Bacterial endophytes enhance competition by invasive plants

Rout, Marnie E.; Chrzanowski, Thomas H.; Westlie, Tara K.; DeLuca, Thomas H.; Callaway, Ragan M.; Holben, William E.

doi:10.3732/ajb.1200577

Cited by 79 publications

(61 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…While high levels of functional redundancy and soil microbial diversity suggest that changes in community structure may not affect function, there is evidence indicating that changes in microbial biomass and community structure may alter ecosystem processes (Reeve et al, 2010). Invasive plants have been shown to change soil ecosystem function (Weidenhamer and Callaway, 2010;Wolfe and Klironomos, 2005), which in one case was attributed to bacterial endophytes (Rout et al, 2013). The fact that Senegalia mellifera is leguminous and fixes nitrogen through symbiotic rhizobia strongly suggests that nitrogen cycling will be altered.…”

Section: Further Questionsmentioning

confidence: 99%

Soil microbial communities following bush removal in a Namibian savanna

Buyer

Schmidt‐Küntzel

Nghikembua

et al. 2016

SOIL

View full text Add to dashboard Cite

Abstract. Savanna ecosystems are subject to desertification and bush encroachment, which reduce the carrying capacity for wildlife and livestock. Bush thinning is a management approach that can, at least temporarily, restore grasslands and raise the grazing value of the land. In this study we examined the soil microbial communities under bush and grass in Namibia. We analyzed the soil through a chronosequence where bush was thinned at 9, 5, or 3 years before sampling. Soil microbial biomass, the biomass of specific taxonomic groups, and overall microbial community structure was determined by phospholipid fatty acid analysis, while the community structure of Bacteria, Archaea, and fungi was determined by multiplex terminal restriction fragment length polymorphism analysis. Soil under bush had higher pH, C, N, and microbial biomass than under grass, and the microbial community structure was also altered under bush compared to grass. A major disturbance to the ecosystem, bush thinning, resulted in an altered microbial community structure compared to control plots, but the magnitude of this perturbation gradually declined with time. Community structure was primarily driven by pH, C, and N, while vegetation type, bush thinning, and time since bush thinning were of secondary importance.

show abstract

Section: Further Questionsmentioning

confidence: 99%

Soil microbial communities following bush removal in a Namibian savanna

Buyer

Schmidt‐Küntzel

Nghikembua

et al. 2016

SOIL

View full text Add to dashboard Cite

show abstract

“…The main hypothesis is on the natural potential of siderophore utilization to help concentrate the natural iron source found in soils. For example, endophytes use siderophores as a key component to improve plant iron uptake from soil and also help in the production of indole-3-acetic acid, which is a plant growth hormone (43). Bacterial endophytes from invasive Sorghum sp.…”

Section: Plant Growth and Biocontrol Of Pathogensmentioning

confidence: 99%

Biotechnology of siderophores in high-impact scientific fields

Serrano

2017

Biomolecular Concepts

View full text Add to dashboard Cite

Different aspects of bacterial and fungal siderophore biotechnological applications will be discussed. Areas of application presented include, but are not limited to agriculture, medicine, pharmacology, bioremediation, biodegradation and food industry. In agriculture-related applications, siderophores could be employed to enhance plant growth due to their uptake by rhizobia. Siderophores hindered the presence of plant pathogens in biocontrol strategies. Bioremediation studies on siderophores discuss mostly the mobilization of heavy metals and radionuclides; the emulsifying effects of siderophoreproducing microorganisms in oil-contaminated environments are also presented. The different applications found in literature based in medicine and pharmacological approaches range from iron overload to drug delivery systems and, more recently, vaccines. Additional research should be done in siderophore production and their metabolic relevance to have a deeper understanding for future biotechnological advances.

show abstract

“…The interactions between nonmycorrhizal fungal endophytes and the AM fungi are known to enhance plant invasiveness (Larimer et al, 2010). Bacterial endophytes help invasive plants by providing a higher amount of phosphorous and iron and also secretes plant growth promoting hormones (IAA), thus increasing the competitive ability of the invasive plants (Rout et al, 2013).…”

Section: Interactions Between Soil Biota and Invasive Plantsmentioning

confidence: 99%

“…The invasion of Amaranthus viridis L., restricts the nodulation of Acacia sp. and reduces the growth of 30 strains of rhizobia originating from different regions in Africa (Sanon et al, 2011 (Rout & Chrzanowski, 2009;Rout et al, 2013).…”

Section: Role Of Bacterial Symbiosis In Plant Invasionmentioning

confidence: 99%

Role and influence of soil microbial communities on plant invasion

Ravi

Muthukumar

2017

View full text Add to dashboard Cite

Abstract. It is known that plant invasions are of major concern as they result in loss of biodiversity and alterations in ecosystem processes and functions. Although numerous mechanisms have been postulated to find out the reasons behind plant invasiveness, the actual and precise mechanism is still obscure. Soil microbes are considered as one of the important determinants of plant growth and establishment. Plant invasion leads to changes in the composition and structure of soil microorganisms. Most of the earlier studies have focused on the aboveground mechanisms of plant invasion. Recently the belowground mechanisms for plant invasion are being investigated. In this review, we focus on the various hypotheses related to soil microbes in either enhancing or suppressing plant invasions. The interactions between soil microbes with native and non-native plant species, the role of the plant-soil feedback system in the invasion and its impact, the function of mycorrhizal and bacterial symbiosis in plant species invasion and the role of soil biota and changes brought about in soil nutrient cycling and soil enzymes due to plant invasion are also discussed.

show abstract

Bacterial endophytes enhance competition by invasive plants

Abstract: This work suggests a major role of endophytes on growth and resource allocation of an invasive plant. Indeed, bacterial isolate physiology is correlated with invader effects on biogeochemical cycles of nitrogen, phosphate, and iron.

Cited by 79 publications

References 29 publications

Soil microbial communities following bush removal in a Namibian savanna

Soil microbial communities following bush removal in a Namibian savanna

Biotechnology of siderophores in high-impact scientific fields

Role and influence of soil microbial communities on plant invasion

Contact Info

Product

Resources

About