Abstract: It is an object of the present invention to provide the eukaryotic microalgae, which have been genetically modified such that larger amounts of assimilation products produced by photosynthesis are directed to the synthesis of triglyceride (=triacylglycerol; TAG), and specifically, the present invention relates to a genetically modified strain of eukaryotic microalgae, in which a gene encoding an AGL1 protein is highly expressed, or a gene encoding an FAT1 protein and/or a gene encoding a DGAT2 protein are further highly expressed, as well as the gene encoding an AGL1 protein, wherein TAG productivity is improved in comparison to the parent strain thereof.

Abstract: It is an object of the present invention to provide the eukaryotic microalgae, which have been genetically modified such that larger amounts of assimilation products produced by photosynthesis are directed to the synthesis oftriglyceride (=triacylglycerol; TAG), and specifically, the present invention relates to a genetically modified strain of eukaryotic microalgae, in which a gene encoding an AGL1 protein is highly expressed, or a gene encoding an FAT1 protein and/or a gene encoding a DGAT2 protein are further highly expressed, as well as the gene encoding an AGL1 protein, wherein TAG productivity is improved in comparison to the parent strain thereof.

Abstract: A culture method for microalgae that cultures unicellular green microalgae belonging to the genus Coccomyxa and groups of organisms closely related thereto, or the Watanabea clade, in an open outdoor culture system using broth having a pH of 4 or lower. A culture method for microalgae that cultures microalgae of the genus Coccomyxa and groups of organisms closely related thereto, or Pseudococcomyxa, in an open outdoor culture system using broth having a pH of 4 or lower containing ammonia nitrogen.

Abstract: A culture method for microalgae that cultures unicellular green microalgae belonging to the genus Coccomyxa and groups of organisms closely related thereto, or the Watanabea clade, in an open outdoor culture system using broth having a pH of 4 or lower. A culture method for microalgae that cultures microalgae of the genus Coccomyxa and groups of organisms closely related thereto, or Pseudococcomyxa, in an open outdoor culture system using broth having a pH of 4 or lower containing ammonia nitrogen.

Abstract: An object of the present invention is to provide a novel microalga that produces hydrocarbons available as an alternative fuel to a diesel fuel (light oil). The present invention relates to a novel microalga Pseudochoricystis ellipsoidea having the ability to produce hydrocarbons, and to a process for producing hydrocarbons, characterized by culturing a microalga belonging to the genus Pseudochoricystis or the genus Choricystis having the ability to produce hydrocarbons, and collecting the hydrocarbon from the resulting cultured product.

Abstract: An object of the present invention is to provide a novel microalga that produces hydrocarbons available as an alternative fuel to a diesel fuel (light oil). The present invention relates to a novel microalga Pseudochoricystis ellipsoidea having the ability to produce hydrocarbons, and to a process for producing hydrocarbons, characterized by culturing a microalga belonging to the genus Pseudochoricystis or the genus Choricystis having the ability to produce hydrocarbons, and collecting the hydrocarbon from the resulting cultured product.