[Algae-inhibitory effect and mechanism of plant source n-caprylic acid].
OBJECTIVE
To research the algae-inhibitory effect and mechanism of a plant source n-caprylic acid extracted from coconut oil on M. aeruginosa.


METHODS
The M. aeruginosa were treated with 0, 12.5, 25, 50 and 100 μL/L densities of coconut oil n-caprylic acid respectively. And the change of algal density, cell permeability and antioxidant ability were measured.


RESULTS
The greater the concentration of coconut oil n-caprylic acid, the stronger the inhibition on M. aeruginosa. When the concentration was 100 μL/L and processed time was 96 h, the inhibition ratio on M. aeruginosa reached 99%. Compared with the control group, the algal liquid conductivity, nucleic acid content and protein content of experimental groups increased significantly. The SOD activity enhanced with the increasing of coconut oil n-caprylic acid concentration (under 25 μL/L), but when beyond a certain concentration (exceed 25 μL/L), its activity weakened greatly. And the MDA content increased with the increasing of coconut oil n-caprylic acid concentration.


CONCLUSIONS
Coconut oil n-caprylic acid has a significant inhibiting effect on M. aeruginosa. Its mechanism may be largely related to cell membrane permeability change and antioxidant capacity reducing.
Yongling
Y
Chen
Guiying
G
Peng
Yuzhen
Y
Han
Tingting
T
Zhang
D000975:Antioxidants; D002210:Caprylates / Q000494:pharmacology*; D000074263:Coconut Oil; D046931:Microcystis / Q000187:drug effects*; D010938:Plant Oils / Q000737:chemistry*
D000975:Antioxidants; D002210:Caprylates; D010938:Plant Oils; D000074263:Coconut Oil