scholarly journals Conservation tillage enhances the stability of the rhizosphere bacterial community responding to plant growth

2017 ◽  
Vol 37 (5) ◽  
Author(s):  
Ziting Wang ◽  
Lu Liu ◽  
Qing Chen ◽  
Xiaoxia Wen ◽  
Yang Liu ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Plant Growth ◽  
Conservation Tillage ◽  
Rhizosphere Bacterial Community ◽  
The Stability

scholarly journals Endophytic PGPB Improves Plant Growth and Quality, and Modulates the Bacterial Community of an Intercropping System

2021 ◽  
Vol 5 ◽  
Author(s):  
Sergio Pardo-Díaz ◽  
Felipe Romero-Perdomo ◽  
Jonathan Mendoza-Labrador ◽  
Diego Delgadillo-Duran ◽  
Edwin Castro-Rincon ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Plant Growth ◽  
Red Clover ◽  
Dry Weight ◽  
Forage Yield ◽  
Neutral Detergent Fiber ◽  
Plant Growth Promoting Bacteria ◽  
Shoot Dry Weight ◽  
Rhizosphere Bacterial Community ◽  
The Impact

The intercropping of ryegrass and red clover constitutes a sustainable alternative to mitigate the adverse effects of intensive livestock production on grassland degradation by increasing forage yield and quality. The implementation of biofertilization technologies has been widely used to improve soil nutritional properties, and therefore has the potential to ensure the success of this multicrop system. To determine the impact of bioaugmentation on forage growth and quality, as well as the associate changes in the rhizosphere bacterial community, we evaluated the inoculation with two plant growth-promoting bacteria (PGPB) under reduced nitrogen usage. Overall, Herbaspirillum sp. AP21 had a larger effect than Azospirillum brasilense D7 on plant growth. Inoculation with Herbaspirillum sp. AP21 together with 50% of the required nitrogen rate increased shoot dry weight, crude protein, and shoot nitrogen content, and decreased the amount of neutral detergent fiber. PGPB inoculation changed the rhizosphere bacterial community structure, which associated with forage growth and quality. We conclude that PGPB inoculation has the potential to improve the growth of the ryegrass-red clover system, decreasing the requirements for nitrogen fertilization.

scholarly journals Impact of Zinc Oxide Nanoparticles Amended Organic Manure on Arachis hypogaea Growth Response and Rhizosphere Bacterial Community

2020 ◽  
pp. 24-35
Author(s):  
Progress Oghenerume ◽  
Samuel Eduok ◽  
Basil Ita ◽  
Ofonime John ◽  
Inemesit Basssy
Keyword(s):  
Zinc Oxide ◽  
Bacterial Community ◽  
Plant Growth ◽  
Oxygen Uptake ◽  
Arachis Hypogaea ◽  
Growth Response ◽  
Oxygen Uptake Rate ◽  
Organic Manure ◽  
Loam Soil ◽  
Rhizosphere Bacterial Community

The effect of zinc oxide nanoparticle-organic manure amended ultisol and loam soils on plant growth response and rhizosphere bacterial community of peanut (Arachis hypogaea) was evaluated using standard methods under greenhouse conditions. Results indicate germination rates ranged between 30 and 100% in the amended soils compared to 50 and 70% in the controls. ZnO nanoparticles exerted concentration-dependent and varying effects on the plant root and shoot lengths, weights, nodules and pod formation in the two soil types. Heterotrophic bacterial counts ranged from 7.21 ± 0.51 to 7.38 ± 0.5 Log10CFUg-1 in the amended ultisol and 6.99 ± 0.55 Log10CFUg-1 in the control with a log reduction to 6.70 ± 0.39 Log10CFUg-1 in 500 mgkg⁻¹ ZnO spiked soil. Counts in the amended loam soil ranged between 6.59 ± 0.48 and 7.22 ± 0.41 Log10CFUg-1 relative to 6.80 ± 0.58 Log10CFUg-1 in the control. ZnO induced concentration-dependent effect on oxygen uptake rate relative to the controls. The organisms were members of the genera Lactobacillus, Pseudomonas, Bacillus, Rhizobium, Xanthobacter, Enterobacter, Citrobacter, Nitrosomonas and Agromyces. ZnO nanoparticle exerted concentration-dependent stimulatory and inhibitory effects on the plant growth response, oxygen uptake rate and induced temporal shifts in soil microbial abundance. It is challenging to generalize a consistent response of the plant or microorganisms because ZnO nanoparticles interacted with A. hypogaea and soil bacterial community in ways that differ in the ultisol and loam soil.

