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Fungal microbiome indicators are associated with genotypic variation in pea root rot susceptibility when intercropped with barley

Cadot, Selma; Hohmann, Pierre; Hsung, Ming-Hui; Hartmann, Martin; Haug, Benedikt; Wille, Lukas; Messmer, Monika M. and Bodenhausen, Natacha (2024) Fungal microbiome indicators are associated with genotypic variation in pea root rot susceptibility when intercropped with barley. Phytobiomes, 8 (1), pp. 97-109.

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Document available online at: https://apsjournals.apsnet.org/doi/abs/10.1094/PBIOMES-07-23-0066-MF


Summary in the original language of the document

Intercropping of legume and cereal crop species shows potential to reduce root disease pressures by changing root-associated microbiomes and improve nitrogen (N) use via soil N-dependent fixation of atmospheric N2 by symbiotic rhizobia. A two-year field study was conducted to evaluate the effect of pea-barley association on crop performance and on the root fungal community. Five pea cultivars (Alvesta, Karpate, Mytic, Respect, Vitra) were grown either in pure stands or mixed with one variety of barley (Atrika). We measured crop grain yield and root rot incidence and analyzed root fungal communities. In mixed stands, total grain yield was more stable compared with each pure stand, but pea root disease incidence was higher except for cv. Vitra and Karpate. The effect of cropping system on fungal alpha diversity depended on the cultivar, with cv. Vitra showing higher Shannon diversity and cv. Alvesta showing lower richness in mixed compared with pure stands. All four operational taxonomic units (OTUs) belonging to the Didymellaceae family were positively associated with pea root rot, and another disease-asssociated OTU in pea, Neoascoschyta exitialis, was found to be also part of the barley core microbiome. Eleven out of 12 OTUs belonging to the Glomeraceae family were associated with healthy roots and abundant in cv. Vitra. This study shows how the phenotype and fungal microbiome of different pea cultivars respond distinctly to intercropping. Furthermore, the identification of disease- and health-associated taxa in the pea root fungal community refines the characterization of different cultivar candidates for intercropping.


EPrint Type:Journal paper
Keywords:mixed cropping, pea-barley intercropping, root mycobiome, fungal diversity, pea root rot complex, plant breeding, disease resistance, phytopathology, on-farm experiment, legumes, AMF, ReMIX, Abacus, FiBL20065, FiBL10184
Agrovoc keywords:
Language
Value
URI
English
mixed cropping
http://aims.fao.org/aos/agrovoc/c_4871
English
intercropping
http://aims.fao.org/aos/agrovoc/c_3910
English
plant breeding
http://aims.fao.org/aos/agrovoc/c_5956
Subjects: Crop husbandry > Crop combinations and interactions
Crop husbandry > Production systems > Cereals, pulses and oilseeds
Crop husbandry > Breeding, genetics and propagation
Crop husbandry > Crop health, quality, protection
Research affiliation: Switzerland > ETHZ - Agrarwissenschaften
Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Crops > Arable crops > Cereals
Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Crops > Anbautechnik > Mixed cropping
Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Crops > Seeds and breeding
Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Soil > Soil quality
Spain > Other organizations Spain
European Union > Horizon 2020 > Remix
Horizon Europe or H2020 Grant Agreement Number:727217
DOI:10.1094/PBIOMES-07-23-0066-MF
Related Links:https://www.fibl.org/en/themes/projectdatabase/projectitem/project/1300, https://www.remix-intercrops.eu/, https://www.fibl.org/en/themes/projectdatabase/projectitem/project/2330
Deposited By: Forschungsinstitut für biologischen Landbau, FiBL
ID Code:52882
Deposited On:20 Mar 2024 07:52
Last Modified:04 Jun 2024 08:27
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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