Soil Microbiota and Sustainable Jhum Agroecosystem

2019 ◽  
pp. 57-82
Author(s):  
S. R. Joshi ◽  
Donald Bareh ◽  
Aishiki Banerjee
Keyword(s):  
Soil Microbiota

Impact of Iron, Copper, and Nickel Ions Introduced into the Soil Separately and in Various Combinations on Soil Microbiota

2021 ◽  
Vol 48 (10) ◽  
pp. 1761-1770
Author(s):  
Y. V. Pleshakova ◽  
N. A. Zelenova ◽  
C. T. Ngun ◽  
M. V. Reshetnikov
Keyword(s):  
Soil Microbiota ◽  
Nickel Ions ◽  
Iron Copper

scholarly journals Suppression of the activity of arbuscular mycorrhizal fungi by the soil microbiota

2018 ◽  
Vol 12 (5) ◽  
pp. 1296-1307 ◽  
Author(s):  
Nanna B Svenningsen ◽  
Stephanie J Watts-Williams ◽  
Erik J Joner ◽  
Fabio Battini ◽  
Aikaterini Efthymiou ◽  
...  
Keyword(s):  
Arbuscular Mycorrhizal Fungi ◽  
Mycorrhizal Fungi ◽  
Arbuscular Mycorrhizal ◽  
Soil Microbiota

scholarly journals Influence of Cry1Ac Toxin From Bt Cotton on the Soil Microbiota

2019 ◽  
Vol 11 (4) ◽  
pp. 364
Author(s):  
Marcos Gino Fernandes ◽  
Renata Pires de Araújo ◽  
Eduardo Neves Costa ◽  
Ana Claudia Terumi Abe Zangirolymo ◽  
Rodrigo Matheus Pereira
Keyword(s):  
Soil Bacteria ◽  
Marker Gene ◽  
First Record ◽  
Transgenic Cotton ◽  
Natural Soil ◽  
Bt Cotton ◽  
Bacterial Populations ◽  
Soil Microbiota ◽  
Cry1ac Toxin ◽  
Gene 16S Rrna

The first record of transgenic cotton cultivation in Brazil was in 2005, of that of the cultivar MON 531, possessing the cry1Ac gene. Since then, no evaluation has been performed to understand whether the cultivation of Bt cotton has caused any interference with the soil microbiota, including bacteria. In this context, our research was aimed to assess whether the cultivation of Bt cotton negatively affects the community of soil bacteria, through quantitative and metagenomic analyses (marker gene 16S rRNA) for phylum identification. Samples of bacterial populations obtained from the soil cultivated with Bt cotton expressing the Cry1Ac toxin were compared with soil samples from the area cultivated with conventional cotton. Significant differences were not observed in the measure of colony-forming units of bacteria between the soils cultivated with Bt and non-Bt cotton; however, differences were detected only when comparing samples from different collection times of the Bt treatment. Cultivation of Bt cotton did not affect the diversity of the soil bacterial population. Overall, our study shows that, similar to most of the works that have been reported worldwide, cultivation of transgenic cotton does not seem to affect the quantity and diversity of natural soil bacteria.

scholarly journals Metagenomic profiles of soil microbiota under two different cropping systems detected by STRs-based PCR

2012 ◽  
Vol 03 (01) ◽  
pp. 98-103
Author(s):  
Massimo Zaccardelli ◽  
Domenica Villecco ◽  
Francesco Campanile ◽  
Catello Pane
Keyword(s):  
Cropping Systems ◽  
Soil Microbiota

Distinct rhizomicrobiota assemblages and plant performance in lettuce grown in soils with different agricultural management histories

2021 ◽  
Vol 97 (4) ◽  
Author(s):  
Doreen Babin ◽  
Loreen Sommermann ◽  
Soumitra Paul Chowdhury ◽  
Jan H Behr ◽  
Martin Sandmann ◽  
...  
Keyword(s):  
Growth Regulators ◽  
Stress Responses ◽  
Crop Production ◽  
Agricultural Management ◽  
Plant Performance ◽  
16S Rrna Genes ◽  
Rrna Genes ◽  
Soil Microbiota ◽  
Sustainable Crop Production

ABSTRACT A better understanding of factors shaping the rhizosphere microbiota is important for sustainable crop production. We hypothesized that the effect of agricultural management on the soil microbiota is reflected in the assemblage of the rhizosphere microbiota with implications for plant performance. We designed a growth chamber experiment growing the model plant lettuce under controlled conditions in soils of a long-term field experiment with contrasting histories of tillage (mouldboard plough vs cultivator tillage), fertilization intensity (intensive standard nitrogen (N) + pesticides/growth regulators vs extensive reduced N without fungicides/growth regulators), and last standing field crop (rapeseed vs winter wheat). High-throughput sequencing of bacterial and archaeal 16S rRNA genes and fungal ITS2 regions amplified from total community DNA showed that these factors shaped the soil and rhizosphere microbiota of lettuce, however, to different extents among the microbial domains. Pseudomonas and Olpidium were identified as major indicators for agricultural management in the rhizosphere of lettuce. Long-term extensive fertilization history of soils resulted in higher lettuce growth and increased expression of genes involved in plant stress responses compared to intensive fertilization. Our work adds to the increasing knowledge on how soil microbiota can be manipulated by agricultural management practices which could be harnessed for sustainable crop production.