Plant nitrogen uptake drives rhizosphere bacterial community assembly during plant growth

2015 ◽  
Vol 85 ◽  
pp. 170-182 ◽  
Author(s):  
Colin W. Bell ◽  
Shinichi Asao ◽  
Francisco Calderon ◽  
Brett Wolk ◽  
Matthew D. Wallenstein
Keyword(s):  
Bacterial Community ◽  
Plant Growth ◽  
Nitrogen Uptake ◽  
Community Assembly ◽  
Plant Nitrogen ◽  
Plant Nitrogen Uptake ◽  
Rhizosphere Bacterial Community

scholarly journals Apple Scion Cultivars Regulate the Rhizosphere Microbiota of Scion/rootstock Combinations

2020 ◽  
Author(s):  
Yi Wang ◽  
Xiaofen Chai ◽  
Xiaona Wang ◽  
Hui Li ◽  
Xuefeng Xu ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Plant Growth ◽  
Plant Traits ◽  
Sugar Content ◽  
Soluble Sugar ◽  
Taxonomic Composition ◽  
Sugar Concentration ◽  
Composition And Structure ◽  
Plant Growth Promoting ◽  
Rhizosphere Bacterial Community

Abstract Grafting is a useful technique in the production of horticultural products. In addition to providing root system, rootstocks can increase stress tolerance of plants, influence scion growth and fruit yield, and harbor rich microbial community. But whether the scion modify plant growth, rootstock phenotypes and rhizosphere bacterial community has not been clearly investigated. Here, 14 different combinations of two scion cultivars grafted on 7 rootstock genotypes were used as research materials, we analyzed the plant traits, rhizosphere bacterial community, and potential functionalities across these plants in the same orchard. We found that apple scion cultivars influenced the tree high and trunk circumference, and the sugar concentration in root varied significantly between scion cultivars, especially fructose and sucrose. Apple scion cultivars was the largest source of variation in the rhizosphere bacterial diversity and taxonomic composition of grafted combinations. The dominant rhizosphere bacterial taxa were correlated with the root sugar concentration, especially sucrose. And the PICRUSt showed that rhizosphere bacteria contained fructose and sucrose metabolism and with plant growth-promoting traits. Additionally, the scion cultivar significantly affected the predicted metabolism of the rhizosphere-associated bacterial communities. Our results showed that apple scion varieties could regulate the composition and structure of rhizosphere bacterial community in different scion / rootstock combinations, which may be achieved by controlling soluble sugar content, especially sucrose in roots.

scholarly journals Accumulation of beneficial bacteria in the rhizosphere of maize (Zea mays L.) grown in a saline soil in responding to a consortium of plant growth promoting rhizobacteria

2021 ◽  
Vol 71 (1) ◽  
Author(s):  
Jieli Peng ◽  
Jia Ma ◽  
Xiaoyan Wei ◽  
Cuimian Zhang ◽  
Nan Jia ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Plant Growth ◽  
Saline Soil ◽  
Plant Growth Promoting Rhizobacteria ◽  
Salt Resistance ◽  
Beneficial Bacteria ◽  
Pgp Traits ◽  
Plant Growth Promoting ◽  
Rhizosphere Bacterial Community ◽  
Growth Promoting

Abstract Purpose Salt stress reduces plant growth and is now becoming one of the most important factors restricting the agricultural productivity. Inoculation of plant growth-promoting rhizobacteria (PGPR) has been shown to confer plant tolerance against abiotic stress, but the detailed mechanisms of how this occurs remain unclear and the application effects in different reports are unstable. In order to obtain a favorite effect of PGPR inoculation and improve our knowledge about the related mechanism, we performed this study to analyze the mechanism of a PGPR consortium on improving the salt resistance of crops. Methods A region-specific (Saline land around Bohai Sea in China) PGPR consortium was selected that contains three strains (Pseudomonas sp. P8, Peribacillus sp. P10, and Streptomyces sp. X52) isolated from rhizosphere of Sonchus brachyotus DC. grown in a saline soil. By inoculation tests, their plant growth-promoting (PGP) traits and ability to improve the salt resistance of maize were investigated and shifting in rhizosphere bacterial community of the inoculated plants was analyzed using the high-throughput sequencing technology. Results The three selected strains were salt tolerant, presented several growth promoting properties, and inhibited several phytopathogenic fungi. The inoculation of this consortium promoted the growth of maize plant and enriched the beneficial bacteria in rhizosphere of maize in a saline soil, including the nitrogen fixing bacteria Azotobacter, Sinorhizobium, and Devosia, and the nitrification bacteria Candidatus Nitrososphaera, and Nitrosovibrio. Conclusions The bacterial consortium P8/P10/X52 could improve plant growth in a saline soil by both their PGP traits and regulating the rhizosphere bacterial community. The findings provided novel information about how the PGPR helped the plants in the view of microbiome.

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