Molecular diversity of arbuscular mycorrhizal fungi in onion roots from organic and conventional farming systems in the Netherlands
| Autor: | István Parádi, Olga E. Scholten, Guillermo A. Galván, Thomas W. Kuyper, Jacqueline Baar, Karin Burger, Chris Kik |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: |
Allium cepa
Organic farming Centrum voor Genetische Bronnen Nederland Biodiversity Plant Science Biology DNA Ribosomal Plant Roots soil Glomeromycota PRI Biodiversiteit en Veredeling Mycorrhizae Botany Onions Genetics Colonization DNA Fungal Molecular Biology glomus-intraradices Ecology Evolution Behavior and Systematics Glomus Bodembiologie Phylogeny Soil Microbiology phosphate Netherlands Phylotype Original Paper Mycorrhizal colonization Fungal genetics Agriculture General Medicine Soil Biology biology.organism_classification PE&RC colonization crops PRI Biodiversity and Breeding communities plant-growth responses impact grassland Soil microbiology |
| Zdroj: | Mycorrhiza Mycorrhiza, 19(5), 317-328 Mycorrhiza 19 (2009) 5 |
| ISSN: | 1432-1890 0940-6360 |
| Popis: | Diversity and colonization levels of naturally occurring arbuscular mycorrhizal fungi (AMF) in onion roots were studied to compare organic and conventional farming systems in the Netherlands. In 2004, 20 onion fields were sampled in a balanced survey between farming systems and between two regions, namely, Zeeland and Flevoland. In 2005, nine conventional and ten organic fields were additionally surveyed in Flevoland. AMF phylotypes were identified by rDNA sequencing. All plants were colonized, with 60% for arbuscular colonization and 84% for hyphal colonization as grand means. In Zeeland, onion roots from organic fields had higher fractional colonization levels than those from conventional fields. Onion yields in conventional farming were positively correlated with colonization level. Overall, 14 AMF phylotypes were identified. The number of phylotypes per field ranged from one to six. Two phylotypes associated with the Glomus mosseae–coronatum and the G. caledonium–geosporum species complexes were the most abundant, whereas other phylotypes were infrequently found. Organic and conventional farming systems had similar number of phylotypes per field and Shannon diversity indices. A few organic and conventional fields had larger number of phylotypes, including phylotypes associated with the genera Glomus-B, Archaeospora, and Paraglomus. This suggests that farming systems as such did not influence AMF diversity, but rather specific environmental conditions or agricultural practices. Electronic supplementary material The online version of this article (doi:10.1007/s00572-009-0237-2) contains supplementary material, which is available to authorized users. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink