Gramine-induced growth inhibition, oxidative damage and antioxidant responses in freshwater cyanobacterium Microcystis aeruginosa

Inhibitory effect of Salicornia europaea on the marine alga Skeletonema costatum

“…We found that certain concentrations of rutin decreased the cell density of S. costatum and suppressed algal growth. Moreover, the inhibitory activity of rutin was negatively related to initial algal density, consistent with the effects of the algaecides N-phenyl-2-naphthylamine [35], eathyl-2-methyl acetoacetate [36], and gramine [37]. The IC 50 of rutin against growth of S. costatum was 6.69×10 −7 mol L 1 , which was much lower than its concentration in the root extract, suggesting that it may have been present at a significant concentration in the co-culture filtrate.…”

Allelochemical ethyl 2-methyl acetoacetate (EMA) induces oxidative damage and antioxidant responses in Phaeodactylum tricornutum

“…AsA and GSH contents had been owed to alleviating the injury by ROS [56]. In our study, although the change of regeneration rate of AsA and GSH pool were not significant in a regular pattern, the increase of AsA and GSH contents still showed that AsA and GSH systems were served as defense systems to resist EMA stress in marine diatom, and the previous reports also indicated that AsA and GSH pool alteration were different with algal species and stress factors [10,23].…”

“…Previous reports showed that the mechanisms of allelochemicals inhibition on algal growth were mainly in four aspects, destruction of cell structure, alteration of algal photosynthesis, respiration and enzymatic activities [9,10]. So far, only a few allelochemicals have been reported to induce enzymes and nonenzymatic antioxidant systems [11,12].…”

Metabolic activity and membrane integrity changes inMicrocystis aeruginosa– new findings on hydrogen peroxide toxicity in cyanobacteria

“…As an alternative to metals, other methods have been proposed for cyanobacterial water-bloom reduction, including physical treatments such as ultrasound (Zhang et al, 2006) and jet cavitation (Xu et al, 2006), and biological methods (Jancula et al, 2007;Hong et al, 2009). Unfortunately, these methods have not yet been studied systematically and thus their selective effect on target organisms remains in question.…”