Microbial Ecology

, Volume 54, Issue 2, pp 324–331 | Cite as

Culturable Bacteria Present in the Fluid of the Hooded-Pitcher Plant Sarracenia Minor Based on 16S rDNA Gene Sequence Data

  • Alex J. Siragusa
  • Janice E. Swenson
  • Dale A. Casamatta


The culturable microbial community within the pitcher fluid of 93 Sarracenia minor carnivorous plants was examined over a 2-year study. Many aspects of the plant/bacterial/insect interaction within the pitcher fluid are minimally understood because the bacterial taxa present in these pitchers have not been identified. Thirteen isolates were characterized by 16S rDNA sequencing and subsequent phylogenetic analysis. The Proteobacteria were the most abundant taxa and included representatives from Serratia, Achromobacter, and Pantoea. The Actinobacteria Micrococcus was also abundant while Bacillus, Lactococcus, Chryseobacterium, and Rhodococcus were infrequently encountered. Several isolates conformed to species identifiers (>98% rDNA gene sequence similarity) including Serratia marcescens (isolates found in 27.5% of pitchers), Achromobacterxylosoxidans (37.6%), Micrococcus luteus (40.9%), Bacillus cereus (isolates found in 10.2%), Bacillus thuringiensis (5.4%), Lactococcus lactis (17.2%), and Rhodococcusequi (2.2%). Species–area curves suggest that sampling efforts were sufficient to recover a representative culturable bacterial community. The bacteria present represent a diverse community probably as a result of introduction by insect vectors, but the ecological significance remains under explored.


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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Alex J. Siragusa
    • 1
  • Janice E. Swenson
    • 1
  • Dale A. Casamatta
    • 1
  1. 1.Department of BiologyUniversity of North FloridaJacksonvilleUSA

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