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Analysis of seed-associated bacteria and fungi on staple crops using the cultivation and metagenomic approaches [Elektronski vir]Tkalec, Valerija ...One of the key factors afecting seed quality is microbial communities residing on and in the seeds. In this study, microbial populations of seeds of conventionally and organically produced wheat, ... barley, and maize were analyzed using two diferent approaches: the cultivation method and metagenomics. For cultivation, three basic media were used: DG18 (for fungi), and nutrient agar or tryptic soy agar supplemented with cycloheximide or nystatin (for bacteria). Metagenomic sequencing was performed using the Illumina MiSeq platform. A total of 452 bacterial isolates comprising 36 genera and 5 phyla and 90 fungal isolates comprising 10 genera and 3 phyla were obtained from the seed surfaces. Among bacteria, representatives from the genera Bacillus, Pantoea, Paenibacillus, and Curtobacterium predominated, and among fungi, Aspergillus predominated. A total of 142 fungal OTUs and 201 bacterial OTUs were obtained from all the samples. Proteobacteria, Firmicutes, Bacteroides, and Actinobacteria comprised most of the bacterial OTUs, and Ascomycota comprised most of the fungal OTUs. Only 3 fungal OTUs (representatives of Curvibasidium, Venturia, and Dermateaceae) were exclusively present only within seeds and not on the seed surfaces. Barley seeds had the highest microbial load and richness, whereas corn had the lowest. Wheat and barley shared a higher number of OTUs than either of them did with corn with higher overlap between conventionally grown cereals than between organically grown cereals. Some OTUs were farming specifc. This study demonstrates that the microbiome of cereal seeds is greatly dependent on the species of the host and is less afected by agricultural practices.Source: Folia microbiologica. - ISSN 1874-9356 (Vol. 67, iss. 3, 2022, Str. 351-361)Type of material - e-article ; adult, seriousPublish date - 2022Language - englishCOBISS.SI-ID - 99863043
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Database name | Field | Year |
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Tkalec, Valerija | 33511 |
Mahnič, Aleksander | 37544 |
Gselman, Peter | 33428 |
Rupnik, Maja, 1967- | 12278 |
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