Growth-promoting effect of alginate oligosaccharides on a unicellular marine microalga, Nannochloropsis oculata.
Effects of an alginate oligosaccharide mixture (AOM) on Nannochloropsis oculata, a unicellular marine microalga, were investigated. The growth of N. oculata was significantly promoted by AOM in a concentration-dependent manner. The maximum effect was attained at 20 mg/ml, at which the growth rate of the alga became nearly 5 times higher than that of control without AOM. The growth-promoting effect of AOM decreased slightly at 40 mg/ml. Furthermore, the algicidal effect of Cu(2+) was profoundly alleviated by the addition of AOM. These results suggest that AOM is useful for promoting and/or improving the growth of N. oculata.
Yokose
Takeshi
T
Nagasaki Prefectural Institute for Environment Research and Public Health, Omura, Nagasaki, Japan.
Nishikawa
Toru
T
Yamamoto
Yoshiko
Y
Yamasaki
Yasuhiro
Y
Yamaguchi
Kenichi
K
Oda
Tatsuya
T
D000464:Alginates / Q000494:pharmacology*; D003300:Copper / Q000633:toxicity; D004305:Dose-Response Relationship, Drug; D056890:Eukaryota / Q000166:cytology / Q000187:drug effects* / Q000254:growth & development* / Q000502:physiology; D020723:Glucuronic Acid / Q000494:pharmacology; D006603:Hexuronic Acids / Q000494:pharmacology; D009844:Oligosaccharides / Q000494:pharmacology*; D013312:Stress, Physiological / Q000187:drug effects
D000464:Alginates; D006603:Hexuronic Acids; D009844:Oligosaccharides; D003300:Copper; D020723:Glucuronic Acid