Potential of PGPR in Agricultural Innovations

Kaymak, Haluk Çağlar

doi:10.1007/978-3-642-13612-2_3

Cited by 55 publications

(15 citation statements)

References 193 publications

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“…The beneficial bacteria are designated as PGPR if they show different plant growth promoting properties, e.g., nitrogen fixation, phytohormone production, nutrient mobilization, or biocontrol abilities. The ultimate benefit of the use of PGPR is not only their plant growth promoting attributes, but also their environment friendliness and their cost-effective nature ( Kaymak, 2011 ). Potato being an important food commodity needs special attention and requires extensive fertilization.…”

Section: Discussionmentioning

confidence: 99%

Differential Response of Potato Toward Inoculation with Taxonomically Diverse Plant Growth Promoting Rhizobacteria

et al. 2016

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Rhizosphere engineering with beneficial plant growth promoting bacteria offers great promise for sustainable crop yield. Potato is an important food commodity that needs large inputs of nitrogen and phosphorus fertilizers. To overcome high fertilizer demand (especially nitrogen), five bacteria, i.e., Azospirillum sp. TN10, Agrobacterium sp. TN14, Pseudomonas sp. TN36, Enterobacter sp. TN38 and Rhizobium sp. TN42 were isolated from the potato rhizosphere on nitrogen-free malate medium and identified based on their 16S rRNA gene sequences. Three strains, i.e., TN10, TN38, and TN42 showed nitrogen fixation (92.67–134.54 nmol h-1mg-1 protein), while all showed the production of indole-3-acetic acid (IAA), which was significantly increased by the addition of L-tryptophan. Azospirillum sp. TN10 produced the highest amount of IAA, as measured by spectrophotometry (312.14 μg mL-1) and HPLC (18.3 μg mL-1). Inoculation with these bacteria under axenic conditions resulted in differential growth responses of potato. Azospirillum sp. TN10 incited the highest increase in potato fresh and dry weight over control plants, along with increased N contents of shoot and roots. All strains were able to colonize and maintain their population densities in the potato rhizosphere for up to 60 days, with Azospirillum sp. and Rhizobium sp. showing the highest survival. Plant root colonization potential was analyzed by transmission electron microscopy of root sections inoculated with Azospirillum sp. TN10. Of the five test strains, Azospirillum sp. TN10 has the greatest potential to increase the growth and nitrogen uptake of potato. Hence, it is suggested as a good candidate for the production of potato biofertilizer for integrated nutrient management.

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Section: Discussionmentioning

confidence: 99%

Differential Response of Potato Toward Inoculation with Taxonomically Diverse Plant Growth Promoting Rhizobacteria

et al. 2016

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“…In agricultural systems, specific microbes are often used as bioinoculants to enhance crop productivity or to reduce pathogen and pest damage (Nelson, 2004 ; John et al, 2011 ). For example, plant growth-promoting rhizobacteria are applied directly to seed or to the soil when planting to ensure inoculation with the most beneficial strains (Kaymak, 2011 ). Plant-growth promoting fungi such as Trichoderma species can also have similar positive effects on plants distinct from other plant-symbiotic fungi such as mycorrhizal fungi and foliar fungal endophytes (Harman et al, 2004 ; Contreras-Cornejo et al, 2009 ).…”

Section: Invasive Species Management Through Microbiome Manipulationmentioning

confidence: 99%

Advancing the science of microbial symbiosis to support invasive species management: a case study on Phragmites in the Great Lakes

et al. 2015

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A growing body of literature supports microbial symbiosis as a foundational principle for the competitive success of invasive plant species. Further exploration of the relationships between invasive species and their associated microbiomes, as well as the interactions with the microbiomes of native species, can lead to key new insights into invasive success and potentially new and effective control approaches. In this manuscript, we review microbial relationships with plants, outline steps necessary to develop invasive species control strategies that are based on those relationships, and use the invasive plant species Phragmites australis (common reed) as an example of how development of microbial-based control strategies can be enhanced using a collective impact approach. The proposed science agenda, developed by the Collaborative for Microbial Symbiosis and Phragmites Management, contains a foundation of sequential steps and mutually-reinforcing tasks to guide the development of microbial-based control strategies for Phragmites and other invasive species. Just as the science of plant-microbial symbiosis can be transferred for use in other invasive species, so too can the model of collective impact be applied to other avenues of research and management.

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“…Previous works have highlighted approaches to harness microbe-rhizosphere interactions for increased farm productivity, [19][20][21] but how these interactions could be exploited for biotechnological applications is not fully known. Rhizospheremicrobial interactions are modulated by a number of chemicals produced by plant roots to communicate with soil microbes.…”

Section: Harnessing Plant-microbe Interactions For Enhancing Farm Promentioning

confidence: 99%

Harnessing plant-microbe interactions for enhancing farm productivity

Macdonald

Singh

2013

Bioengineered

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Declining soil fertility and farm productivity is a major global concern in order to achieve food security for a burgeoning world population. It is reported that improving soil health alone can increase productivity by 10-15% and in combination with efficient plant traits, farm productivity can be increased up to 50-60%. In this article we explore the emerging microbial and bioengineering technologies, which can be employed to achieve the transformational increase in farm productivity and can simultaneously enhance environmental outcomes i.e., low green house gas (GHG) emissions. We argue that metagenomics, meta-transcriptomics and metabolomics have potential to provide fundamental knowledge on plant-microbes interactions necessary for new innovations to increase farm productivity. Further, these approaches provide tools to identify and select novel microbial/gene resources which can be harnessed in transgenic and designer plant technologies for enhanced resource use efficiencies.

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Potential of PGPR in Agricultural Innovations

Cited by 55 publications

References 193 publications

Differential Response of Potato Toward Inoculation with Taxonomically Diverse Plant Growth Promoting Rhizobacteria

Differential Response of Potato Toward Inoculation with Taxonomically Diverse Plant Growth Promoting Rhizobacteria

Advancing the science of microbial symbiosis to support invasive species management: a case study on Phragmites in the Great Lakes

Harnessing plant-microbe interactions for enhancing farm productivity

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