scholarly journals Intercropping of wheat changed cucumber rhizosphere bacterial community composition and inhibited cucumber Fusarium wilt disease

2020 ◽  
Vol 77 (5) ◽  
Author(s):  
Xue Jin ◽  
Yajing Shi ◽  
Fengzhi Wu ◽  
Kai Pan ◽  
Xingang Zhou
Keyword(s):  
Bacterial Community ◽  
Community Composition ◽  
Fusarium Wilt ◽  
Bacterial Community Composition ◽  
Wilt Disease ◽  
Fusarium Wilt Disease ◽  
Rhizosphere Bacterial Community ◽  
Cucumber Fusarium Wilt

scholarly journals Rotations with Indian Mustard and Wild Rocket Suppressed Cucumber Fusarium Wilt Disease and Changed Rhizosphere Bacterial Communities

2019 ◽  
Vol 7 (2) ◽  
pp. 57 ◽  
Author(s):  
Xue Jin ◽  
Jian Wang ◽  
Dalong Li ◽  
Fengzhi Wu ◽  
Xingang Zhou
Keyword(s):  
Bacterial Community ◽  
Fusarium Wilt ◽  
Bacterial Community Composition ◽  
Indian Mustard ◽  
Wilt Disease ◽  
Crop Rotations ◽  
Pseudomonas Spp ◽  
Fusarium Wilt Disease ◽  
Wild Rocket ◽  
Cucumber Fusarium Wilt

Crop monocropping usually results in an enrichment of soil-borne pathogens in soil. Crop rotation is an environmentally friendly method for controlling soil-borne diseases. Plant rhizosphere microorganisms, especially plant-beneficial microorganisms, play a major role in protecting plants from pathogens, but responses of these microorganisms to crop rotation remain unclear. Here, we evaluated the effects of rotations with Indian mustard (Brassica juncea) and wild rocket (Diplotaxis tenuifolia (L.) DC.) on cucumber Fusarium wilt disease caused by Fusarium oxysporum f.sp. cucumerinum Owen (FOC). Cucumber rhizosphere bacterial community composition was analyzed by high-throughput amplicon sequencing. Bacteria, Pseudomonas spp., 2,4-diacetylphloroglucinol (an antifungal secondary metabolite) producer and FOC abundances were estimated by real-time PCR. Rotations with Indian mustard and wild rocket suppressed cucumber Fusarium wilt disease and cucumber rhizosphere FOC abundance. Crop rotations increased cucumber rhizosphere bacteria, Pseudomonas spp. and 2,4-diacetylphloroglucinol producer abundances. Moreover, crop rotations changed cucumber rhizosphere bacterial community composition and increased bacterial community diversity. However, crop rotations decreased soil inorganic nitrogen content and inhibited cucumber seedling growth. Overall, rotations with Indian mustard and wild rocket suppressed cucumber Fusarium wilt disease, which might be linked to the increased rhizosphere bacterial diversity and abundances of potential plant-beneficial microorganisms (such as Pseudomonas spp. and 2,4-diacetylphloroglucinol producer).

scholarly journals Nutrient recovery from anaerobic digestion of food waste: impacts of digestate on plant growth and rhizosphere bacterial community composition and potential function in ryegrass

2020 ◽  
Vol 56 (7) ◽  
pp. 973-989
Author(s):  
Ai-Tian Ren ◽  
Lynette K. Abbott ◽  
Yinglong Chen ◽  
You-Cai Xiong ◽  
Bede S. Mickan
Keyword(s):  
Bacterial Community ◽  
Ammonium Nitrate ◽  
Community Composition ◽  
Bacterial Community Composition ◽  
N Cycling ◽  
Fungal Hyphae ◽  
Urea Ammonium Nitrate ◽  
C And N ◽  
Rhizosphere Bacterial Community ◽  
C And N Cycling

Abstract Global food wastage equates to about 1.3 billion tons per year, which causes serious environmental impacts. The objective of this study was to evaluate the influences of addition of digestate from food waste in comparison to a synthetic liquid urea ammonium nitrate solution on plant growth, rhizosphere bacterial community composition and diversity, and hyphal abundance of arbuscular mycorrhizal (AM) fungi. Plant and soil samples were collected at 25, 50, and 75 days after seedling emergence. Annual ryegrass growth was significantly increased by both liquid urea ammonium nitrate and digestate, and digestate was just as effective as liquid urea ammonium nitrate. Additionally, digestate (50 kg N ha−1) significantly increased AM fungal hyphae density. Liquid urea ammonium nitrate (50 kg N ha−1) significantly decreased AM fungal hyphae density compared with liquid urea ammonium nitrate (25 kg N ha−1) at DAE 75. Digestate and liquid urea ammonium nitrate applications significantly shifted the bacterial community composition and OTU richness and changed the abundance of microbial C and N-cycling genes, while application rates had no significant effect. Structural equation modeling showed that digestate and UAN addition both directly and indirectly affected bacterial, C and N cycling genes community composition; the indirect effects were related to increased soil NO3− content and reduced pH. This study showed that the use of digestate as a soil amendment can be environmentally effective and can provide a sustainable supply of nutrients that increases soil organic C. Moreover, the use of digestate can readily be incorporated into agricultural practices with potentially less impact on soil microflora diversity and function than conventional fertilizers.

scholarly journals Agricultural Management Affects the Active Rhizosphere Bacterial Community Composition and Nitrification

mSystems ◽  
2021 ◽  
Author(s):  
Guillaume Bay ◽  
Conard Lee ◽  
Chiliang Chen ◽  
Navreet K. Mahal ◽  
Michael J. Castellano ◽  
...  
Keyword(s):  
Climate Change ◽  
Water Quality ◽  
Bacterial Community ◽  
Community Composition ◽  
Inorganic Nitrogen ◽  
Bacterial Community Composition ◽  
Agricultural Management ◽  
N Fertilizer ◽  
Low Diversity ◽  
Rhizosphere Bacterial Community

Crops in simplified, low-diversity agroecosystems assimilate only a fraction of the inorganic nitrogen (N) fertilizer inputs. Much of this N fertilizer is lost to the environment as N oxides, which degrade water quality and contribute to climate change and loss of biodiversity.

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