TEMPERATURE ACCLIMATION AND THE FATTY ACID COMPOSITION OF AN ANTARCTIC GREEN ALGA CHLORELLA (16th Symposium on Polar Biology)

• Main Authors: ナガシマ, ヒデユキ, マツモト, ゲンキ, オオタニ, シュウジ, モモセ, ハルオ, NAGASHIMA, Hideyuki, MATSUMOTO, Genki I., OHTANI, Shuji, MOMOSE, Haruo
• Language: English
• Published: National Institute of Polar Research 1995
• Subjects: Antarctic; Antarc*; Polar Biology; Proceedings of the NIPR Symposium on Polar Biology
• Online Access: https://nipr.repo.nii.ac.jp/record/5284/files/KJ00000767627.pdf; https://doi.org/10.15094/00005284; https://nipr.repo.nii.ac.jp/records/5284

P(論文) Antarctic green alga Chlorella vulgaris strain SO-26 cells cultured at 20℃ photosynthesize between 0-35℃, with a maximum rate at 20℃, while cells cultured at 10℃ show a shift of the optimum to about 2 to 3℃ lower and show higher activity than cells cultured at 20℃. Mesophilic alga Chlorella sorokiniana strain C-133 cells cultured at 20℃ photosynthesize between 5-45℃ with a maximum rate at 35℃, while cells cultured at 10℃ photosynthesize between 0-40℃ with a maximum rate at 30℃, in a temperature range about 5℃ lower than cells cultured at 20℃. Strain C-133 cells cultured at 20℃ show higher photosynthetic activity than cells cultured at 10℃. In both strains tested the major fatty acids are palmitic, linoleic and linolenic acids. When culture temperatures were changed from 20 to 10℃, the increase of the ratio of unsaturated fatty acid to total fatty acid in strain SO-26 was considerably greater than that in strain C-133. These results indicate that in photosynthesis the properties of an Antarctic Chlorella SO-26 are more psychrophilic than those of mesophilic Chlorella C-133, and both strains can be acclimated by the culture temperature, at least partly because of fatty acid unsaturation. departmental bulletin paper