Reduced tillage, cover crops and organic amendments affect soil microbiota and improve soil health in Uruguayan vegetable farming systems

2021 ◽  
Vol 97 (3) ◽  
Author(s):  
Victoria Cerecetto ◽  
Kornelia Smalla ◽  
Joseph Nesme ◽  
Silvia Garaycochea ◽  
Pablo Fresia ◽  
...  
Keyword(s):  
Cover Crop ◽  
Soil Health ◽  
Farming Systems ◽  
Conventional Tillage ◽  
Soil Restoration ◽  
Reduced Tillage ◽  
Rrna Gene ◽  
Organic C ◽  
Soil Microbiota ◽  
Vegetable Farming

ABSTRACT Conventional tillage and mineral fertilization (CTMF) jeopardize soil health in conventional vegetable production systems. Using a field experiment established in Uruguay in 2012, we aimed to compare the soil restoration potential of organic fertilization (compost and poultry manure) combined with conventional tillage and cover crop incorporated into the soil (CTOF) or with reduced tillage and the use of cover crop as mulch (RTOF). In 2017, table beet was cultivated under CTMF, CTOF and RTOF, and yields, soil aggregate composition and nutrients, as well as soil and table beet rhizosphere microbiota (here: bacteria and archaea) were evaluated. Microbiota was studied by high-throughput sequencing of 16S rRNA gene fragments amplified from total community DNA. RTOF exhibited higher soil aggregation, soil organic C, nutrient availability and microbial alpha-diversity than CTMF, and became more similar to an adjacent natural undisturbed site. The soil microbiota was strongly shaped by the fertilization source which was conveyed to the rhizosphere and resulted in differentially abundant taxa. However, 229 amplicon sequencing variants were found to form the core table beet rhizosphere microbiota shared among managements. In conclusion, our study shows that after only 5 years of implementation, RTOF improves soil health under intensive vegetable farming systems.

Ally or Foe: Role of Soil Microbiota in Shaping Root Architecture

2021 ◽  
pp. 73-91
Author(s):  
Srayan Ghosh ◽  
Shraboni Ghosh
Keyword(s):  
Root Architecture ◽  
Soil Microbiota

scholarly journals Response of Horticultural Soil Microbiota to Different Fertilization Practices

Plants ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 1501
Author(s):  
Iratxe Zarraonaindia ◽  
Xabier Simón Martínez-Goñi ◽  
Olaia Liñero ◽  
Marta Muñoz-Colmenero ◽  
Mikel Aguirre ◽  
...  
Keyword(s):  
Organic Fertilizer ◽  
Soil Health ◽  
Disease Suppression ◽  
Glutathione Metabolism ◽  
Plant Interactions ◽  
Organic Fertilization ◽  
Soil Microbiota ◽  
Xenobiotic Compound ◽  
Soil Prokaryotes ◽  
Rapid Shift

Environmentally friendly agricultural production necessitates manipulation of microbe–plant interactions, requiring a better understanding of how farming practices influence soil microbiota. We studied the effect of conventional and organic treatment on soil bacterial richness, composition, and predicted functional potential. 16S rRNA sequencing was applied to soils from adjacent plots receiving either a synthetic or organic fertilizer, where two crops were grown within treatment, homogenizing for differences in soil properties, crop, and climate. Conventional fertilizer was associated with a decrease in soil pH, an accumulation of Ag, Mn, As, Fe, Co, Cd, and Ni; and an enrichment of ammonia oxidizers and xenobiotic compound degraders (e.g., Candidatus Nitrososphaera, Nitrospira, Bacillus, Pseudomonas). Soils receiving organic fertilization were enriched in Ti (crop biostimulant), N, and C cycling bacteria (denitrifiers, e.g., Azoarcus, Anaerolinea; methylotrophs, e.g., Methylocaldum, Methanosarcina), and disease-suppression (e.g., Myxococcales). Some predicted functions, such as glutathione metabolism, were slightly, but significantly enriched after a one-time manure application, suggesting the enhancement of sulfur regulation, nitrogen-fixing, and defense of environmental stressors. The study highlights that even a single application of organic fertilization is enough to originate a rapid shift in soil prokaryotes, responding to the differential substrate availability by promoting soil health, similar to recurrent applications.

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