Soil properties influence bacterial abundance and diversity under different land-use regimes in semi-arid environments

Mhete, Modise; Eze, Peter N.; Rahube, Teddie O.; Akinyemi, Felicia O.

doi:10.1016/j.sciaf.2019.e00246

Cited by 88 publications

(67 citation statements)

References 45 publications

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“…Crop choice, which is an important factor in soil microbial biodiversity [ 68 ], could explain the lower bacterial diversity in Zone A, where fields with vegetables had lower biodiversity compared to maize and beans. Agricultural practices and soil properties are influential on the microbial diversity in soils [ 69 , 70 ] and the farms in Zone B can explain the insignificant results obtained for the bacterial diversity in these fields due to similarity of the treatments and soil properties. In Zone C, even though Fields 10 and 12 were under intensive commercial production at the time of sampling, cases of a high number of observed fungal species may be attributed to the very recent conversion of these fields from natural areas to agricultural fields.…”

Section: Discussionmentioning

confidence: 99%

Smallholder Farmers’ Practices and African Indigenous Vegetables Affect Soil Microbial Biodiversity and Enzyme Activities in Lake Naivasha Basin, Kenya

Taskin

Misci

Bandini

et al. 2021

Biology

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Loss of soil biodiversity and fertility in Sub-Saharan Africa (SSA) may put the food security of smallholder farmers in peril. Food systems in SSA are seeing the rise of African indigenous vegetables (AIVs) that are underexploited but locally consumed without being considered a primary source of food and income. Here we present a field study, a first of its kind, in which we investigated the effects of different cropping systems and inclusion of AIVs in the farming approach on bacterial and fungal biodiversity and community structures, enzymatic activity, and the alteration status of soils of the smallholder farmers in Kenya. When compared to mainstream farming approaches, the composition and biodiversity of bacteria and fungi under AIV cultivations was significantly different. Tillage had a significant impact only on the fungal communities. Fertilization and soil amendments caused shifts in microbial communities towards specialized degraders and revealed the introduction of specific microorganisms from amendments. Traditional homemade plant protection products did not cause any disturbance to either of soil bacteria or fungi. The soil alteration index based on enzyme activity successfully differentiated the alteration status for the first time in SSA. These findings could be useful for farmers to integrate AIVs with correct sustainable practices for a sustainable future.

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Section: Discussionmentioning

confidence: 99%

Smallholder Farmers’ Practices and African Indigenous Vegetables Affect Soil Microbial Biodiversity and Enzyme Activities in Lake Naivasha Basin, Kenya

Taskin

Misci

Bandini

et al. 2021

Biology

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“…This soil microbiome diversity is higher because of the important role played as the main controller in the ecosystem, related to activities based on organic matter mineralization rate. They have also been applied in determining of biological parameters related to soil quality (Mhete et al 2019).…”

Section: Diversity and Abundance Of Pineapple Bacteria In Semiarid Landmentioning

confidence: 99%

“…Meanwhile, the natural integrity of the ecosystem influences microbial diversity. Hence, habitats disturbed by land use management demonstrate altered soil characteristics (Mhete et al 2019). This is observed in terms of soil bacteria abundance and assortment in the stressed environment, which decreases by about 10 4 from the normal 10 8 -10 9 cells per gram of soil.…”

Section: Diversity and Abundance Of Pineapple Bacteria In Semiarid Landmentioning

confidence: 99%

“…Specifically, Proteobacteria are involved in the carbon, nitrogen, and sulfur cycles of various soil types, including rhizospheres, saline, and semi-arid regions (Khan et al 2020). The Firmicutes phylum has also been affiliated with the production of typical metabolites needed for biocontrol and plant growth (Mhete et al 2019). Also, Acidobacteria plays a role in this process due to the number of ecological capabilities, including the use of nitrite as a source of N, good adaptability to changes in macroelements and nutrients, soil acidity, expression of active transporters, and exopolysaccharide (EPS) production (Ek-Ramos et al 2019).…”

