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Unique arbuscular mycorrhizal fungal communities uncovered in date palm plantations and surrounding desert habitats of Southern Arabia

By Mohamed N. Al-Yahya’ei, Fritz Oehl, Marta Vallino, Erica Lumini, Dirk Redecker, Andres Wiemken and Paola Bonfante

Abstract

The main objective of this study was to shed light on the previously unknown arbuscular mycorrhizal fungal (AMF) communities in Southern Arabia. We explored AMF communities in two date palm (Phoenix dactylifera) plantations and the natural vegetation of their surrounding arid habitats. The plantations were managed traditionally in an oasis and according to conventional guidelines at an experimental station. Based on spore morphotyping, the AMF communities under the date palms appeared to be quite diverse at both plantations and more similar to each other than to the communities under the ruderal plant, Polygala erioptera, growing at the experimental station on the dry strip between the palm trees, and to the communities uncovered under the native vegetation (Zygophyllum hamiense, Salvadora persica, Prosopis cineraria, inter-plant area) of adjacent undisturbed arid habitat. AMF spore abundance and species richness were higher under date palms than under the ruderal and native plants. Sampling in a remote sand dune area under Heliotropium kotschyi yielded only two AMF morphospecies and only after trap culturing. Overall, 25 AMF morphospecies were detected encompassing all study habitats. Eighteen belonged to the genus Glomus including four undescribed species. Glomus sinuosum, a species typically found in undisturbed habitats, was the most frequently occurring morphospecies under the date palms. Using molecular tools, it was also found as a phylogenetic taxon associated with date palm roots. These roots were associated with nine phylogenetic taxa, among them eight from Glomus group A, but the majority could not be assigned to known morphospecies or to environmental sequences in public databases. Some phylogenetic taxa seemed to be site specific. Despite the use of group-specific primers and efficient trapping systems with a bait plant consortium, surprisingly, two of the globally most frequently found species, Glomus intraradices and Glomus mosseae, were not detected neither as phylogenetic taxa in the date palm roots nor as spores under the date palms, the intermediate ruderal plant, or the surrounding natural vegetation. The results highlight the uniqueness of AMF communities inhabiting these diverse habitats exposed to the harsh climatic conditions of Southern Arabia

Topics: Original Paper
Publisher: Springer-Verlag
OAI identifier: oai:pubmedcentral.nih.gov:3058386
Provided by: PubMed Central

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Citations

  1. (2002). Agricultural Research Annual Report, Ministry of Agriculture and Fisheries, Sultanate of Oman, pp 43–54 Muthukumar T, Udaiyan K
  2. (2011). Agriculture Organization (FAO)
  3. (2006). Appendicispora: a new genus in the arbuscular mycorrhiza-forming Glomeromycetes, with a discussion of the genus Archaeospora. Mycotaxon 97:163–182
  4. (2004). Colonisation with the arbuscular mycorrhizal fungus Glomus mosseae (Nicol. & Gerd.) enhanced phosphorus uptake from dry soil in Sorghum bicolor (L.). Plant Soil 261:245–255
  5. (2010). Educational, Scientific and Cultural Organization.
  6. (1986). Evaluation of VA infection levels in root systems. Research for estimation methods 208 Mycorrhiza (2011) 21:195–209having a functional significance. In: Gianinazzi-Pearson V, Gianinazzi S (eds) Physiological and genetical aspects of mycorrhizae.
  7. (1990). Manual for the identification of VA mycorrhizal fungi, 3rd edn. Synergistic Publications, Gainesville Schubert A, Hayman DS
  8. (2006). Mycorrhizas and soil structure. New Phytol 171:41–53 Rosendahl S, Stukenbrock EH (2004) Community structure of arbuscular mycorrhizal fungi in undisturbed vegetation revealed by analyses of LSU rDNA sequences. Mol Ecol 13:3179–3186 Sabet Y
  9. (1999). Oihabi A
  10. (2006). PCR protocols: a guide to methods and applications.
  11. (2007). Sci Res Agric Sci 1:25–32
  12. (1988). The scientific results of The Royal Geographical Society’s Oman Wahiba Sands Project 1985–1987.
  13. (2001). Water relations, drought and vesicular-arbuscular mycorrhizal symbiosis.