Journal ArticleDOI
Isolation and characterization of soybean‐associated bacteria and their potential for plant growth promotion
J. Kuklinsky-Sobral,Welington Luiz Araújo,Rodrigo Mendes,Isaias Olívio Geraldi,Aline Aparecida Pizzirani-Kleiner,João Lúcio de Azevedo,João Lúcio de Azevedo +6 more
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TLDR
It was found that 60% of endophytic and 69% of epiphytic isolates that produced IAA and solubilized mineral phosphate were also able to fix nitrogen in vitro, and the soybean-associated bacteria showing characteristics related to plant growth promotion were identified as belonging to the genera Pseudomonas, Ralstonia, Enterobacter, Pantoea and Acinetobacter.Abstract:
Endophytic and epiphytic bacteria were isolated from two soybean cultivars (Foscarin and Cristalina). Significant differences were observed in bacterial population densities in relation to season of isolation, soybean growth phase and the tissues from which the isolates were obtained. The isolates were identified by partial 16S rDNA sequence analysis, with most of the isolates belonging to the Pseudomonaceae, Burkholderiacea and Enterobacteriaceae groups. The potential of the isolates for plant growth promotion was evaluated by screening for indoleacetic acid (IAA) production and mineral phosphate solubilization; 34% of endophytic bacteria produced IAA and 49% were able to solubilize mineral phosphate whereas only 21% of epiphytic bacteria produced IAA although 52% were able to solubilize mineral phosphate. A high frequency of IAA producing isolates occurred in the early ripening Foscarin cultivar whereas a high percentage of phosphate solubilizing isolates were obtained from plants in the initial development stage (V6). We also found that 60% of endophytic and 69% of epiphytic isolates that produced IAA and solubilized mineral phosphate were also able to fix nitrogen in vitro. The soybean-associated bacteria showing characteristics related to plant growth promotion were identified as belonging to the genera Pseudomonas, Ralstonia, Enterobacter, Pantoea and Acinetobacter.read more
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Journal ArticleDOI
Acquisition of phosphorus and nitrogen in the rhizosphere and plant growth promotion by microorganisms
Alan Richardson,José Miguel Barea,Ann McNeill,Claire Prigent-Combaret,Claire Prigent-Combaret +4 more
TL;DR: Features of the rhizosphere that are important for nutrient acquisition from soil are reviewed, with specific emphasis on the characteristics of roots that influence the availability and uptake of phosphorus and nitrogen.
Journal ArticleDOI
Bacterial Endophytes and Their Interactions with Hosts
TL;DR: Molecular analysis showed that plant defense responses limit bacterial populations inside plants, and delivery of endophytes to the environment or agricultural fields should be carefully evaluated to avoid introducing pathogens.
Journal ArticleDOI
Genome Survey and Characterization of Endophytic Bacteria Exhibiting a Beneficial Effect on Growth and Development of Poplar Trees
Safiyh Taghavi,Craig Garafola,Sébastien Monchy,Lee A. Newman,Adam Hoffman,Nele Weyens,Tanja Barac,Jaco Vangronsveld,Daniel van der Lelie +8 more
TL;DR: In this paper, the authors identify endophytic bacteria that improve the biomass production and the carbon sequestration potential of poplar trees (Populus spp.) when grown in marginal soil and to gain an insight in the mechanisms underlying plant growth promotion.
Journal ArticleDOI
Exploiting plant–microbe partnerships to improve biomass production and remediation
TL;DR: Because many bacteria show a natural capacity to cope with contaminants, they could be exploited to improve the efficiency of phytoremediation or to protect the food chain by reducing levels of agrochemicals in food crops.
Journal ArticleDOI
Inside the root microbiome: Bacterial root endophytes and plant growth promotion
Jonathan R. Gaiero,Crystal A. McCall,Karen A. Thompson,Nicola J. Day,Anna Best,Kari E. Dunfield +5 more
TL;DR: The drivers of endophyte community structure relating to plant growth promotion, the mechanisms of plant growth Promotion, and the current and future use of molecular techniques to study these communities are reviewed.
References
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