Section: Diversity and Abundance Of Pineapple Bacteria In Semiarid Landmentioning

confidence: 99%

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Diversity of endophytic and rhizosphere bacteria from pineapple (Ananas comosus) plant in semi-arid ecosystem

et al. 2020

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Abstract. Putrie RFW, Aryantha INP, Iriawati, Antonius S. 2020. Diversity of endophytic and rhizosphere bacteria from pineapple (Ananas comosus) plant in semi-arid ecosystem. Biodiversitas 21: 3084-3093. The natural environment majorly influences plant microbiome diversity, in terms of endophytic and rhizobacteria. Pineapple (Ananas comosus L. Merr) has been identified as one of host plants with a capacity to grow in semiarid ecosystems. The intrinsic microbial symbiont composition is recognized in a specific ecological niche. The scientific information available is limited to the inoculants' ability to reduce plant stress, although the diversity in a semiarid ecosystem has not been studied. The aim of this research is to investigate the diversity of endophytic and rhizosphere bacteria obtained from pineapple in a semiarid ecosystem. A total of 117 culturable microbial isolates, dominated by Gram-positive bacteria were obtained from pineapple (88) and rhizosphere (29). The metagenomic analysis showed higher diversity and abundance in rhizospheres compared to the endophytes. Actinobacterium was identified as the most populated colony, while Proteobacterium was more prominent in the host plant. The Bacillus genera were recognized as the dominant symbiont genus. Therefore, the culturable isolates were further developed as candidate inoculants for microbe databases. This is expected to be useful in broadening theoretical knowledge.

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“…Soil is consider a rich reservoir of diverse groups of microorganisms that involved in the biogeochemical cycles of bio-elements, and untapped resources for agricultural and industrial applications ( Mhete et al, 2020 ). The rhizosphere of plants is the hot spot of microbial activities dominated by bacteria generally known as rhizobacteria.…”

Section: Introductionmentioning

confidence: 99%

Genetic and metabolic diversities of rhizobacteria isolated from degraded soil of Ethiopia

Alemayehu

Kiros

Muleta

et al. 2020

Heliyon

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Genetic and metabolic diversities of rhizobacteria are the fundamental sources for their adaptation to cope with abiotic and biotic stresses in order to enhance growth and health of plants in the soil. Thus, this study was initiated to assess the genetic and metabolic diversities of rhizobacteria isolated from plants grown in degraded soil through BOX-PCR and partial sequencing of 16S rRNA genes. A total of eighty isolates were recovered and subjected to phenotypic profiling of carbohydrate and amino acid utilization, BOX PCR and 16S rRNA profiling. The phenotypic profiling showed remarkable metabolic versatility with Ochrobactrum spp, Pseudomonas spp and Klebsiella spp, and BOX-PCR showed greater discriminatory power for fingerprinting of rhizobacterial isolates with high degree of polymorphism. Bacillus spp showed the highest Simpson's diversity Index. The 16S rRNA genes sequence assigned the rhizobacteria to phyla Proteobacteria with Gammaproteobacteria and Alphaproteobacteria classes and Firmicutes with Bacilli class. The data also showed that the most dominant species were Pseudomonas and Ochrobactrum . Genetic and metabolic diversities of the rhizobacterial isolates reveal the potential of these microbes for plant growth improvement under water deficient soil after testing other inoculant traits.

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Soil properties influence bacterial abundance and diversity under different land-use regimes in semi-arid environments

Cited by 88 publications

References 45 publications

Smallholder Farmers’ Practices and African Indigenous Vegetables Affect Soil Microbial Biodiversity and Enzyme Activities in Lake Naivasha Basin, Kenya

Smallholder Farmers’ Practices and African Indigenous Vegetables Affect Soil Microbial Biodiversity and Enzyme Activities in Lake Naivasha Basin, Kenya

Diversity of endophytic and rhizosphere bacteria from pineapple (Ananas comosus) plant in semi-arid ecosystem

Genetic and metabolic diversities of rhizobacteria isolated from degraded soil of Ethiopia

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