Hatha, A A M; Mujeeb Rahiman, K M; Jasmine, B; Suresh Kumar,S(International Journal of current microbiology and applied sciences, 2014)
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Abstract:
In natural systems phytoplankton interact with planktonic (free living) and attached
epiphytic bacteria both synergistically and antagonistically. The specificity of the
association with micro algae and bacteria differs in terms of adhesion mechanisms
and metabolic cooperation. Present research was carried out to study the effect of
bacterial isolates namely Bacillus sp. and Pseudomonas sp. from algal culture
systems on the growth of micro algae such as Chaetoceros calcitrans and
Nannochloropsis oculata. C. calcitrans (F= 15.34; P<0.05) and N. oculata
(F=12.52; P<0.05) showed significantly higher growth, in treatments with Bacillus
sp. and Pseudomonas sp when compared to control.
Hatha, A A M; Shubhankar Ghosh; Einar, RingØ2; Deborah Gnana Selvam, A; Mujeeb Rahiman, K M; Naveen, Sathyan; Nifty, John(Sophia, January 22, 2014)
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Abstract:
In the present study we address the issue on gut associated lactic acid bacteria (LAB) isolated from the intestine of
estuarine fish Mugil cephalus using de Man Rogossa and Sharpe (MRS) agar. LAB isolates were identified biochemically and
screened for their ability to inhibit in vitro growth of various fish, shrimp and human pathogens. Most of the LAB isolates displayed
an improved antagonism against fish pathogens compared to shrimp and human pathogens. Selected representative strains displaying
high antibacterial activity were identified using 16S rRNA gene sequence analysis. Of the selected strains Lactobacillus brevis was
the most predominant. Four other species of Lactobacillus, Enterobacter hormaechei and Enterobacter ludwigii were also identified.
It was also observed that even among same species, considerable diversity with respect to substrate utilization persisted. Considering
the euryhaline nature of grey mullet (Mugil cephalus), the LAB isolated from the gut possessed good tolerance to varying salt
concentrations. This finding merits further investigation to evaluate whether the isolated LAB could be used as probiotics in various
fresh and sea water aquaculture
Description:
International Journal of Aquaculture, 2014, Vol.4, No.01