Structure and activity of the bacterial community in the rhizosphere of different plant species and the effect of arbuscular mycorrhizal colonisation

Söderberg, Katarina; Olsson, Pål Axel; Bååth, Erland

doi:10.1111/j.1574-6941.2002.tb00955.x

Cited by 61 publications

(49 citation statements)

References 42 publications

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“…Furthermore, the most predominant bacterial families in the roots of reed and Japanese loosestrife were different; Burkholderiales genera incertae sedis for reed (15%) and Sinobacteraceae for Japanese loosestrife (12%). It has been reported that the bacterial community inhabiting the roots of terrestrial plants such as annual plants and trees apparently varies among different species (10, 11, 35, 36, 49). Therefore, the findings shown above suggested that aquatic plants might also harbor species-specific bacterial communities on the roots as is the case for terrestrial plants.…”

Section: Resultsmentioning

confidence: 99%

“…Many studies of the microbial communities associated with the roots of terrestrial plants have so far been reported (8, 10, 11, 18, 24, 32, 35, 36, 49), suggesting that the microbes might exert a beneficial, neutral or deleterious influence on plant growth. Some of these studies also revealed that the roots of different plant species interacted with different microbial communities (10, 11, 35, 36, 49), and that the growth and activity of microbial populations in the area, which is adjacent to the root system (rhizosphere) and on the external surface of the roots (rhizoplane) are, in general, greater than that root-free soil due to root exudates such as amino acids, sugars and growth factors (11, 26, 36).…”

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confidence: 99%

“…Some of these studies also revealed that the roots of different plant species interacted with different microbial communities (10, 11, 35, 36, 49), and that the growth and activity of microbial populations in the area, which is adjacent to the root system (rhizosphere) and on the external surface of the roots (rhizoplane) are, in general, greater than that root-free soil due to root exudates such as amino acids, sugars and growth factors (11, 26, 36). …”

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Microbial Community Analysis in the Roots of Aquatic Plants and Isolation of Novel Microbes Including an Organism of the Candidate Phylum OP10

et al. 2012

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A number of molecular ecological studies have revealed complex and unique microbial communities in various terrestrial plant roots; however, little is known about the microbial communities of aquatic plant roots in spite of their potential use for water quality improvement in aquatic environments (e.g. floating treatment wetland system). Here, we report the microbial communities inhabiting the roots of emerged plants, reed (Phragmites australis) and Japanese loosestrife (Lythrum anceps), collected from a floating treatment wetland in a pond by both culture-independent and culture-dependent approaches. Culture-independent analysis based on 16S rRNA gene sequences revealed that the microbial compositions between the two aquatic plant roots were clearly different (e.g. the predominant microbe was Betaproteobacteria for reed and Alphaproteobacteria for Japanese loosestrife). In comparisons of microbial communities between the plant roots and pond water taken from near the plants, the microbial diversity in the plant roots (e.g. 4.40–4.26 Shannon-Weiner index) were higher than that of pond water (e.g. 3.15 Shannon-Weiner index). Furthermore, the plant roots harbored 2.5–3.5 times more phylogenetically novel clone phylotypes than pond water. The culture-dependent approach also revealed differences in the microbial composition and diversity among the two plant roots and pond water. More importantly, compared to pond water, we succeeded in isolating approximately two times more novel isolate phylotypes, including a bacterium of candidate phylum OP10 (recently named Armatimonadetes) from the plant roots. These findings suggest that aquatic plants roots are significant sources for a variety of novel organisms.

