Pinpointing the Distinctive Impacts of Ten Cover Crop Species on the Resident and Active Fractions of the Soil Microbiome

Cazzaniga, Sara Giulia; Braat, Lize; Elsen, S.J.J. van den; Plas, Carin  H. Lombaers van der; Visser, J.H.M.; Vicente, José Gaspar Maciá; Postma, J.; Mommer, Liesje; Helder, J.

doi:10.2139/ssrn.4142160

Cited by 3 publications

(6 citation statements)

References 48 publications

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“…This implies the presence of genotypic variation in oilseed radish with regard to an agronomically relevant threat. This observation confirms earlier results that were generated in a distinct experimental set-up while using a comparable technical approach (Cazzaniga et al, 2023a;Cazzaniga et al, 2023b). Genotypic variation regarding microbiome selection has been shown before for various plant species.…”

Section: Impact Of Cover Crops On the Native Nematode Antagonist' Com...supporting

confidence: 92%

“…Additionally, oilseed radish cultivars were found to perform a strong selection on their rhizosphere microbes, which involved strong repression of several microorganisms and the pronounced stimulation of a minority, notably the beneficial Pseudomonas spp. (Cazzaniga et al, 2023a). Grasses tested in this thesis generally performed a mild selection on the microbes in their rhizosphere, but significant variation among species was observed which suggests the need for broader research on species-specific microbial signatures of grasses.…”

Section: Implications For the Applications Of Cover Crops On The Soil...mentioning

confidence: 92%

“…A substantial number of plant species can be grown as a cover crop provided they grow well outside the main growing season and as long as they can be terminated easily. Recent evidence has shown that different cover crop species can differentially select and simulate distinct fractions of the soil microbial communities (Cazzaniga et al, 2023a). Such manipulation of the soil microbial community could be instrumental in the defence against pathogens (Berendsen et al, 2012;Philippot et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…Such manipulation of the soil microbial community could be instrumental in the defence against pathogens (Berendsen et al, 2012;Philippot et al, 2013). Because cover crops steer the soil microbiome in a species-specific manner (Cazzaniga et al, 2023a), we hypothesised that cover crops can be applied to boost the antagonistic potential of the microbial community in soils.…”

Section: Introductionmentioning

confidence: 99%

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Nurturing belowground life: the role of cover crops in shaping soil microbial communities in agroecosystems

Cazzaniga

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Cover crops are used in agriculture to minimise soil erosion, prevent nutrient leaching and increase soil organic matter content. Cover crops can also be grown to stimulate the soil microbial community to improve soil biological conditions. Despite their widespread use, little is known about the impact of different cover crop species on the composition and activity of the soil microbiome. Here we investigate the effect of distinct cover crop species on the rhizosphere microbiome and characterise both the resident (ribosomal (r)DNA-based) and the potentially active (rRNA-based) fractions of the bacterial, fungal, protist and metazoan communities in the cover crops rhizosphere. We conducted a field experiment using 70-litre bottomless containers in which we grew ten monocultures of commonly used cover crop species belonging to five plant families, and an unplanted control treatment (fallow). The total DNA and RNA were extracted from soil and the bacterial, fungal, protistan and metazoan communities were characterized using Illumina MiSeq sequencing. We found that all cover crop species significantly impacted the resident and the potentially active microbial communities in their rhizospheres. Cover crops exerted distinct selection strengths on the native microbial communities. For individual cover crops, the impacts on the resident and the potentially active microbial communities differed while showing similar overall tendencies. Oilseed radish (Brassicaceae) was shown to provoke the strongest microbial shifts, in part attributable to a promotion of the bacterial family Pseudomonadaceae and a repression of Microascaceae in the rhizosphere. Lentil (Fabaceae) induced a widespread stimulation of fungal taxa, including Trichocomaceae and fungal members of the Glomerales order, whereas black oat and hybrid ryegrass (both Poaceae) gave rise to relatively mild changes in the soil microbial communities. Analyses of rRNA-based rhizobiome data revealed that, except for phacelia, all cover crops induced an increase in microbial network complexity as compared to the fallow control. Data presented here provide a broad baseline for the effects of cover crops on four organismal groups, which may facilitate future cover crop selection to advance soil health.

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Section: Impact Of Cover Crops On the Native Nematode Antagonist' Com...supporting

confidence: 92%

Section: Implications For the Applications Of Cover Crops On The Soil...mentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Nurturing belowground life: the role of cover crops in shaping soil microbial communities in agroecosystems

Cazzaniga

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show abstract

“…Cover crops offer various benefits to soil health, including erosion control, soil fertility improvement, weed suppression, soil moisture maintenance, breaking of compact soil layers, and improving nutrient mobilization (Poeplau & Don, 2015;Blanco-Canqui et al, 2011). For example, legume cover crops like lentils and vetch are capable of fixing atmospheric nitrogen and releasing abundant amino acids and sugars as root exudates, thereby promoting beneficial bacterial and fungal communities (Cazzaniga et al, 2023). Thapa et al (2021) observed that incorporating cover crops in a mixture with legumes improved soil fungal abundance, enzymatic activities, and overall soil biological health under wheat-sorghum rotations in semi-arid ecosystems.…”

Section: Cover Cropsmentioning

confidence: 99%