TITLE:
Growth Responses of Some Bacterial Isolates to Some Environmental Parameters
AUTHORS:
Esther Aanuoluwa Ekundayo, Olayinka Temitayo Ogunmefun, Ijeoma Nwaefere Oguike, Fred Coolborn Akharaiyi, Oluwakemi Sola Asoso
KEYWORDS:
Maize Plants, Growth Responses, Bacterial Isolates, Secondary Metabolites, Biocontrol
JOURNAL NAME:
Advances in Bioscience and Biotechnology,
Vol.9 No.11,
November
16,
2018
ABSTRACT: This study was carried out
to investigate the antimicrobial activities of bacterial isolates of maize
against plant pathogens as well as their growth responses to some environmental
parameters. Twenty four bacterial isolates were obtained from maize plants
collected from the Department of Biological Sciences, AfeBabalola University,
Ado-Ekiti. The isolates were characterized by their biochemical and
physiological characteristics and were identified as Kurthiazopfu, Morganellamorganic, Rhodococcusequi, Bacillus subtilis, Catabaterhongkongensis, Brevibacteriumotitidis, Lactobacillus coleohominis, Staphylococcus aureus, Propionibacterium acnes among others.
Their responses to different NaCl concentrations, sugars, temperature as well
as antibiotics were determined. Most of the isolates were able to withstand
various environmental parameters in which they were subjected to. Also, eight
isolates were able to ferment sucrose. The bacterial isolates showed a degree
of resistance to the antibiotics tested. There was a high prevalence of
multidrug resistant bacteria showing resistance to 3 - 8 drugs. The
antagonistic effect of the bacterial isolates against selected fungi was
determined. None of the isolates showed antagonistic potential against the
fungal pathogens. However, the supposed antagonistic bacterial species can be
genetically modified to produce secondary metabolites that will result in
biocontrol.