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Water‐soluble M oringa oleifera lectin interferes with growth, survival and cell permeability of corrosive and pathogenic bacteria
Author(s) -
Moura M.C.,
Napoleão T.H.,
Coriolano M.C.,
Paiva P.M.G.,
Figueiredo R.C.B.Q.,
Coelho L.C.B.B.
Publication year - 2015
Publication title -
journal of applied microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 1364-5072
DOI - 10.1111/jam.12882
Subject(s) - serratia marcescens , bacillus megaterium , bacillus cereus , microbiology and biotechnology , pseudomonas fluorescens , bacteria , biology , lectin , membrane permeability , moringa , pathogenic bacteria , bacterial cell structure , biochemistry , food science , escherichia coli , membrane , genetics , gene
Abstract Aims This work evaluated the antibacterial activity of a water‐soluble Moringa oleifera seed lectin (WSMoL) by evaluating its effect on growth, survival and cell permeability of Bacillus sp., Bacillus cereus , Bacillus pumillus , Bacillus megaterium , Micrococcus sp., Pseudomonas sp., Pseudomonas fluorescens , Pseudomonas stutzeri and Serratia marcescens . In addition, the effect of lectin on membrane integrity of most sensitive species was also evaluated. All the tested bacteria are able to cause biocorrosion and some are also responsible for human infections. Methods and Results WSMoL inhibited the bacterial growth, induced agglutination and promoted the leakage of proteins from cells of all strains. Bactericidal effect was detected against Bacillus sp., B. pumillus , B. megaterium , Ps. fluorescens and Ser. marcescens . The bacteriostatic effect of lectin was evident with only 6 h of incubation. Fluorescence microscopy of Ser. marcescens showed that WSMoL caused loss of cell integrity and indicated an anti‐biofilm activity of the lectin. Conclusions WSMoL was active against the bacteria by inhibiting growth and affecting cell permeability. The lectin also interfered with membrane integrity of Ser. marcescens , the most sensitive species. Significance and Impact of the Study The study indicates that WSMoL was active against bacteria that cause serious problems in both industrial and health sectors. Also, the study contributes for the ‘state‐of‐art’ on antibacterial mechanisms of lectins.