Full TGIF Record # 268251
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DOI:10.1007/s11104-015-2585-3
Web URL(s):https://link.springer.com/article/10.1007%2Fs11104-015-2585-3
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Publication Type:
i
Refereed
Author(s):Roberts, Elizabeth Lewis; Ferraro, Aileen
Author Affiliation:Southern Connecticut State University, New Haven, CT
Title:Rhizosphere microbiome selection by Epichlo√ę endophytes of Festuca arundinacea
Source:Plant and Soil. Vol. 396, No. 1-2, November 2015, p. 229-239.
# of Pages:11
Publishing Information:Dordrecht, The Netherlands: Kluwer Academic Publishers
Keywords:TIC Keywords: Endophyte-infected plants; Endophytic fungi; Epichloe; Festuca arundinacea; Loline alkaloids; Microbial activity; Rhizobacteria
Abstract/Contents:"Aims Loline alkaloids produced by Epichloe^D" spp. are known to deter feeding by insect herbivores while also serving as a significant carbon source for certain epiphytic bacteria on tall fescue leaves. In this study we examined the role of loline alkaloids in attracting certain bacteria to the rhizosphere of tall fescue plants that harbor loline producing fungal endophytes. Methods Population studies were used to compare the fitness of known loline catabolizing strains to other rhizosphere bacteria. Pyrosequencing of 16S rRNA fragments compared the composition of bacterial communities inhabiting the endophyte infected tall fescue (Festuca arundinacea) rhizosphere to those of endophyte free fescue plants. Results Rhizosphere population studies demonstrated that loline catabolizing strains Burkholderia ambifaria 7R and Pseudomonas aureofaciens outcompete and suppress the growth of non-loline catabolizing strains. Pyrosequencing of 16S rRNA fragments showed greater percentages of certain plant growth promoting bacteria in rhizosperes seeded with B. ambifaria 7R than noninoculated soils. Rhizospheres of endophyte infected plants showed higher species richness (Shannon diversity index = 4.03) over endophyte free rhizospheres (Shannon diversity index = 3.08) and a greater percentage of Firmicutes. Conclusions The differences in microbial community composition between endophyte-infected and endophytefree rhizospheres suggest that the presence of fungal endophytes influences microbial community structure. Loline alkaloid production may be one proxy by which the fungal endophyte shapes microbial communities, as evidenced by increased fitness of loline catabolizing bacteria in the tall fescue rhizosphere."
Language:English
References:36
Note:Equation
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ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Roberts, E. L., and A. Ferraro. 2015. Rhizosphere microbiome selection by Epichlo√ę endophytes of Festuca arundinacea. Plant Soil. 396(1-2):p. 229-239.
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DOI: 10.1007/s11104-015-2585-3
Web URL(s):
https://link.springer.com/article/10.1007%2Fs11104-015-2585-3
    Last checked: 10/06/2017
    Access conditions: Item is within a limited-access website
https://link.springer.com/content/pdf/10.1007%2Fs11104-015-2585-3.pdf
    Last checked: 10/06/2017
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
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