Plastid-associated galactolipid composition in eyespot-containing dinoflagellates: a review

Relative to the large number of photosynthetic dinoflagellate species, only a select few possess proteinaceous, carotenoid-rich eyespots which have been demonstrated in other algae act phototactic responses. The proteins comprising different categories are positioned or near peridinin-containing plastid membranes composed primarily two galactolipids, mono- and digalactosyldiacylglycerol (MGDG DGDG). Within eyespot-containing dinoflagellates, this arrangement occurs mostly those with secondary plastids, although some dinoflagellates tertiary plastids diatom origin known eyespots. We here provide an examination MGDG DGDG composition secondary, address fundamental question whether their component carotenoids associated alterations galactolipid when compared eyespot-lacking dinoflagellates. This is important because eyespot-plastid membrane system can be considered more complicated evolved state development. Included data on previously unexamined peridinin- type A Margalefidinium polykrikoides, D eyespot-containing, aberrant â??dinotomâ? Durinskia baltica. In addition, we reviewed from Chlorophyceae, Cryptophyceae, Euglenophyceae as comparison determine if algal classes apart Dinophyceae contain altered galactolipids association conclude that presence eyespot not noticeable changes composition. Key words: algae; digalactosyldiacylglycerol; dinoflagellate; eyespot; fatty acid; lipid; monogalactosyldiacylglycerol