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Organic farming increases richness of fungal taxa in the wheat phyllosphere

Karlsson, Ida; Friberg, Hanna; Kolseth, Anna-Karin; Steinberg, Christian and Persson, Paula (2017) Organic farming increases richness of fungal taxa in the wheat phyllosphere. Molecular Ecology, pp. 3424-3436.

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Document available online at: https://hal.inrae.fr/hal-02624523


Organic farming is often advocated as an approach to mitigate biodiversity loss on agricultural land. The phyllosphere provides a habitat for diverse fungal communities that are important for plant health and productivity. However, it is still unknown how organic farming affects the diversity of phyllosphere fungi in major crops. We sampled wheat leaves from 22 organically and conventionally cultivated fields in Sweden, paired based on their geographical location and wheat cultivar. Fungal communities were described using amplicon sequencing and real-time PCR. Species richness was higher on wheat leaves from organically managed fields, with a mean of 54 operational taxonomic units (OTUs) compared with 40 OTUs for conventionally managed fields. The main components of the fungal community were similar throughout the 350-km-long sampling area, and seven OTUs were present in all fields : <em>Zymoseptoria</em>, <em>Dioszegia fristingensis</em>, <em>Cladosporium</em>, <em>Dioszegia hungarica</em>, <em>Cryptococcus</em>, <em>Ascochyta and Dioszegia</em>. Fungal abundance was highly variable between fields, 10(3)-10(5) internal transcribed spacer copies per ng wheat DNA, but did not differ between cropping systems. Further analyses showed that weed biomass was the strongest explanatory variable for fungal community composition and OTU richness. These findings help provide a more comprehensive understanding of the effect of organic farming on the diversity of organism groups in different habitats within the agroecosystem.

EPrint Type:Journal paper
Keywords:diversity measures (en), farming systems (en), high-throughput sequencing (en), Triticum aestivum (en), winter-wheat (en), multivariate analyses (en), conventional wheat (en), foliar pathogens (en), biodiversity (en), diversity (en), cereals (en), microbiome (fr), microbiota (fr), septoria-tritici (fr), management (fr), communities (fr)
Subjects:"Organics" in general
Research affiliation: France > INRAe - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement
ISSN:ISSN: 0962-1083
Project ID:HAL-INRAe
Deposited By: PENVERN, Servane
ID Code:41122
Deposited On:12 Aug 2021 10:37
Last Modified:12 Aug 2021 10:37
Document Language:English

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