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Abstract
This study investigated successional colonization of perennial ryegrass (PRG) by the rumen microbiota. PRG grown for 6 weeks in a greenhouse was incubated in sacco in the rumens of three Holstein × Freisian cows over a period of 24 h. PRG incubated within the rumen was subsequently harvested at various time intervals postincubation to assess colonization over time. DGGE-based dendograms revealed the presence of distinct primary (0-2 h) and secondary (4 h onwards) attached bacterial communities. Moving window analysis, band number and Shannon-Wiener diversity indices suggest that after 2 h a proportion of primary colonizing bacteria detach, to be replaced with a population of secondary colonizing bacteria between 2 and 4 h after entry of PRG into the rumen. Sequencing and classification of bands lost and gained between 2 and 4 h showed that the genus Prevotella spp. was potentially more prevalent following 4 h of incubation, and Prevotella spp. 16S rDNA-based QPCR supported this finding somewhat, as 2- to 4-h Prevotella QPCR data were greater but not significantly so. Low-temperature scanning electron microscopy showed that attached bacteria were predominantly enveloped in extracellular polymeric substances. In conclusion, colonization of fresh PRG is biphasic with primary colonization completed within 2 h and secondary colonization commencing after 4 h of attachment in this study.
Original language | English |
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Pages (from-to) | 186-196 |
Number of pages | 11 |
Journal | Letters in Applied Microbiology |
Volume | 56 |
Issue number | 3 |
Early online date | 11 Jan 2013 |
DOIs | |
Publication status | Published - Mar 2013 |
Keywords
- bacteria
- colonization
- DGGE
- plant
- QPCR
- rumen
- temporal
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Dive into the research topics of 'Successional colonization of perennial ryegrass by rumen bacteria'. Together they form a unique fingerprint.Projects
- 1 Finished
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RSB : Rumen Systems Biology
Biotechnology and Biological Sciences Research Council
01 Apr 2012 → 31 Mar 2017
Project: Externally funded research