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. 2014 May 19;45(1):185-92.
doi: 10.1590/s1517-83822014000100024. eCollection 2014.

Tank bromeliad water: similar or distinct environments for research of bacterial bioactives?

F L Carmo  1 , H F Santos  2 , R S Peixoto  2 , A S Rosado  2 , F V Araujo  3
Affiliations

Tank bromeliad water: similar or distinct environments for research of bacterial bioactives?

F L Carmo et al. Braz J Microbiol. .

Abstract

The Atlantic Rainforest does not have a uniform physiognomy, its relief determines different environmental conditions that define the composition of its flora and fauna. Within this ecosystem, bromeliads that form tanks with their leaves hold water reservoirs throughout the year, maintaining complex food chains, based mainly on autotrophic and heterotrophic bacteria. Some works concluded that the water held by tank bromeliads concentrate the microbial diversity of their ecosystem. To investigate the bacterial diversity and the potential biotechnology of these ecosystems, tank bromeliads of the Neoregelia cruenta species from the Atlantic Rainforest in Brazil were used as models for this research. Bacteria isolated from these models were tested for production of bioactive compounds. DGGE of the water held by tank bromeliads was performed in different seasons, locations and sun exposure to verify whether these environmental factors affect bacterial communities. The DGGE bands profile showed no grouping of bacterial community by the environmental factors tested. Most of the isolates demonstrated promising activities in the tests performed. Collectively, these results suggest that tank bromeliads of the N. cruenta species provide important habitats for a diverse microbial community, suggesting that each tank forms a distinct micro-habitat. These tanks can be considered excellent sources for the search for new enzymes and/or new bioactive composites of microbial origin.

Keywords: Atlantic Rainforest; DGGE; bacteria communities; bromeliad.

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Figures

Figure 1
Figure 1
Count in Log of Total Coliforms, Thermotolerant Coliforms and Heterotrophic Bacteria in N. cruenta tank bromeliads in different exposure and location. 1. N. cruenta exposed to sun located in Corrego dos Colibris; 2. N. cruenta exposed to shadow located in Corrego dos Colibris; 3. N. cruenta exposed to sun located in Itacoatiara; 4. N. cruenta exposed to shadow located in Itacoatiara.
Figure 2
Figure 2
Score plot of main components analysis (PCA) showing the difference among DGGE band profiles of bacterial total community of N. cruenta tank bromeliads in different seasons, locations and sun exposure.
See this image and copyright information in PMC

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References

    1. Andreote FD, Azevedo JL, Araujo WL. Assessing the diversity of bacterial communities associated with plants. Braz J Microbiol. 2009;40:417–132. - PMC - PubMed
    1. APHA/AWWA/WEF. Standard Methods for the Examination of Water and Wastewater. 20 ed. Washington: APHA; 1998.
    1. Araújo FV, Medeiros RJ, Mendonça-Hagler LC, Hagler AN. A Preliminary Note on Yeast Communities of Bromeliad-Tank Waters of Rio de Janeiro, Brazil. Rev Microbiol. 1998;29:118–121.
    1. Armbruster P, Hutchinson RA, Cotgreave P. Factors influencing community structure in South American tank bromeliad fauna. Oikos. 2002;96:225–234.
    1. Bairagi A, Ghosh KS, Sem SK, Ray AK. Enzyme producing bacterial flora isolated from fish digestive tracts. Aquacult Int. 2002;10:109–12.

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