單元大綱

  • The algae responsible for the red tide outbreak in Chilean Patagonia in 2018 and exhibits different morphology and metabolism than the New Zealand strain. It does not produce the gymnodimine found in the New Zealand strain (it is unclear if it can't, but not under culture conditions). It also shows low production of reactive oxygen. However, the damage organism species is similar to the New Zealand strain, suggesting the production of some toxin.

    The LCMS analysis reportedly detected a molecule with the same molecular weight of 656 as brevenal below. This signal was also detected in our analysis of the eastern Hokkaido strain. However, the signal we detected is an isotopic peak with a molecular weight of 655, suggesting that it is derived from some nitrogen-containing compound. The compound detected in the Patagonia strain is also concluded from the MS/MS data not to be brevenal.


    Note that brevenal is a compound obtained from K. brevis, also in the genus Karenia, and is one of the diverse ladder-shaped polyether compounds produced by the genus Karenia. It binds to sodium channels.