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Section: Resultsmentioning

confidence: 99%

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Microbial Community Analysis in the Roots of Aquatic Plants and Isolation of Novel Microbes Including an Organism of the Candidate Phylum OP10

et al. 2012

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“…They can form living root-soil links and a specific zone of soil, which is called mycorrhizosphere [2]. The AM fungi can have an effect on rhizosphere through various mechanisms, such as alterations in soil properties, microbial community, and/or root exudates [3–5]. The symbiosis may help plants to thrive by colonizing a wide soil volume, accelerating photosynthesis, protecting plants against plant pathogens and pests in soil, absorbing resources efficiently, and dissipating of pollutants from the soil [4, 6–8].…”

Section: Introductionmentioning

confidence: 99%

Response of Arbuscular Mycorrhizal Fungi to Hydrologic Gradients in the Rhizosphere ofPhragmites australis(Cav.) Trin ex. Steudel Growing in the Sun Island Wetland

Wang

et al. 2015

BioMed Research International

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Within the rhizosphere, AM fungi are a sensitive variable to changes of botanic and environmental conditions, and they may interact with the biomass of plant and other microbes. During the vegetative period of the Phragmites australis growing in the Sun Island Wetland (SIW), the variations of AM fungi colonization were studied. Root samples of three hydrologic gradients generally showed AM fungi colonization, suggesting that AM fungi have the ability for adaptation to flooded habitats. There were direct and indirect hydrological related effects with respect to AM fungi biomass, which interacted simultaneously in the rhizosphere. Though water content in soil and reed growth parameters were both positively associated with AM fungi colonization, only the positive correlations between reed biomass parameters and the colonization could be expected, or both the host plant biomass and the AM fungi could be beneficial. The variations in response of host plant to the edaphic and hydrologic conditions may influence the effectiveness of the plant-mycorrhizal association. This study included a hydrologic component to better assess the role and distribution of AM fungi in wetland ecosystems. And because of that, the range of AM fungi was extended, since they actually showed a notable adaptability to hydrologic gradients.

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“…Wieland et al (2001) reported that the type of plant species (clover, bean, or alfalfa) selects for the microbial communities on their roots. Plant species are known to produce specific exudates (Söderberg et al, 2002), different leaching metabolites and proportions of chemicals (Fiehn et al, 2000) which can impact the bacterial community structure. These findings support previous results in our laboratory in which the epiphytic bacterial community structure of Hydrilla was found to be distinct from that on the native plant species eelgrass (Gordon-Bradley et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

Bacterial community structure in freshwater springs infested with the invasive plant species Hydrilla verticillata

Gordon-Bradley

Williams

2014

Hydrobiologia

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The phylogenetic composition and physiological profiles of bacterial communities in freshwater springs were evaluated during the blooming and non-blooming stages of the invasive plant species, Hydrilla verticillata. Community-level physiological profiles (CLPPs) and pyrosequencing of 16S rRNA gene amplicons were used to study potential Hydrilla mediated shifts in the physiological potential and phylogenetic composition of the bacterial community in infested systems. The results of CLPP revealed that the microbes in the Hydrilla invaded sites utilized less substrates during blooming periods than during nonblooming periods of the plant. Spearman’s rank correlation analysis showed some relationships between the relative abundances of bacterial taxa and the Biolog substrate utilization pattern. The relative abundance of the identified taxa showed some striking differences based on the blooming status of Hydrilla and to a lesser extent on site variation. The relative abundance of Actinobacteria, Bacteriodetes, and Verrucomicrobia was generally higher during Hydrilla blooms, while Deltaproteobacteria was generally higher during non-blooming stages of Hydrilla. The detected genera also varied based on the blooming stages of the plant. Based on the findings, it appears that Hydrilla alters the phylogenetic composition and structure of the bacterial community during the blooming stage.

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Structure and activity of the bacterial community in the rhizosphere of different plant species and the effect of arbuscular mycorrhizal colonisation

Cited by 61 publications

References 42 publications

Microbial Community Analysis in the Roots of Aquatic Plants and Isolation of Novel Microbes Including an Organism of the Candidate Phylum OP10

Microbial Community Analysis in the Roots of Aquatic Plants and Isolation of Novel Microbes Including an Organism of the Candidate Phylum OP10

Response of Arbuscular Mycorrhizal Fungi to Hydrologic Gradients in the Rhizosphere ofPhragmites australis(Cav.) Trin ex. Steudel Growing in the Sun Island Wetland

Bacterial community structure in freshwater springs infested with the invasive plant species Hydrilla verticillata

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