallicence Arbuscular mycorrhiza nationallicence Competition nationallicence Desert nationallicence Mycorrhizal community nationallicence Water regime nationallicence Symanczik Sarah Zurich Basel Plant Science Center, Department of Environmental Sciences, University of Basel, Hebelstrasse 1, CH-4056, Basel, Switzerland aut Courty Pierre-Emmanuel Zurich Basel Plant Science Center, Department of Environmental Sciences, University of Basel, Hebelstrasse 1, CH-4056, Basel, Switzerland aut Boller Thomas Zurich Basel Plant Science Center, Department of Environmental Sciences, University of Basel, Hebelstrasse 1, CH-4056, Basel, Switzerland aut Wiemken Andres Zurich Basel Plant Science Center, Department of Environmental Sciences, University of Basel, Hebelstrasse 1, CH-4056, Basel, Switzerland aut Al-Yahya'ei Mohamed Zurich Basel Plant Science Center, Department of Environmental Sciences, University of Basel, Hebelstrasse 1, CH-4056, Basel, Switzerland aut Mycorrhiza Springer Berlin Heidelberg 25/8(2015-11-01), 639-647 0940-6360 25:8<639 2015 25 572 https://doi.org/10.1007/s00572-015-0638-3 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00572-015-0638-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Symanczik Sarah Zurich Basel Plant Science Center, Department of Environmental Sciences, University of Basel, Hebelstrasse 1, CH-4056, Basel, Switzerland aut NATIONALLICENCE 700 1- Courty Pierre-Emmanuel Zurich Basel Plant Science Center, Department of Environmental Sciences, University of Basel, Hebelstrasse 1, CH-4056, Basel, Switzerland aut NATIONALLICENCE 700 1- Boller Thomas Zurich Basel Plant Science Center, Department of Environmental Sciences, University of Basel, Hebelstrasse 1, CH-4056, Basel, Switzerland aut NATIONALLICENCE 700 1- Wiemken Andres Zurich Basel Plant Science Center, Department of Environmental Sciences, University of Basel, Hebelstrasse 1, CH-4056, Basel, Switzerland aut NATIONALLICENCE 700 1- Al-Yahya'ei Mohamed Zurich Basel Plant Science Center, Department of Environmental Sciences, University of Basel, Hebelstrasse 1, CH-4056, Basel, Switzerland aut NATIONALLICENCE 773 0- Mycorrhiza Springer Berlin Heidelberg 25/8(2015-11-01), 639-647 0940-6360 25:8<639 2015 25 572